Document NGd7Z9Vr5ma2qwbYa4xJYxGgp

FORD Service Manual Tractor Series 600, 700, 800, 900, 501, 601,701,801,901, 1801, 2000, and 4000 1954-1964 ISEW HOLLAND Reprinted 300 Chapter 1 -A--Power Steering--General Purpose Tractors 6. TROUBLE SHOOTING See Chapter 1-C Page 338. 7. SPECIFICATIONS Pump--Used in early model "General Purpose" Tractors Capacity.......................6.50 gpm @ 3000 rpm and 100 psi Type .....................................................................................Sleeve Drive .........................................................................................Belt Maximum Operating Pressure.........................700-800 psi Cylinder Type......................................................................Double Acting Torque Limits Ft. lbs. Sector Shaft Cover Bolts................................................25-30 Adapter to Steering Gear Housing...............................20-25 Steering Gear Housing to Transmission...................60-70 Steering Shaft Cover and Valve Housing Assemblies to Adapter........................................................20 Sleeve Type Pump End Cap and Bearing Cap to Pump Body Bolts............................................15-20 8. SPECIAL TOOLS The following tools will be helpful in removing, re pairing or servicing the various components of the power steering mechanism. Tool Number Description 956 .........................................................................Puller Bearing 955-14 .................................Jaws (for 956 Puller)--Bearing N3 10776 ...........................................Fixture Cylinder Block AA......................................................................Snap Ring Pliers Part THREE STEERING, FRONT AXLE, BRAKES, WHEELS, AND TERES Chapter 1-B Section Power Steering--Row Crop Tractors Page 1 Construction and Operation .................................................................................................................................................... 301 2 Drag Link ....................................................................................................................................................... 306 3 Power Steering Pump--RotorType....................................................................................................................................... 307 4 Steering Gear ................................................................................................................................................................................. 311 5 Power Cylinder and ControlValve Assembly................................................................................................................. 316 6 Trouble Shooting .......................................................................................................................................................................... 322 7 Specifications................................................................................................................................................................................... 322 8 Special Tools ............................................................................................................................................................................... 322 1. CONSTRUCTION AND OPERATION Power steering information on this page through page 322, is applicable to all "Row Crop" tractors. For power steering information on other models, see pages 282 to 300 ("General Purpose" tractors) or pages 323 to 340 ("Industrial Tractors"). All units that affect the directional control of the tractor are components of the steering mechanism. These units are: the steering gear (including the steer ing column and steering wheel), the drag link, oil pump and reservoir, power cylinder and control valve, and the steering arm, Figure 1. The system employs the conventional Ford Tractor mechanical steering gear and linkage plus a hydraulic oil pump, and a power cylinder and control valve to provide a power assist in all steering operations. In the event of failure of the power assist components, the mechanical gear and linkage will provide positive steering control at all times. *. S rag Link The drag link, Figure 1, consists of the drag link and the drag link adjusting sleeve. It is the steering linkage between the Pitman arm, attached to the steering gear, and the steering arm. Figure 2, connected to the front spindle assembly. "Row Crop" tractors have one drag link. It is mounted on the right side of the tractor. The drag link has no moving parts and requires little maintenance. Whenever it becomes necessary to change the length of the drag link, as in the case of a position adjustment of the front axle, care must be exercised to avoid changing the position of the steering arm. See page 307 in this section for details. B. Power Steering Pump Rotor-Type: Early model "Row Crop" tractors are equipped with a rotor-type pump and reservoir, mounted at the front right side of the engine, Figure 2. The pump is driven from the engine crankshaft by a single V-belt Two elongated holes in the pump support bracket provide a means for adjusting the belt tension. The pump consists of a six-lobed drive rotor and a seven-lobed driven rotor mounted in a cast iron body, Figure 3. The drive rotor which is keyed to the pump drive shaft has external lobes or teeth which are meshed with the ini - mal lobes of the driven rotor. The drive shaft Is suppc-.' id at the pulley end by a sealed ball bearing Figure.' 9. The bearing, which is a slip fit in the pump body, is held in place by a snap ring. A lip-type, spring-loaded oil seal is installed behind the bearing. The center and the inner end of the drive shaft are supported by bronze bushings pressed into the pump body and the pump cover. As the pump rotors turn, the clearance volume of the pockets formed between the lobes increases, then 301 302 Chapter 1 -B--Power Steering--Row Crop Tractors OIL PUMP PUMP SUPPORT BRACKET PUMP SUPPORTS SIDE RAIL SUPPORT stf <t -"-s-? . rv*V.! Figure 1--Components of Power Steering System decreases. This action propels oil from the suction (intake) side to the discharge side of the pump. Minimum output of the pump occurs when the engine is at idle speed. This minimum output is suf ficient to provide a power assist for turning. Maximum output of the pump, at higher engine speeds, is limited to 2.75 gallons per minute by a spool-type, spring-loaded flow control valve, mounted in the pump cover, Figure 4. It is held in place by a filing -'4iich is sealed with a neoprene "O" ring. The v.e've, tv .-itch is hollow and closed at one end, has two sraasr nieti. ing orifices in its wall, 180 apart. Mounted inside the flow control valve is a springloaded pressure relief valve, Figure 4. The relief valve and relief valve spring are held in place by a snap ring. An orifice plate, with a small metering hole in its center, is installed between the flow control valve spring and the pressure relief valve snap ring. When the system is operating, oil from the pres sure side of the pump flows into the chamber con taining the flow control valve. A flat, ground on the land at the closed end of the valve allows the oil to flow behind the closed end of the valve. Oil also flows to the inside of the valve through the two metering holes in the valve wall. From here the oil flows through the pressure relief valve and orifice plate and out through the pump discharge to the control valve. When pump speed is increased (by increasing en gine speed), pump output tends to exceed a maxi mum of 2.75 gallons per minute. This creates a pressure differential between the outside and the in side of the flow control valve, due to the flow of oil through the metering orifices. This causes the flow control valve to move back against the flow control valve spring and allow excess oil to be by-passed within the pump. The oil pressure relief valve, mounted inside the flow control valve, is designed to limit pump pres sure to 1100 psi. The valve operates as follows: When, pump pressure tends to exceed 1100 psi, the force of the relief valve spring is overcome and pres sure against the face, at the orifice plate end, moves the relief valve to the right This movement uncovers ports in the flow control valve and permits the oil to return to the intake side of the pump, thus preventing a pressure build-up in excess of 1100 psi. The relief Section 1 --Construction and Operation 303 Figure 2--Installed View of Power Steering System Components action of the relief valve takes place regardless of the position of the flow control valve, since the flow con trol valve regulates only the volume of oil exhausted from the pump. Roller Vane-Type: Late model "Row Crop" tractors use a roller vane-type pump. The operation of this pump is described in Chapter 1-C. C. Steering Gear All "Row Crop" tractors use a worm and sector- type steering gear, Figure 17. The worm, which is integral with the steering shaft, transmits motion through the sector and sector shaft, to the Pitman arm and the drag link which is connected to the front steering arm. Only one sector shaft is used and all steering is controlled from one steering arm mounted on the right side of the tractor. The backlash between the worm gear and the sec tor gear must be properly adjusted so that the gears do not bind. This adjustment is made' by turning an eccentric sleeve in which the worm gear rides. j PRESSURE RELIEF - M -i-'-.y-vALVE PRESSURE RELIEF '& VALVE F.'-'KHS - DRIVEI ROTOR INSERT PUMP BODY 2642 Figure 3--Cutaway View of Rotor-Type Oil Pump FLOW CONTROL . VALVE SPRING 'l - PUMP COVER OUTLET FITTING ORIFICE. SNAP RING PLATE FLOW CONTROL VALVE 2643 Figure 4--Cutaway View of Pump Flow Control Valve 304 Chapter 1 -B--Power Steering--Row Crop Tractors Turning the sleeve moves the worm gear in or out in relation to the sector gear. Position of the sleeve is maintained by a rotating lock plate mounted in the end cover and splined to the sleeve. The worm bear ing preload is controlled by an adjusting screw and lock nut located in the end cover, Figure 23. D. Power Cylinder and Control Valve Assembly The power cylinder and control valve assembly is located at the right side of the tractor, Figure 2. The control valve sleeve, which is at the front end of the assembly, is threaded onto the drag link and attached to the front steering arm. The piston rod, which ex tends from the rear of the assembly, is attached to the pedestal side rail support, Figure 2. The power cylinder is double-walled. A lip-type oil seal, bushing, dust seal, and scraper, installed in the rod end of the cylinder, are held in place by a snap ring, Figure 25. The piston end of the cylinder is attached to the control valve housing. The control valve consists of a control valve hous ing, a sleeve and flange assembly bolted to the hous ing, and the internal parts shown in Figure 25. The control valve ball stud, spring, retainer, and spring stop plug are installed in the sleeve and flange assembly. The parts are held in place by a control valve spool stop screw which threads into the end of the ball stud retainer. The control valve spool, seals, and retainers, mounted in the valve housing, are held in position by a long bolt which passes through the valve spool. The bolt is connected to the ball stud retainer by a spring, stop plug, and stop screw, Figure 27. A stop pin, inserted through the stop screw and the bolt head, prevents the bolt from rotating. A self-locking nut secures the bolt to the outer end of the valve spool assembly. The control valve spool is constructed with three radial lands and four radial valleys to provide the passages necessary for the directional control of the fluid. T1-.5' centr'd *%}* housing incorporates sn inlet, cutlet, and . w pov-er cylinder porter. The reservoir outlet port is equipped with a ball-type check valve. In the power cylinder, one of the two oil passages, connecting with the control valve, carries the oil be tween the cylinder walls to the piston rod end of the cylinder. The other passage carries oil directly into the piston end of the cylinder. Both passages are used as oil return lines. Oil is directed either ahead of the piston or behind the piston (depending upon the turn being made). When the oil pressure at one end of the power cyl inder becomes great enough, the cylinder moves on the piston rod to provide the power assist As the cylinder moves, the oil at the opposite end of the cylinder is forced out and returns to the reservoir through the control valve. In the power steering operation, oil under pressure is delivered from the pump to the control valve through a flexible hose. When the steering wheel is turned, the steering linkage moves the control valve spool within the control valve housing. This action opens a series of passages which direct the oil flow to the power cylinder. The movement of the valve spool within the housing is controlled, by positive stops, to approximately 0.060 inch. The control valve is de signed so that the power assist is accomplished before the valve spool reaches the stop, thus insuring a sensitive response. As the drag link moves further, the entire control valve assembly and the steering spindle arm move as a unit, assisted by the power cylinder. When the rotation of the steering wheel is stopped, the thrust against the control valve is removed. This permits the movement of the steering arm by the cylinder to move the valve housing until the spool is in its center position. Hydraulic pressure retains the spool in its center position by means of oil pas sages between two valleys in the valve spool and the chambers between the outer lands and the housing seals. If the ball stud is moved forward, the pressure in the chamber at the forward end of the spool in creases in proportion to the pressure applied to the power cylinder. Thus, the hydraulic centering force provides a feel at the steering wheel which is pro portional to the effort required to' turn the front wheels. E. Straight-Ahead Driving In straight-ahead driving, the centered control valve spool, Figure 5, permits oil from the pump to flow past the valve spool lands back to the reservoir. The pump delivers just enough oil to overcome a small amount of back pressure that exists in the sys tem under this condition. In the power cylinder, pres sure is transmitted to both sides of the pmtoia and a balanced condition exists. F. Left or Right Turning For either left or right turning, the function of the control valve is the same except for the direction of movement, Figures 6 and 7. For left toning, the spool moves toward the rear. In this position, the oil passage from the piston rod end of the cylinder is open to the pump but closed to the reservoir. Oil under pressure at the piston rod end forces the cylinder (and the steering arm) to the rear, thus providing the power assist for the left turn. Simultaneously, the oil passage from the piston end Section 1--Construction and Operation CHECK VALVE M 305 Figure 5--Flow Diagram--Oil Flow with Pump Flow Control Valve in Center Position ri \ 4! \ SIDE RAIL V SUPPORT \X --------- ' CHECK VALVE TO RESERVOIR , FROM PUMP POWER CYLINDER CONTROL VALVE BALL STUD /a. 1^-1 PRESSURE RETURN Ak Kj,----, lA FRONT i s&z'Z 1 STEERING ARM \`w'------- 'O/ SX Figure 6--Flow Diagram--Oil Flow with Pump Flow Control Valve in Left Turn Position 306 Chapter 1-B--Power Steering--Row Crop Tractors AN *i v HY \ SIDE RAIL ' SUPPORT V "-- CHECK VAIVE TO RESERVOIR -FROM PUMP POWER CYLINDER CONTROL VALVE BALI STUD PRESSURE RETURN ,k CL-n0N M-) FRONT y s. STEERING ARM / Figure 7--Flow Diagram--Oil Flow with Pump Flow Control Valve in Right Turn Position of the cylinder is open to the reservoir but closed to the pump, permitting the oil to flow through the con trol valve to the reservoir. In right turning, the spool moves toward the front Oil under pressure is directed to the piston end of the cylinder moving the cylinder (and steering arm) forward. Simultaneously, oil from the piston rod end is returned to the reservoir. G. Operation Without Pressure Supply The steering mechanism is designed to operate manually if the pump fails to deliver oil under pres sure. In this situation, steering wheel thrust is trans mitted through the drag link to the control valve spool which moves approximately 0.060 inch before it contacts its stop. Then, the full manual effort is transmitted mechanically to the steering linkage. With the valve spool off its center position, oil is directed to either end of the power cylinder through the return port check valve. Thus, manual movement of the power cylinder is not restricted by the neces sity of forcing oil back through the pump, and steer ing effort is not appreciably increased over that re quired for the manual steering system. 2. DRAG LINK A. Removal 1. Remove the drag link by removing the cotter pins and the castellated nuts which attach it to the Pitman arm (rear) and to the control valve sleeve and flange assembly (front), Figures 1 and 2. 2. Remove the sleeve from the rear of the drag link by loosening the hex nuts and lock washers and threading the sleeve off of the drag link and the drag link end. B. Inspection 1. Visibly inspect the parts for wear or damage. Replace the drag link if defective. Section 3--Power Steering Pump--Rotor Type 307 C. Installation 1. Thread the sleeve onto the drag link end and onto the drag link. Do not tighten the hex nuts. 2. Position the drag link to the ball stud on the control valve sleeve and flange and secure with the castellated nut and the cotter pin. 3. With the steering wheel and the front wheels in straight-ahead position, adjust the sleeve as necessaiy to position the drag link end to the Pitman arm. Secure with the castellated nut and the cotter pin. 4. Tighten the sleeve lock nuts. 3. POWER STEERING PUMP--ROTOR TYPE A. Removal NOTE: Complete instructions for overhaul ing the Roller Vane-type pump are given in Chapter 1-C of Part THREE. 1. Remove the oil reservoir cover and withdraw as much oil as possible using a suction gun. 2. Disconnect the pressure line and the return line hoses from the oil pump, Figure 1. Fasten the hoses in a raised position to prevent oil drainage. 3. Remove the drive belt from the pump pulley by loosening the pump support bracket bolts. 4. Remove the pump support bracket bolts and lift the pump and the support bracket off as an assembly. B. Disassembly 1. Drain the remaining oil from the pump, then seal the pressure and the return line ports to prevent dirt from entering. Clean the outside of the pump and the reservoir. Mount the assembly in a vise by clamping the support bracket. 2. Unhook the filter element retaining spring and lift the spring and filter element from the reservoir, Figure 8. 3. Remove the oil rsservch rrtaiairg l\.'.t, then lift the filter r feinert suprorf; plists, reinforcement plate and reservoir from the oil pump housing. Remove the pump intake and reservoir retain ing bolt "O" rings from the pump housing. 4. Remove the bolt and the washers from the end of the pump shaft, then remove the pulley and Woodruff key. IMPORTANT: Do not hammer on the pump shaft to free the pulley. 5. Loosen the two bolts and lock washers which secure the pump cover to the pump body. 6. Remove the three nuts, lock washers, and spacers that secure the pump support brackets to the pump body. Separate the pump from the brackets and remove the brackets from the vise. 7. Remove the two bolts and lock washers and the three mounting stud nuts that hold the cover to the pump body and separate the cover from the body. COVER"CLAMP COVER GASKET HOSE CONNECTIONS OUTlEr FITTING "O". RING SEAL FLOW CONTROL VALVE SPRING ORIFICE PLATE SNAP RING `"'" PRESSURE RELIEF k, B; *'s PRissllRE RELIEF fc .;-. valve spring 'FLOW CONTROL VALVE wsmm j, RETAINING - Ik .BOlT ; S FILTER ELEMENT SUPPORT PLATE RHNFORCEMENT PLATE OIL RESERVOIR gaskets' PUMP PULLEY 1 \ DRIVEN V ROTOR PUMP COVER' \ "O" ring" pump'V BEARING _*S, BODY \ : * BEARING retainer STUD RETAINER cup Figure 8--Rotor-Type Oil Pump--Disassembled 308 Chapter 1 -B--Power Steering--Row Crop Tractors 8. Remove the cover gasket from the groove in the body. 9. Lift the flow director "O" ring out of the bore in the pump body. 10. Remove the oil pump rotors and drive the key from the drive shaft IMPORTANT: Handle the rotors, shaft, pump body, and cover carefully as nicks, burrs, cracks, or scratches may render them unfit for further service. 11. Mount the pump body lightly in a vise with soft jaws, then remove the rotor shaft bearing re tainer clip with a screwdriver. 12. Carefully Press or tap the rotor shaft and bear ing from the pump body. Check both parts for excessive wear or other damage. If replacement is necessary, press the bearing off the shaft using an arbor press and an adapter which will bear against the bearing inner race, Figure 9. 13. Inspect the rotor shaft oil seal for wear or dam age. If defective, use a punch to remove it from pump body. 14. Mount the pump cover in a vise equipped with soft metal jaws, then thread the oil pump outlet fitting out of the pump cover. Remove the "O" ring from the fitting. 15. Remove the flow control valve spring nnrf the orifice plate from the pump cover. 16. Using a wire as shown in Figure 10, carefully pull the control valve out of the pump cover. 17. Remove the snap ring that secures the pressure relief valve and spring in the flow control valve. Remove both the valve and the spring. IMPORTANT: Handle the vedves carefully to prevent damage. C. Cleaning, Inspection and Repair 1. Wash all the parts except the rotor shaft bearing in a solvent Air dry all parts. 2. Inspect the oil pump body and the cover for wear by the rotors. Check the bushings in the body and the cover for wear or scores. If the pump body or bushing is defective, replace both the pump body and the rotor sub-assembly. If the pump cover or bushing is defective, replace the pump cover. 3. Inspect both rotors for wear, cracks, or scores. If either rotor is defective, replace the entire assem bly including the pump body. If the rotors are in good condition, proceed as follows: a. Tap the bearing assembly into the pump body until the bearing is seated in the body. NOTE: Apply pressure to the outer race of the bearing when installing it in the pump body. b. Install the drive rotor and the driven rotor. Check the clearance between the rotors, at all points, with a feeler gauge as shown in Figure 11. If the clearance exceeds 0.006 inch, re place the pump body and rotor assembly. fprr: 9/16" Socket BEARING ' , fr..' MAFT V `"I. * "-''if: , SEARING" ` REMOVAL INSTALLATION T-,9S3 Figure 9--Rotor Shaft Bearing Replacement Figure 10--Pump Flow Control Valve Removal Section 3--Power Steering Pump--Rotor Type 309 c. Check the clearance between the top of the rotors and the surface of the pump body with a feeler gauge and a straight edge as shown in Figure 12. If the clearance exceeds 0.0025 inch, replace the pump body and rotor assembly. d. Check the clearance between the driven rotor and the insert in the pump body as shown in Figure 13. If the clearance exceeds 0.008 inch, replace the pump body and the rotor assem bly. If all the clearances are within specifica tions, remove the rotors and bearing from the pump body. e. Dry the pressure relief valve and the bore of the flow control valve thoroughly. Insert the relief valve in the bore, then shake the valve. If the relief valve does not move freely in the bore, remove it and check for burrs. Remove the burrs with a crocus cloth. Check the flow control valve for free movement in the bore of the pump cover. Remove burrs with a crocus cloth. f. Check the tension of the flow control valve spring with an engine valve spring checking tool. The spring should exert a pressure of 16 pounds, plus or minus IV2 pounds, when com pressed to a height of 11%4 inches. Replace thj spring if it does not meet these specifications. g. Check the tension of the pressure relief valve spring. The spring should exert a pressure of 22 pounds, plus or minus 1 pound, when com pressed to a height of 1%6 inches. Replace the spring if it does not meet these specifications. D. Assembly 1. Coat all parts with parts with M2C41 Hydraulic Oil, prior to assembly. 2. If the rotor shaft oil seal was removed, check the seal bleed hole for obstructions, then install a new seal as follows: Coat the lip of the seal with Lupriplate or equivalent. Position the seal in the bore of the pump body with the lip toward the rotors. Use a socket wrench that will bear on the outer diameter of the seal and drive it in until firmly seated. 3. Press the rotor shaft bearing onto the rotor shaft, as shown in Figure 9, until the bearing is seated against the shoulder on the shaft. Tap the rotor shaft and bearing assembly into the pump body until it is seated. Install the bear ing retainer clip. 4. Position the pin on the shaft and install the drive rotor. Then, install the driven rotor. 5. Install a new "O" ring seal on the hose adapter fitting, then thread the fitting into the pump cover. Tighten it to 40-45 ft lbs. torque. 6. Position a new pump cover gasket in the groove in the pump body. Install a new "O" ring seal around the flow bypass hole and retainer in the pump body. 7. Position the cover on the pump body and install lock washers and bolts in the two holes closest to the reservoir mounting pad. Tighten them to 20-25 ft lbs. torque. 8. Install the three stud nuts that secure the pump cover to the pump body. Tighten them to 20-25 ft lbs. torque. Figure 72--Checking Rotor to Pump Body Clearance 310 Chapter 1 -B--Power Steering--Row Crop Tractors plate and secure with the retaining spring and spring seat 16. Install a new gasket in the reservoir cover and position the cover on the reservoir. Install the clamp but do not tighten securely. E. Installation 1. Position the pump and the pump adjusting bracket on the pump mounting bracket and secure with the flat washers, lock washers, and nuts. Tighten the nuts to 25-30 ft lbs. torque. 2. Install the drive belt around the pump pulley. Raise the pump assembly to tighten the belt to obtain % inch deflection at a point midway be I ? Figure 13--Checking Rotor to Insert Clearance tween the pulleys under 15 to 20 lbs. pressure. When the proper tension is obtained, tighten the pump bracket stud nuts to 20-30 ft lbs. torque. IMPORTANT: Check the rotor shaft oper ation to make sure it turns freely without binding. If the shaft does not turn freely, disassemble the pump to determine the cause. 9.Insert the pressure relief valve spring and the pressure relief valve into the bore of the flow control valve and install the snap ring. 10. Insert the flow control valve into the bore of the pump cover. Be careful not to damage the valve lands or the bore of the cover. Position the orifice plate and the flow control valve spring on the valve. 11. Install the three spacers and the pump support bracket on the studs and secure with the three lock washers and nuts. 12. Place the key in the keyway, install the pump pulley, and secure with the fiat washer, lock washer, and cap screw. Tighten the cap screw to 18-20 ft lbs. torque. 3. Attach the pump return hose to the reservoir and tighten the hose clamp. 4. Attach the pump pressure hose, Figure 1, to the pump pressure port fitting. Tighten the connec tion to 30-35 ft lbs. torque. IMPORTANT: Make sure both hoses are at tached to the proper pump port. If reversed, the system will not operate properly. 5. Prior to filling the pump reservoir, and with the engine not operating, turn the tractor wheels to the left as far as possible to retract the piston in the cylinder. Remove the cover and fill the reser voir to within s/s inch of the top with M2C41 Hydraulic OiL Replace the cover and bleed the system as follows: a. Start the tractor engine, but do not accelerate. b. Operate the power steering system by slowly turning the steering wheel from one extreme to the other. Do not hold against stops. 13. Place the pump support bracket in a vise, then position the new gaskets on the oil reservoir mounting pad at the top of the pump body. 14. Place the oil reservoir on die pump body, then position the reinforcement plate over the pump intake port inside the reservoir. Lugs on the reinforcement plate should be up. 15. Install the filter element support plate and the l reservoir retaining bolt Tighten the bolt secure ly. Position the filter element on the support c. Hapeat the ofrsfreg <. /cle until the system is free of air. Air is present when there is e turbulence or boiling action in the reservoir during the steering operation. d. Check the hose connections for possible oil leakage or intake of air. e. Turn the tractor wheels to. the left and stop the engine. Refill the reservoir to within s/a inch of the top. Install the cover and clamp it securely. ! fc Section 4--Steering Gear 311 4. STEERING GEAR A. Removal 1. Disconnect the battery ground cable from the steering gear housing and battery bracket, Figure 14. 2. Remove the steering wheel nut and emblem and lift the steering wheel from the steering column. If necessary, use a wheel puller. 3. Remove the spring, packing and spring seat from the top of the steering column. 4. Disconnect the throttle rod link from the bell crank and remove the two bolts which secure the throttle lever bracket to the transmission, Figure 15. 5. Remove the cotter pin, washer, spring and throttle arm from the throttle lever. Withdraw the lever from the instrument panel. 6. Remove the taillight wire and the transmission oil warning light cable from the clip on the steer ing gear housing. 7. Disconnect the P.T.O. handle from the hood side panel (Select-O-Speed models only). 8. Disconnect the selector assembly (Select-OSpeed models only) as follows: a. Loosen the nut securing the selector cable to the transmission cover. b. Remove the four screws attaching the selector assembly to the hood. c. Move the selector lever to the tenth speed position and disconnect the upper selector cable from the lower cable. d. Disconnect the wires to the safety switch and to the selector lamp. 9.Disconnect the Proof-Meter cable at the instru ment panel. 10. Disconnect the oil pressure line at the instrument panel. 11. Remove the four screws and the four bolts and lock washers from the hood rear side panels. 12. Remove the two screws and the four bolts and lock washers from the instrument panel. 13. Remove the generator regulator from the bracket on the steering column. Figure 16. 14. Disconnect the wires from the junction block mounted on the steering column bracket. Mark the wires to insure proper installation. 15. Disconnect the temperature gauge wire from the clip on the fuel tank mounting frame. 16. Slide the instrument panel over the top of the steering column and set it on top of the hood. 17. Remove the bolt which secures the battery mounting bracket to the steering column. 18. Remove the headlight switch from the rear hood panel. Figure 14--Steering Gear Installed Figure IS--Throttle Linkage Installed 312 Chapter 1-B--Power Steering--Row Crop Tractors 5. Remove the bushing from the cover using a suitable puller. 6. Remove the sector shaft and the thrust washer from the steering gear housing. 7. Remove the end cover and lock plate as an as sembly by removing the four bolts and lock washers. 8. Disassemble the end cover by removing: a. Adjusting screw lock nut, Figure 23. b. End play adjusting screw. c. Adjusting lock plate bolt and washer. d. Backlash adjusting lock plate. e. Splined steering gear backlash adjuster, Fig ure 17. f. "O" ring (1955 and 1956 models only). Ml 9. Remove the steering gear worm bearing thrust washer, Figure 17, from the bottom of the Figure 16--Steering Column with Hood Side Panel n Removed housing. Then, remove the steering shaft and worm, and the eccentric lash adjuster sleeve as an assembly. 19. Remove two bolts from the rear hood panel and 10. Remove the eccentric sleeve and the thrust i1 j` lift the panel off. bearing from the shaft and worm assembly. 20. Remove the cotter pin and castellated nut which 11. Remove the steering column bearing, Figure 17, secures the drag link end to the Pitman arm and from the top of the steering column. disconnect the drag link from the arm, using a puller. 21. Remove the four bolts that secure the steering C. Steering Gear Cleaning, Inspection, and Repair gear housing, Figure 14, to the transmission case 1. Inspect the sector shaft bushings for signs of and lift the steering gear from the tractor. wear. If replacement is necessary, use a puller to remove them from the housing. B. Disassembly 1. Remove the filler plug, Figure 17, from the top of the steering gear housing and drain the oil. 2. Remove the Pitman arm and felt seals from the sector shaft Use a puller, if necessary. 3. Remove the steering gear housing side cover as follows: 2. Inspect the worm and the sector gear teeth for excessive wear or damage. Replace if defective. 3. Check the eccentric lash adjuster sleeve and the thrust bearings for wear, burrs, cracks, or other defects. Replace as necessary. 4. Examine the steering column bearing for wear, distortion, or other defects. Replace if damaged. a. Remove the three bolts and lock washers, Figure 17. b. Remove the stud nut and lock washer. c. Remove the nut, lock washers, and packing from the adjusting screw. cL Turn the adjusting screw clockwise until the cover is free to slide out of the housing. e. Remove the adjusting screw from the slotted end of the sector shaft. 4. Remove the "O" ring from the cover. D. Assembly 1. Install the bearing at the top of the steering column. 2. Install the two sector shaft bushings in the steer ing gear housing. 3. Install the eccentric lash adjuster sleeve and the thrust bearing on the worm and shaft Then, install the entire assembly in the housing from the bottom. Position the eccentric lash adjuster sleeve so that the opening in the sleeve will - * i-t Section 4--Steering Gear 313 > LOCK NUT r-ADJUSTING SCREW GASKET SEAL -SPRING --SPRING SEAT !------ BEARING ASSEMBLY SHAFT FILLER PLUG COVER BUSHING SECTOR SHAFT THRUST WASHER <t- HOUSING THRUST BEARING ASSY. PITMAN ARM ECCENTRIC SLEEVE WORM THRUST BEARING ASS'Y. THRUST WASHER----ADJUSTING SCREW LASH ADJUSTER GASKET COVER LOCK PLATE LOCK NUT LOCK PLATE BOLT Figure 17--Steering Gear--Disassembled T-1936 314 Chapter 1-B--Power Steering--Row Crop Tractors allow tiie sector gear teeth to mesh with the worm gear. The approximate position of the sleeve is shown in Figure 18. Place the steering gear worm bearing thrust washer into the eccen tric sleeve. 4. Assemble the end cover by installing the splined lash adjuster, lash adjusting lock plate and lock ing bolt, the adjusting screw and lock nut, and a new "O" ring (1955 and 1956 models only), Figure 17. Do not tighten the locking bolt and lock nut at this time. 5. Position the end cover on the housing so that the splines of the lash adjuster mesh with the splines of the eccentric sleeve, then secure the cover to the housing with four bolts and lock washers. Notice the position of the locking bolt in the lash adjusting lock plate slot to make sure it is approximately midway in the slot. This is im portant. After the backlash adjustment there should be approximately %6 inch between the bolt and the end of the slot This provides for further adjustment to compensate for wear. NOTE: Subsequent adjustments will narrow the space. Figure 18--Eccentric Sleeve and Lock Plate Splines Figure 19--Checking the Worm Bearing Preload 6. Install the steering column bearing seat, spring and felt. Position the steering wheel and emblem on the shaft and secure with the steering wheel nut. Use a piece of twine and Pull Scale 3600-E to check the preload on the worm bearings by rotating the steering wheel, as shown in Figure 19. Preload should be 4% to 9 inch lbs. torque with the steering shaft positioned three turns to right or left of straight-ahead position. This is equiv alent to 5 to 10 lbs. pull when checked as shown in Figure 19. Adjust the preload by turning the adjusting screw, Figure 23, in or out as neces sary. Tighten the lock nut and recheck the pre load to be sure it has not changed. 7. Set the steering gear shaft and worm assembly in the straight-ahead position. This can be done by observing the worm through the side cover opening and turning the steering wheel until the widths of the lands at the end of the worm are approximately the same at the casting marks as shown in Figure 20. 8. Install- ir.s thrust .'asher on the sector s;:aft, then install! the- sector shaft in the housing r.j that the middle tooth of the sector gear engages the center groove of the worm as shown in Figure 21. 9. Install a new bushing in the side cover. 10. Position a new "O" ring on the cover and attach the cover to the housing with three bolts, one nut, and four lock washers. 11. Install the packing, washer, adjusting screw, and lock nut in the side cover. Do not tighten the lock nut Section 4--Steering Gear LAND WIDTHS APPROX. THE > ' SAME AT CASTING MARKS 315 ADJUSTING SCREW ' T-1934 Figure 22--Adjusting Sector Shaft End Pfay Figure 20--Positioning Worm and Shaft to the Straight-Ahead Position 12. Adjust the sector shaft end play as shown in Figure 22. Using the Pitman arm for leverage, rotate the shaft back and forth while tightening the adjusting screw. Proper adjustment exists when there is no perceptible end play and the shaft does not bind. 13. Adjust the steering gear backlash as follows: a. Loosen the bolt so that the lash adjusting lock plate is free to rotate. Figure 23. b. Attach twine and Pull Scale 3600-E to the steering wheel, as shown in Figure 24. c. Move the lock plate, a little at a time, in a clockwise direction until a reading of 16 to 26 pounds is obtained when the steering wheel is turned through its tightest area with a pull scale. This reading is equal to 15 to 22 inch pounds which is the proper adjustment d. Tighten the lock plate bolt and recheck the backlash setting. E. -Installation 1. Using a new gasket, position the steering gear housing on the transmission case and secure with four bolts and lock washers. Figure 21--Sector Gear Properly Engaged with Worm T-1931 Figure 23--End Cover Lack Plate and Locking Bolt 316 Chapter 1 -B--Power Steering--Row Crop Tractors 2. Install the Pitman arm on the sector shaft and secure with the lock washer and nut. Tighten the nut to 140-160 ft lbs. torque. 3. Attach the drag link end to the Pitman arm with a castellated nut and cotter pin. 4. Attach the taillight wire and the transmission oil warning light cable to the clip on the steering gear housing side cover. 5. Install the bolt attaching the battery mounting bracket to the steering column. 6. Install the rear hood panel with two bolts and lock washers. 7. Attach the headlight switch to the rear hood panel. 8. Slide the instrument panel into position on the steering column. 9. Attach the temperature gauge wire to the clip on the fuel tank mounting frame. 10. Attach the wires to the junction block on the steering column bracket 11. Install the generator regulator on the steering column bracket 12. Remove the steering wheel, install the instrument panel over the steering shaft and secure with the two screws, four bolts, and six lock washers. 13. Connect the P.T.O. cable conduit and attach handle to the hood side paneL (Select-O-Speed models only). 14. Attach the oil pressure line to the instrument paneL 15. Install die selector assembly (Select-O-Speed models only). 16. Attach the Proof-Meter cable to the Proof-Meter. 17. Secure the hood side panel with four screws and four cap screws and lock washers. 18. Position the throttle lever in the instrument panel and install the throttle arm, spring, washer and cotter pin. 19. Attach the throttle rod link to the throttle rod arm and to the bellcrank, and install the two bolts which secure the throttle lever bracket to the transmission. 20. Install the packing, spring seat, and spring, at the top of the steering column. 21. Position the steering wheel on the shaft and secure with the nut and washer. 22. Attach the battery ground cable to the steering gear housing. 23. Fill the steering gear with 1 Vi pounds of gear lubricant SAE 90 (summer) or SAE 80 (winter). Install the filler plug. 5. POWER CYLINDER AND CONTROL VALVE ASSEMBLY A. Removal 1. Disconnect the pressure hose and the return hose at their control valve connections. Figure 1. Raise the hoses above the pump reservoir level and secure in this position to prevent oil drainage. 2. Turn the front wheels from one extreme position to the other several times to force all the oil from the power cylinder and the control valve assembly, then plug the control valve oil line ports. 3. Loosen the nut which clamps the control valve sleeve to the front end of. the drag link. Section 5--Power Cylinder and Control Valve Assembly 317 WASHER ' r* WASHER STAMPED LOCK NUT / NUT / SNAP RING WkW'P DUST SEAL NUT / ,j _____ RETAINER INSULATORS SCRAPER m ,,,, *-- OIL SEAL fv SPACER CFi! SEAL VALVE SPOOL ~ ft/iTrS ^ RETAINER"' / valve sp BOLT POWER CYUNDER CHECK VALVE ASSEMBLY ,,/ "O" RING / SEALING PLUG--jT CONTROL VALVE j HOUSING STOP PIN BALL STUD DUST SHIELD ' V.'- > Figure 25--Control Valve and Power Cylinder--Disassembled 4. Remove the cotter pin and the castellated nut that attaches the drag link to the control valve bail Ttud, Figure 2. Use Gear Puller 1002, to -.aniov f the drag link from the ball stud. ifOTE: Place a hex nut over the point end of the gear puller to protect the ball stud during this operation. (The ball stud is not provided with a point locating hole.) DO NOT remove the drag link from the ball stud, in any man ner other than specified. The use of leverage tools applied to-the sleeve assembly or to the ~ valve housing as a fulcrum for the drag link removal can cause extensive internal damage to these assemblies. 5. Remove the cylinder piston rod from the side rail support by removing the locking nut, jam nut, two washers, and two insulators. 6. Remove the power cylinder and control valve assembly from the front steering arm by remov ing the locking bolt and washer. B. Control Valve Disassembly 1. Place the cylinder and control valve assembly in a vise, equipped with soft jaws, so that the vise grips the power cylinder just ahead of the control valve housing. 2. Loosen the three retaining bolts until the control' valve assembly can be removed from the power 318 Chapter 1 -B--Power Steering--Row Crop Tractors cylinder. Plug the ports in the power cylinder to prevent the entry of dirt 3. Place the control valve in a vise and remove the lock nut from the control valve spool bolt, Fig ure 26. This will permit the control valve sleeve and flange assembly to be removed from the valve control housing, Figure 26. NOTE: Care should be taken not to allow the plate and spacer to slide off the spool bolt when the sleeve assembly is removed from the valve housing. 4. Remove the retainer and the seal from each end of the valve housing and slide the valve spool out from the cylinder end. It should be noted that the cylinder end of the spool has a larger OD. than the sleeve end. 5. Remove the sealing plug from the cylinder end of the valve housing by forcing it out with the short end of a %2" Allen wrench inserted through the oil hole in the top of the housing Figure 26. 6. Use a screwdriver, inserted in the sealing plug bore, to remove the check valve assembly, Fig ure 25. 7. Place the control valve sleeve and flange assem bly in a vise and remove the dust shield from the top of the sleeve at the ball stud, Figure 27. 8. Pull the valve spool bolt and the stop screw out until the ball stud is against the elongated slot of the sleeve. Then, remove the stop pin from the stop screw, Figure 27. 9. Remove the stop screw from the ball stud re tainer by turning it counterclockwise. Then, slide the stop screw from the valve spool bolt 10. Remove the stop plug ball socket spring and one ball stud seat from the ball stud retainer. 11. Slide the ball stud and retainer toward the closed end of the sleeve, then remove the ball stud from the sleeve by dropping it into the retainer and out the open end. 12. Remove the retainer and the remaining ball stud seat C. Control Valve Inspection, Cleaning and Repair 1. Clean and dry all parts thoroughly and inspect for wear or damage. Replace defective parte. 2. Replace all seals whenever the power cylinder or control valve has been disassembled. Also examine the retainer for damage. 3. Check the valve spool and the control valve housing for burrs and scores. Remove burrs with a crocus cloth. IMPORTANT: Do not round off the sharp edges of the valve spool. This can prevent the valve from operating properly. Figure 26--Control Valve with Sleeve and Flange Assembly Control Valve Removed Section 5--Power Cylinder and Control Valve Assembly 319 4. Position the control valve housing with the cyl inder end up, then insert the sleeve end (small OJD.) of the valve spool. The valve spool should slide into the housing freely of its own weight The specified clearance is 0.0002 to 0.0005 inch. 5. Install the relief valve assembly in the sealing plug bore of the control valve housing, using a screwdriver. 6. Install a new "O" ring on the sealing plug and push the plug into position in its bore in the control valve housing. 7. Inspect the mating surfaces of the ball stud re tainer and the sleeve for freedom from burrs, nicks, or other damage. Make sure the retainer slides freely in the sleeve. D. Assembly of Control Valve 1. Make sure every part is clean, then lubricate with M2C41 Hydraulic Oil. 2. Position one half of the ball stud seat at the closed end of the ball stud retainer, then insert the retainer into the sleeve and flange assembly. 3. Install one of the three retaining bolts through the top of the flange on the sleeve and flange assembly. NOTE: This bolt cannot be inserted after the ball stud is installed. 4. Insert the ball stud, threaded end first, through the open end of the ball stud retainer and lift the threaded end up through the elongated slot in the sleeve and flange assembly. 5. Position the remaining half of the ball stud seat in the rete'ner, followed by tbs 'spring and c't? .-luc wi head of plug ia'fitrd the >pen end of tubes, as snown in Fip'^re 25. IMPORTANT: Make sure that the btdl stud seats are properly aligned in the retainer. 6. Insert the valve spool bolt through the stop screw. Then, install the stop screw in the re tainer. Tighten the stop screw securely, then back it off until the nearest hole in the screw is aligned with the hole in the valve spool bolt head. 7. Install the stop pin through the stop screw and the valve spool bolt NOTE: Make sure the pin does not extend beyond the edge of the stop screw on either side. 8. Bend the edges of the dust shield together slightly to improve the fit, then install, with short side toward the flange, over the elongated slot in the sleeve assembly. 9. Coat the valve spool with M2C41 Hydraulic Oil and insert it through the opening at the cylinder end of the control valve housing, with the small est OX), of the spool toward the sleeve and flange assembly. 10. Install a new seal at each end of the valve spool with the cup side in. Make sure the seal with the largest 113. is positioned at the cylinder end of the valve housing. IMPORTANT: Be careful not to nick or scratch the seals during instcdlation. This is important to prevent leakage during oper ation of the system. 11. Install the seal retainers. 12. Check the valve spool for free movement in the housing. 13. Position the control valve stop washer around the valve spool into the counterbore in the sleeve and flange assembly. 14. Position the valve spool spacer on the valve spool bolt and against the stop screw. 15. Position the sleeve and flange assembly on the valve housing by inserting the valve spa.' bolt completely through the bore of the cssesa ?d control valve spool. Make certain that the ccjiterbore in the flange locates on the pilot in the valve housing. Since the top retaining bolt has already been installed through the top of the flange, it will have to be positioned simulta neously through the top bolt hole in the control valve housing. When thus positioned, the retain ing bolt should be aligned with the pressure and return ports in the valve housing and with the ball stud in the sleeve and flange assembly. 320 Chapter 1-B--Power Steering--Row Crop Tractors 16. Install the retaining lock nut on the cylinder end of the valve spool bolt Tighten the nut to seat the parts solidly, then back it off approximately one-half turn to allow the valve spool to rotate freely with a minimum amount of end play. 17. Install the two remaining retaining bolts through the sleeve and flange assembly and through the control valve housing. E. Power Cylinder Disassembly, Inspection and Repair The design of the power cylinder does not provide for repair of the piston or the piston rod. If internal failure occurs, the complete unit must be replaced. However, seals and other external parts can be re placed if worn or damaged. 1. Clean dirt from the cylinder assembly and clamp the assembly in a vise. 2. Remove the snap ring Figure 25, from the rod end of the cylinder. 3. Pull the piston rod outward to remove the scraper and the dust seal, Figure 25. 4. Apply compressed air to one of the two ports in the end of the cylinder to blow the spacer and oil seal from the rod end of the cylinder. If this is not successful, use a pointed instrument to pry out the spacer and oil seal. 5. Examine the dust seal and oil seal for wear or damage. Replace if defective. 6. Lubricate the new oil seal, then install the seal (cup toward piston), spacer, dust seal, and scraper in the rod end of the power cylinder using a inch deep wall socket. 7. Install the snap ring F. Assembly and Installation of Power Cylinder 1. Use new "O" rings at the two oil transfer ports in the control valve housing. 2. Clamp the power cylinder in a vise. Position the control valve on the end of the cylinder, lining up the transfer ports, and secure with the three retaining bolts. Tighten them to 35-50 ft. lbs. torque. 3. Install the power cylinder and the control valve assembly as follows: a. Raise the tractor front end to free the wheels, then align the front steering arm vertically as shown in Figure 28. Figure 28--Adjustment of Power Cylinder and Control Valve to Steering Arm Section 5--Power Cylinder and Control Valve Assembly 321 b. Insert the power cylinder front stud into the front steering arm and secure with the lock washer and bolt Torque to 40-50 ft lbs. c. Install the inner insulator washer and the in sulator on the cylinder piston rod so that the washer bears against the rod shoulder. NOTE: The inner insulator washer has an l.D. of 0.515 to 0.525 inch. The outer washer has an l.D. of 0.464 to 0.474 inch. d. Position the cylinder piston rod through the hole in the side rail rod support and install the insulator and the outer insulator washer. e. Secure the rod to the support with a nut tightened to 20-25 ft lbs. torque. Lock the nut in position with the hex stamped nut. Torque to 12-16 ft lbs. 5. Adjust the distance from the center of the ball stud in the sleeve and flange assembly, to the center of the ball stud in the steering arm by rotating the cylinder and control valve assembly. The distance between these centers should be 5Vs" as shown in Figure 28. NOTE: The face of the control valve housing containing the oil ports must be at the top and on a horizontal plane when this adjust ment is completed. 6. After proper adjustment is obtained, tighten the nut which secures the control valve sleeve to the drag link front end. 7. Install the pressure hose and the return hose to the ports at the top of the control valve. The return hose (attached to reservoir) should be attached to the rear port. 8. Turn the tractor steering wheel to align the hole at the front end of the drag link with the control valve ball stud in the sleeve and flange assembly. Attach the drag link to the ball stud with a castellated nut and cotter pin. Tighten the nut to 75-90 ft lbs. torque. NOTE: Make sure that the ball stud is kept in a vertical position when connecting it to the drag link. 9. The length of the assembled drag link should be 44% inches from the ball stud to ball stud as shown in Figure 29. Adjustment is made by loosening the sleeve clamp nuts and turning the screw-type sleeve to lengthen or shorten the drag link as required. Tighten the clamp nuts after adjustment has been made. 10. Replenish the system with hydraulic fluid as described on page 310. Figure 29--Drag Link Adjustment 322 Chapter 1 -B--Power Steering--Row Crop Tractors 6. TROUBLE SHOOTING See Chapter 1-C Page 338. 7. SPECIFICATIONS Pump Capacity.............................1.5 gpm @ 900 rpm and 600 psi Type ..........................................................................................Rotor Drive...........................................................................................Belt Maximum Operating Pressure.................................1100 psi Cylinder Type................................................................. .Double Acting Torque Limits Ft. Lbs. Pump Flow Control Valve Fitting............................... 40-45 Pump Cover toPump Body Bolts.................................20-30 Belt Adjusting Bracket to Pump Body Stud Nuts.................................................25-30 Pump Pulley Retainer Bolt............................................18-20 Belt Adjusting Bracket to Pump Support Bolts......................................................25-30 Hose to Pump Pressure Fitting Valve Assembly to Power Cylinder Retaining Bolts ...................................................................................35-50 Cylinder Rod Retainer Nut............................................20-25 Cylinder Rod Support Bracket to Side Rail Bolts (3).............................................................135-150 8. SPECIAL TOOLS Removal and disassembly of the power steering components on "Row Crop" tractors can be accomplished without the use of special tools. However, it will be helpful to use Puller 1002 from the FT-48 Kit to dis engage the power cylinder stud from the front steering arm. Part THREE STEERING, FRONT AXLE, BRAKES, WHEELS, AND TIRES Chapter 1-C Power Steering--Industrial Tractors Section Page 1 Construction and Operation .................................................................................................................................................... 323 2 Power Steering Pump................................................................................................................................................................... 327 3 Power Cylinder and ValveEnd Assembly.......................................................................................................................... 329 4 Actuator Housing .......................................................................................................................................................................... 334 5 Control Cable and Conduit Assembly.................................................................................................................................. 336 6 Trouble Shooting .......................................................................... 338 7 Specifications.................................................................................................................................................................................... 340 8 Special Tools..................................................................... 340 1. CONSTRUCTION AND OPERATION The power steering information given in this chapter applies only to "Industrial" tractors. For information on other models, refer to pages 282 to 300 ("General Pur pose" tractors), or pages 301 to 322 ("Row Crop" tractors). Power steering components of the "Industrial" tractor consist of four assemblies: Pump and Reservoir Assem bly, Cylinder and Valve End Assembly, Actuator Hous ing, and Control Cable and Conduit Assembly, Figure 1. The' entire steering system is actuated hydraulically. There is no mechanical operating linkage between the steering wheel and the front wheels. A description of the design and function of each assembly plus complete overhaul instructions is given in the various sections of this chapter as outlined above. A. Power Steering Pump All "Industrial" tractors are equipped with a roller vane type pump located at the front right side of '-><e engine. The pump is belt driven from the engine crankshaft A tumbuckle attached between the pump support bracket and the fuel tank bracket adjusts belt tension. The pump consists chiefly of a six-lobed carrier, Figure 5, which is keyed to the pump drive shaft and which rotates within a cam ring installed in the cast iron pump body. Six hollow rollers are located be tween the lobes of the carrier and act as vanes within the cam ring as they are driven by the carrier. The drive shaft is supported at each end by bronze bush ings pressed into the pump body and into the pump cover. A lip-type, spring-loaded oil seal is installed be tween the bushing and the pulley at the outer end of the shaft As the pump shaft and carrier rotate, the clearance volume of pockets formed between the carrier lobes and cam ring increase in size, then decrease in size to propel oil from the suction (intake) side to the pressure side of the pump. Minimum output of the pump (at engine idle speed) provides sufficient hy draulic power to turn the front wheels. The oil reservoir is attached to the top of the pump by an open center stud, Figure 5, which threads into the pump body. This stud is used also to attach, in side t;: 2 reservoir, the support brack*!' for ,% replace able Hter element. A spring-loaded hoai, installed through the center of the element and the stud, holds the element in place on the support Should the filter become clogged, the spring seat acts as a relief valve, allowing oil to bypass the filter. During operation, oil flows from the return line through the filter element to the reservoir. Oil enters the pump through an opening at the bottom of the reservoir. To keep the 323 324 Chapter 1-C--Power Steering--Industrial Tractors ^A**^***^^ "t:,* - .a . V . .V V->v>A4 v'v '.Si- .. **. j*'** v^* '.Vy?r*-.'* *'<? r' *` ' ' -v> *(. *>'- ,\ .< `` - .- -.v: >. i-XU.j^'-i..'.;.!.--''. ' "-- ' -* Nf rt _'*' ; ^t c* * Figure J--Power Steering System Components ,, e -.-'.-V*r>- system oil temperature down, the oil is circulated through a tank in the base of the tractor radiator. The oil level should be maintained to within % inch of the top of the reservoir. A spool-type, spring-loaded flow control valve, Fig ure 8, mounted in the bore of the pump cover, is de signed to limit oil flow to a maximum of 9.5 gallons per minute. The control valve, which is hollow and closed at one end, has metered holes located in the valve grooves. "Wl ^nev ;r pump volume is greater than is permitted b die m tered holes, a pressure k, built up at die back of the valve. This forces the valvs toward the pump intake port and relieves the excess volume. A spring-loaded, pressure relief valve, with a cali brated orifice at its head, is mounted inside the flow control valve. It functions to limit the pump pressure to a maximum of 1550 psi. When pump pressure reaches 1300 psi, a ball in the relief valve is unseated and the pressure is relieved through the calibrated orifice. When the pressure is relieved, the control valve will move toward its spring and oil will return to the intake side of the pump in the same maimer as when the flow control valve is operating to limit flow only. B. Cylinder and Valve End Assembly The cylinder and valve end assembly is mounted directly behind the front axle, Figure 10. The rod-end of the cylinder is attached to the axle and the oppo site end k attached to the right steering arm. The coti-rol valve is located betw ;en the operating stud and the inner tube assembly. The rod end of the assembly is a double walled tube containing a piston and a rod. Two oil passages interconnect the inner tube of the cylinder with die control valve. These passages serve as either pressure lines or return lines in directing oil to or from either end of the cylinder, depending on the turn being made. The control valve assembly consists of the valve housing, valve spool, spool guide, spacer tube, and operating stud, Figure 13. m Section 1 --Construction and Operation 325 In operation, oil is directed from the pump to the The actuator cable is threaded into the actuator control valve through the connecting hose and tubing. housing and engages the actuator wheel. Movement When the steering wheel is turned, the actuator cable of the cable is limited by a cable stop, housed in the moves the operating stud to which it is attached. The tube at the valve end of the cable. When the cable stud, in turn, moves the control valve spool which reaches the end of its travel, the friction washers slip directs oil, under pressure, to one side of the piston on the actuator wheel bushings. Thus, any further or the other, depending on the turn being made. Oil turning of the steering wheel and shaft in the same from the opposite side of the piston is forced out and direction will not transmit movement to the cable. back to the pump reservoir via the oil cooling seg ment of the tractor radiator. When the turning action of the steering wheel is stopped, the cylinder travels about 0.008 inch further and comes to rest at the neutral position with respect to the valve. D. Straight-Ahead Driving When the tractor front wheels are positioned straight ahead, the control valve spool will be in its center or neutral position, Figure 2. In this position, oil from the pump flows past the valve spool lands C. Actuator, Cable, and Steering Assembly The steering efforts of the operator are transmitted and is returned to the reservoir. Thus, the oil will simply be recirculated without doing any work. to the control valve through the mechanical control linkage of the steering wheel, steering shaft, actuator E. Left Turning assembly, actuator cable assembly, and reduction Turning the steering wheel to the left causes the housing on late model tractors. actuator and cable assembly to move the control The actuator assembly is mounted in the location valve operating stud to the right. This moves the usually occupied by the conventional steering gear. valve spool toward the right end of the cylinder and The actuator housing contains the steering shaft oper permits oil, under pressure, to be directed to the right ated by the steering wheel. The actuator wheel, which side of the piston, Figure 3. Since the piston rod on is mounted on the lower end of the shaft, Figure 19, the left side of the piston is attached in a stationary is splined to two actuator wheel bushings. The wheel position to the axle, the cylinder, attached to the bushings are driven by frictional washers which are right steering arm, is moved to the right, causing the held in contact with the wheel bushings by a com tractor to turn left. 1/ & pression spring. The compression of the spring is When the wheels are fully turned, a stop on the adjusted by a self-locking nut threaded to the bottom actuator cable engages a stop in the slider tube assem 'K of the shaft The steering shaft is held in a centered bly. This engagement causes the friction washers on position in the actuator housing by a spacer pressed the steering shaft to override the actuator wheel into the base of the housing. bushings, preventing further thrust from the steering Figure 2--Flow Diagram--Oil Flow with Control Valve in Straight-Ahead Driving Position n-- 326 Chapter 1 -C--Power Steering--Industrial Tractors Figure 3--Flow Diagram--Oil Flow with Control Valve in Left Turn Position wheel to be transmitted to the actuator cable and thus to the control valve and power cylinder assembly. When the turning movement of the steering wheel is stopped, or when the actuator cable has reached the limit of its travel, the power cylinder continues its travel about 0.008 inch before it comes to rest at a neutral position with respect to the control valve spool. In this position, the hydraulic force applied to the steering linkage is removed. F. Right Turning When the steering wheel is turned to the right, the actuator wheel causes the cable to move the valve spool to the left or toward the rod end of the cylinder. Figure 4. In this position, the spool directs oil, under pressure, to the rod end of the cylinder. This forces the cylinder to move to the left on the piston rod and pulls the right steering arm so that the tractor front wheels turn to the right Figure 4--Flow Diagram--Oil Flow with Control Valve in Right Torn Position Section 2--Power Steering Pump 2. POWER STEERING PUMP 327 A. Removal 1. Remove the cover from the reservoir, Figure 5, and withdraw as much oil as possible, using a suction gun. 2. Loosen the tumbuckle to relieve the belt tension, then remove the drive belt. 3. Disconnect the tumbuckle from the pump by removing the cotter pin and the clevis pin. 4. Disconnect the pressure and return lines from the pump assembly. 5. Remove the bolt which secures the pump sup port to the water outlet connection and remove the pump and the support B. Disassembly 1. Drain the remaining oil from the pump. Clean the outside of the pump and the reservoir. Seal the pressure and return ports to prevent dirt from entering. NOTE: Before disassembly, make sure the bench and the surrounding area are clean. 2. Mount the pump support in a vise with the pump in a vertical position. Disconnect the filter retainer and remove the retainer, spring, spring seat, and filter element from the reservoir. Figure 5. 3. Remove the reservoir retaining stud, lift out the filter element support and the reinforcement plate. Remove the reservoir and the gaskets from the top of the pump. 4. Remove the pulley retaining bolt, lock washer, and flat washer as an assembly, then slide the pulley and the key from the pump shaft. IMPORTANT: Do not hammer. Use a puller if necessary. 5. Loosen the three bolts securing the pump cover to the pump body. Separate the support from the pump by removing the two bolts. Figure 5--Roller Vane Type Oil Pump--Disassembled 328 Chapter 1-C--Power Steering-Industrial Tractors Figure 6--Shaft Seal Installed in Pump Body over the retaining pin and push the cam ring in to seat it firmly. 5. Lubricate the shaft and the shaft seal with Lubriplate or an equivalent, then carefully install the shaft from the cover end of the pump body. Insert the Woodruff key and install the pulley and screw assembly temporarily to prevent the shaft from falling out. 6. Place the carrier drive pin in its groove on the shaft and install the carrier so that with the pulley end of the shaft down, the carrier lobes will be angled in a clockwise direction. Install the snap ring to retain the carrier on the shaft 7. Inspect the rollers, paying particular attention to the finish on the ends and outside. Replace them if scored, damaged, or out-of-round. 8. Check the end clearance of the carriers and the rollers, Use a straight edge and a feeler gauge as shown in Figure 7. If the end clearance exceeds 0.0015 inch, replace the carrier and/or rollers. 9. Inspect the valve assembly and the valve bore for burrs, cracks, or other defects. Use a crocus cloth to remove the burrs. 6. Remove the three bolts from the pump cover and lift the cover vertically from the pump to prevent the internal parts from falling out. 7. Remove the two "O" rings from the pump body. 8. Remove the pump shaft from the cover end of the pump body and remove the thrust washer and the snap ring. 9. Remove the carrier and the six rollers from the pump body. 10. Remove the cam ring and retaining pin. 11. Remove the shaft seal from the pump body. Be careful not to damage the shaft bushing. 12. Disconnect the hex head flow valve fitting and remove the spring and the relief valve assembly from the pump cover. D. Assembly 1. Position the shaft thrust washer in the cover with the concave side toward the shaft end. 2. Position the pump body and the cover together using new "O" rings. Secure them loosely with the three short bolts, then remove the pulley. 3. Position the pump support to the pump and secure them with the two long bolts. 4. Tighten all five bolts evenly to 20-25 ft lbs. torque. After tightening the bolts, rotate the shaft to make sure it does not bind. C, ( waning. Inspection, and Rey 1. Wash all the parts in a solvent and aJ* ciry. 2. Check the pump body and the cover for damage and the shaft bushings for wear. Replace them if necessary. 3. Install a new shaft seal (metal side out) in the pump body, Figure 6. Coat the seal lip with M-1C31 grease. _ ,, 4. Inspect the cam ring for wear. Replace it if it is worn or damaged. Insert the retaining pin in the hole in the pump body. Position the cam ring Figure 7--Checking Clearance of Carrier and Rollers in Pump Body Section 3--Power Cylinder and Valve End Assembly 329 with the reservoir stud tightened to 30-35 ft lbs. torque. 8. Install the filter element and secure with the reservoir retainer, spring, and spring seat De press the retainer and hook it to the bottom of the bore. 9. Insert the key and install the pulley with the flat side toward the pump body. Install the flat washer, lock washer, and pulley retaining bolt. Tighten the bolt to 15-20 ft lbs. torque. Figure 8--installing Pump Flow Control Valve 5. Assemble the spring to the flow control valve and insert the valve in its bore so that the valve extension enters first, Figure 8. Make sure the valve does not stick. Using a new "O" ring, install the valve retainer and tighten it to 30-35 ft lbs. torque. 6. Install new "O" rings in the grooves at the top of the pump body. 7. Position the reservoir, reinforcement plate, and filter element support to the pump body. Secure E. Installation 1. Mount the pump support to the water outlet connection and secure with the bolt. 2. Install new "O" rings on the pressure fitting and connect the pressure and return lines to the pump. 3. Place the drive belt around the pump pulley. 4. Attach the tumbuckle to the pump support with the clevis pin and cotter pin. 5. Adjust the tumbuckle to obtain %" belt deflec tion midway between the pulleys under 15-20 lbs. pressure. 6. Fill the reservoir to within % inch of the top with M2C41 hydraulic oil and install the cover. 7. Operate the engine at idle speed while turning the tractor wheels through their complete range several times. Then, stop the engine and add fluid to within %" of the reservoir level. 8. Check the belt tension for proper deflection. Be cause proper belt tension is very important, it should be rechecked after 30 minutes operation. 3. POWER CYLINDER AND VALVE END ASSEMBLY A. Removal 1. Remove the boot from the operating stud and remove the large cylinder shield, if tractor is- so equips id. 2. Set a drain pan under the power cylinder and disconnect the pressure hose and the return hose at the cylinder and remove the clamp, Figure 9. 3. Remove nut (C), Figure 10, from the cable end and disconnect the tube bracket from the cylin der at (B), by removing the two bolts and washers. 4. Disconnect the piston rod end, Figure 11, from the axle by removing the cotter pin and the castellated nut from the rod end. Then, pull the rod end out of the axle bore from the rear. Remove the flat washer from the rod end. 5. Disconnect the cylinder end of the power cylin der from the right steering arm by removing the cotter pin and castellated nut (D), Figure 10, to free the assembly as shown in Figure 11. NOTE: The right front wheel has been re moved in Figure 10 for purposes of illustra tion only. 6. Unscrew the rod end assembly, Figure 9, from the piston rod using two wrenches. One wrench should engage the flats on the piston rod. 330 Chapter 1-C--Power Steering--Industrial Tractors 4. Pry out the wiper seal and the "T" ring seal from the bore of the rod guide; 5. Remove the valve end operating stud and dust cap, Figure 13. NOTE: Turn the stud 90 to clear the guide opening. 6. Unscrew and remove the cylinder end assembly from the outer tube. Figure 12. 7. Remove the valve end assembly from the piston rod end of the outer tube by tapping the outer tube on a bench (note that the outer tube is flared at the rod end to facilitate removal of the control valve). 8. Remove the guide from the valve spool support, Figure 13. 9. Drive out the roll pin securing the valve spool support to the valve spool. 10. Remove the inner plug, Figure 12, from the "O" ring end of the valve housing. NOTE: The plug which is held in the valve body by two "O" rings, may be removed with the fingers or pliers. 11. Remove the valve spool from the inner plug end of the valve. 12. Remove the retainer and "O" ring from the oppo site end of the valve body. Figure 9--Cable and Shield Assembly Removed from Cylinder IMPORTANT: Do not use a pipe wrench on the cylinder rod for removing the rod end assembly. 7. Slide the shield bracket and back-up washer from the cylinder piston rod and pull the cable end out of the operating stud at the opposite end of the cylinder, Figure 9. B. Disassembly 1. Clamp the assembly horizontally in a vise, grip ping it somewhere near the center. To avoid distorting the outer tube, do not tighten the vise excessively. 2. Loosen the rod guide and seal assembly, Figure 18, with a pin-type spanner wrench. Unscrew the guide and seal from the outer tube and remove the guide, inner tube, piston and rod, Figurel2. 3. Remove any paint, dirt, or burrs, from the end of the rod and carefully slide the guide and seal assembly from the rod. Figure 10--Power Cylinder Assembly with Boot and Shields Removed Section 3--Power Cylinder and Valve End Assembly 331 C. Inspection 1. Remove all "O" rings and seals and discard them. Then, clean all parts in a suitable solvent. 2. Inspect the valve body and the spool carefully for scoring or damage. Coat the spool with a film of light oil and check its fit in the valve body. The spool should slip through the body freely of its own weight NOTE: The valve spool and valve body are select fits and are serviced only as an assembly. 3. Inspect the inner tube, piston, piston ring, and piston rod for wear or scoring. Replace parts as necessary. 4. Examine the operating stud bushing and the end assemblies for wear or damaged threads. Replace defective parts. 5. Install new "O" rings and seals. Figure 11--Power Steering Cylinder Assembly Removed 13. Drive out the roll pin which secures the brass connecting pin to the valve spool. 14. Remove the valve spool plug from the valve spool. D. Assembly Lubricate all parts with Lubriplate or equivalent, before assembling. 1. Install the valve spool plug in the valve spool. (Location is unimportant since the plug will seek its own position during operation of the system.) Figure 72--Power Cylinder and Valve End-- Disassembled 332 Chapter 1 -C--Power Steering--Industrial Tractors "retainer VALVE SPOOL / VALVE SPOOL SUPPORT Figure 13--Control Valve Guide and Operating Stud 2. Use a roll pin to attach the brass connecting pin to the valve spool 3. Install the valve spool in the valve body. a. Position the valve body so that the inner plug end ("O" ring groove on the outside) is on your left b. Position the valve spool so that the yoke end is on your right and the spool is at the left side of the valve body, Figure 14. c. Insert the spool into the valve body so that the left end of the spool extends far enough to clear the "O" ring groove. Then, install the "O" ring. NOTE: The reason for this method of in stallation is to prevent either "O" ring from protruding into the groove in the valve bore and becoming damaged. 4. Withdraw the spool from the right side far enough to install the "O" ring and retainer over the yoke end of the valve spool. 5. Attach the valve support to the valve spool yoke with a roll pin. IMPORTANT: Do not damp the valve body in a vise when installing this pin. Figure 15--Piston Rod Assembly 6. Coat three new "O" rings with white or water proof grease and install them on the inner plug. 7. Install the double "O" ring end of the inner plug into the bore of the valve body. Be sure the plug is properly seated. 8. Install a new "T" ring seal in the groove at the center of the rod guide bore. 9. Press in a new wiper seal in the bore at the outer edge of the rod guide. 10. If required, install new rings on the piston. 11. Make sure the rod surface is smooth, then slide the rod guide onto the rod. Figure 15. Figure 14--Valve End Body, Spool, and Guide Assembly Figure 16--Assembling Inner Tube to Pisfon and Rod Section 3--Power Cylinder and Valve End Assembly 333 Figure 17--Installing Inner Tube Into Outer Tube 12. Clamp the flats at the threaded end of the rod in a vise, Figure 16. Make sure the vise does not grip the threads. 13. Install the inner tube on the piston and rod assembly. 14. Connect the valve body assembly to the inner tube assembly by inserting the inner plug end into the hole in the inner tube. 15. Install the valve body with the inner tube and the piston and rod assembly into the outer tube. Make sure the ports in the valve body are aligned with the holes in the outer tube, Fig ure 17. 16. Install the guide over the valve support at the right side of the valve body. 17. Screw the cylinder end assembly into the oper ating stud end of the outer tube until the peening mark on the threads line up with the Vs" hole in the outer tube. This is necessary to align the ball stud in the end assembly with the control valve operating stud. 18. Install the valve operating stud. The flat surface of the stud, when installed, should be perpendic ular to the cylinder. 19. Install the lower stud retaining ring around the stud and over the grommet, then install the stud upper seal and retaining ring. 20. Thread the rod guide into the outer cylinder and tighten to 200-230 "A. Lbs. Us&s pLjAypt spauier wrench, Figure IS.. E. Installation 1. Insert the piston rod through the hole at the shield end of the shield and bracket assembly. Figure 9, and position the control cable end through the operating stud. Then, install the two bolts and lock washers that attach the bracket to the cylinder. 3121 Figure 18--Installing Piston Rod Guide Assembly 2. Install lock nut (C), Figure 10, on the end of the control cable. NOTE: Control cable adjustment should not be necessary providing that the cable and con duit assembly slider tube has not been dis turbed during cylinder removal. If adjustment is required, refer to Section 5, CONTROL CABLE AND CONDUIT ASSEMBLY-IN STALLATION, step 3 and step 8. 3. Slide the back-up washer, Figure 9, on the piston rod and install the rod and assembly. Torque the nut to 135-140 ft lbs. NOTE: Use wrenches to engage the flats on the piston rod and on the rod end assembly. DO NOT USE A PIPE WRENCH. 4. Position, til cylinder end of th> power cylinder to tiie right steering arm and secure with the castellated nut and the cotter pin (D), Figure 10. 5. Position the piston rod end assembly to the bore in the front axle, Figure 11, and secure with the castellated nut and the cotter pin. 6. Attach the pressure and the return hoses to the cylinder and install the clamp. 7. Install the cylinder shields on tractors so equipped. 334 Chapter 1-C--Power Steering--Industrial Tractors 4. ACTUATOR HOUSING A. Removal of Components Removal of the actuator housing assembly com ponents and the steering shaft and wheel does not require removal of the actuator housing. Should it be necessary to remove this housing for other reasons, follow the procedure described on page 292 under Steering Gear Removal. 1. Remove the battery and loosen the battery carrier. 2. Remove the actuator cable from the actuator housing as follows: a. Remove the nut which attaches the cable con duit to the actuator housing. /POWER STEERING EMBLEM /STEERING WHEEL NUT WASHER DUST SEAL SPRING SEAT -SPRING -STEERING COLUMN BEARING -ACTUATOR SHAFT UPPER THRUST WASHER SHAFT SPACER ACTUATOR HOUSING ASSEMBLY SPENT CABLE CONDUIT CABLE AND CONDUIT ASSEMBLY BOLT' LOWER THRUST WASHER FRICTION WASHER FRICTION WASHE S' " ACTUATOR WHEEL BUSHING' ACTUATOR WHEEL' ACTUATOR WHEEL BUSHING' COMPRESSION SPRING' SELF LOCKING NUT' SPRING SEAT CAP T-1944 Figure T 9--Actuator Assembly--Disassembled b. Rotate the steering wheel counterclockwise until the actuator cable comes completely out of the housing. 3. Pry the dust cap from the bottom of the actuator housing. 4. Hold a wrench on the self-locking nut at the lower end of the steering shaft and remove the nut by turning the steering wheel counterclock wise. 5. Remove the following components, Figure 19, from the lower end of the steering shaft: a. Spring Seat b. Compression Spring c. Friction Washer d. Actuator Wheel Bushing e. Actuator Wheel f. Actuator Wheel Bushing g. Friction Washer h. Lower Thrust Washer 6. Pry the steering hub cover from the steering wheel and remove the steering wheel nut, em blem, and steering wheel. If a puller is necessary, use the type shown in Figure 20, to prevent dis tortion of the steering wheel spokes (Puller 1002, Gear Puller 951). 7. Remove the spring felt packing and spring seat from the top of the steering column. 8. Lift the steering shaft from the actuator housing. If necessary, tap the bottom of the shaft gently with a soft-faced hammer. The steering column bearing will be removed from the top of the column when the shaft is withdrawn. 9. Drive the steering shaft spacer out of the bottom of the actuator housing. Remove the spacer and the upper thrust washer. B. Inspection 1. Clean all parts thoroughly in a suitable solvent 2. Inspect the steering shaft for damage to the splines or to the threads. 3. Check the friction surfaces of the friction wash ers, actuator wheel bushings and actuator wheel for damage. Replace if necessary. 4. Examine the splines on the friction washers, actuator wheel bushings, and actuator wheel. Re place defective parts. 5. Check the spring spring seat, and bearing to make sine they are in good condition. 6. Inspect the bearing surface of the shaft spacer and the thrust bearing for scoring, nicks, or burrs. Replace damaged parts. Section 4--Actuator Housing 335 Figure 20--Removing Steering Wheel C. Installation 1. Install the steering shaft spacer in the actuator housing as follows: NOTE: The spacer is a press fit in the hous ing. In order to install the spacer when the actuator housing is on the tractor, it will be necessary to fabricate an installation tool. A 930-B Puller Leg and a 930-7 Cap and suitable flat washer, spacers, and a hex nut will per form this operation. If these tools are not available, use a suitable rod threaded at each end. a. Insert the rod through the top of the steering column housing. b. Install the shaft spacers, chamfer end up, and a flat washer and nut on the lower end of the rod as shown in Figure 21. c. Install a suitable spacer, flat washer, and nut at the top of the rod as shown in Figure 22, and draw the shaft spacer into its bore by tightening the nut on top of the rod. Remove the tool and make sure that the bottom face of the spacer is flush with its bore. 2. Coat the bearing surfaces and lower spline of the steering shaft with M-1C-18 low temperature grease. 3. Position the upper thrust washer against the shoulder at the lower end of the steering shaft and install the shaft in the housing from the top. NOTE: The upper thrust washer is the thicker Figure 21--Installing Shaft Spacer on Installation Tool of the two thrust washers used on the shaft. 4. Install the steering column bearing on the steer ing column at the top. 5. Position the spring seat, spring, and felt dust seal on the steering column at the top. 6. Install the steering wheel, emblem, and nut and tighten securely. Then, install the steering wheel hub cover. Figure 22--Drawing Shaft Spacer Into Housing 336 Chapter 1 -C--Power Steering--Industrial Tractors NOTE: See Step 10, following, for torque specifications. 7. Install the actuator components, Figure 19, on the lower end of the shaft in the following order: a. Lower Thrust Washer b. Friction Washer c. Actuator Wheel Bushing (Splined end down) d. Actuator Wheel e. Actuator Wheel Bushing (Splined end up) f. Friction Washer g. Compression Spring h. Spring Seat i. Self-Locking Nut 8. Pack the lower end of the actuator housing with M-1C-18 low temperature grease. NOTE: The actuator components are de signed to operate in grease. The presence of grease will not adversely affect the operation of the friction surfaces. 9. Install the actuator cable by inserting the end of the cable in the housing and turning the steering wheel clockwise to engage the cable in the actua tor housing. 10. Adjust torque at upper and lower ends of steer ing shaft: a. Torque nut at lower end of shaft until 50 lbs. pull is measured on the cable as steering wheel is rotated. Revolve the wheel six times to reduce grease film on face of washers. Then increase torque until 75 lbs. pull is measured on the cable as the wheel is rotated. Use the short length of cable, not the conduit Hold the cable stationary and in line with the hole in the casting. b. After completing adjustment described above, and with the cable removed, tighten the nut at the top of steering shaft to 7 inch lbs., maximum. 11. Install the dust cap in the bottom of the actuator housing. 12. Tighten the bolts that secure the battery carrier and install the batteiy. 5. CONTROL CABLE AND CONDUIT ASSEMBLY CONTROL CABLE-WITHOUT REDUCTION GEAR A. Removal 1. Disconnect the control cable conduit from the left side of the actuator housing and remove it by turning the steering wheel counterclockwise. 2. Remove the spent cable conduit from the right side of the actuator housing 3. Disconnect the control cable from the control valve operating stud. Figure 23. 4. Back off the jam nut that secures the cable and conduit assembly to the cable and shield on the power cylinder, Figure 23, and remove it from the shield. 5. Disconnect the cable from the clips that secure it to the tractor. B. Disassembly 1. Remove the slider tube from the conduit. 2. Remove the cable from the conduit 3. Inspect all parts for damage and replace as necessary. Figure 23--Adjustment of Control Cable Section 5--Control Cable and Conduit Assembly 337 C. Assembly 1. Coat the cable with M-1C-18 low temperature grease and insert the cable into the conduit Make sure that the rod end of the cable is at the end of the conduit which attaches to the control valve operating stud. 2. Install the slider tube over the rod end of the cable and thread the tube into the conduit until the shoulder of the tube seats against the conduit. 3. Stake the conduit to the threads of the slider tube. D. Installation 1. Position the jam nut which secures the conduit to the cable shield in the cable shield bracket, and insert the cable, slider tube, and conduit as sembly in the shield. 2. Secure the conduit to the shield bracket by tightening the jam nut. 3. Attach the end of the cable to the control valve operating stud. Adjust the two nuts on the end of the cable so that Va" of cable protrudes from the nut on the outside of the operating stud, Figure 23. 4. Insert the cable into the actuator housing until it engages the actuator wheeL Turn the steering wheel clockwise until movement of the cable stops and the steering shaft slips on the friction washers. 5. Secure the conduit to the actuator housing. 6. Install the spent cable conduit on the right side of the actuator housing. 7. Attach the conduit to the clips on the tractor. 8. Start the tractor and operate the steering wheel through its full range of travel. Check to see that the front wheels of the tractor turn an equal dis tance in both directions and that the steering arm on the right side of the tractor does not contact its stops. If any of these conditions do not exist, adjust the position of the cable in the control valve operating stud until proper turning condi tions are obtained. CONTROL CABLE--WITH REDUCTION GEAR A. Removal 1. Remove the boot from the operating stud. 2. Remove the nut that secures the cable rod to the operating stud. 3. Completely loosen the lower conduit-to-cylinder bracket nut. 4. Disconnect the control cable conduit from the left side of the actuator housing and remove the cable by turning the steering wheel counter clockwise. 5. Disconnect the upper cable conduit from the transmission case bracket. 6. Disconnect the lower cable conduit from the tractor side rail bracket. 7. Disconnect the wheel housing from its support bracket and remove the wheel housing, conduit, and cable as an assembly. B. Disassembly 1. Remove both the upper and lower conduit extensions. 2. Pull the cables from the conduit and the wheel housing. 3. Remove the four bolts that secure the cover to the wheel housing and remove the cover and the wheel. 4. Inspect all parts for damage and replace as necessary. C. Assembly 1. Place the wheel in the wheel housing, position the cover to the housing, and secure with the four bolts. 2. Coat the cables with M-1C-18 low temperature grease and insert them into the conduit and through the wheel housing. Make sure that the rod end of the cable, which attaches to the con trol valve operating stud, is installed in the lower conduit. 3. Install the slider tube over the rod end of the cable and thread the tube into the conduit until the shoulder of the tube seats against the conduit. 4. Stake the conduit to the threads of the slider tube. 5. Install the lower conduit extension. D. Installation 1. Place the wheel housing and the cable and con duit assembly in their installed position, Figure 24, and attach the wheel housing to its support brackivt. Make sure the upper conduit assembly sa.d the lower conduit assembly extension is passed through the holes in the left side member bracket. 2. Position the 14 nut and lock washer in the outer shield and bracket assembly into the outer and inner shield and bracket assemblies until the actuating cable rod passes through the power steering cylinder control valve operating stud. Figure 23. Secure the actuator cable and conduit assembly to the outer shield and bracket assem bly with the 14 nut and lock washers. i 338 Chapter 1-C--Power Steering--industrial Tractors Figure 24--Control Cable Reduction Gear Assembly Installed 3. Thread the remaining Va"--28 nut onto the actu ating cable rod and tighten both nuts against the faces of the actuator stud, then install the boot 4. Be sure the parking brakes are set and locked; be sure the tractor is out of gear, then start the engine. Grasp the upper end of the upper actu ating cable and slowly pull the cable as far out as possible. This will turn the tractor wheels to a full right turn position. Keep pull pressure on the cable and with a rule, measure the distance the cable extends from the face of the wheel housing, as shown in Figure 25. The cable should extend between V&" and 3/b". If not within these limits, thread the cable either in or out as re quired, by turning it right or left Stop the engine and install the upper conduit extension. Figure 25--Adjusting the Upper Cable Extension 5. Insert the upper end of the upper cable into the actuator housing and thread it in by turning the steering wheel to the right until the threads of the upper cable conduit meet the threads in the actuator housing. Start the conduit threads by hand, then tighten with a %e" end wrench. 6. Attach the upper cable conduit to the transmis sion case bracket. 7. Attach the lower cable conduit to the tractor side rail bracket. 8. Start the engine and operate the steering wheel through its full range of travel. Check to see that the front wheels of the tractor turn an equal distance in both directions and that the steering arm does not contact the stops on the right side of the axle. If the wheels do not turn an equal distance, or if the steering arm contacts a stop at the full range travel in either direction, ad just the position of the cable in die control valve operating stud to obtain proper movement of the front wheels. ^ 7,. jble Slow Steering Action or No Steering Action 6, TROUBLE SHOOTING | ?'>ssible Cause Improper oil level in reservoir Corrective Action Check reservoir for proper level. Pump output low Air in system Tubing or hose damaged Pump drive belt loose or slipping Check for dirt in the system or for burrs on. the flow spool or the valve liner. Check all tube connections and fittings for leaks. Tighten connections. Replace the fittings if necessary. Bleed air from the system. Replace tubing or hose that is visibly damaged. _ Adjust the belt to obtain lA" deflection, halfway between the pulleys, under 15 to 20 lbs. pressure. _ Section 6--Trouble Shooting 339 TROUBLE SHOOTING CONT'D. Trouble Slow Steering Action or No Steering Action Possible Cause Pump flow valve spool stuck in open position Weakened or broken pump relief valve spring Bolts loose in pump Pump relief valve leaking Weakened or broken pump flow control valve spring Pump flow control valve assembly defective Hard or Jerky Steering Toward End of Full Left or Full Right Tum Pump Noisy Leaking power cylinder Pump drive belt loose Improper oil level in reservoir Air in system ' Pump pulley loose Loose Steering Steering Wheel pulls to One Side Front i.hesis Will Not Remain in Straight Ahead Position or Other Position Selected by Operator Front Wheels Surge When Turning Pump defective Water in oil Improper preload on actuator shaft friction spring. (Industrial Tractors) Fluid level low Excessive clearance between ball stud and ball stud seats Improper cable adjustment (Industrial Tractors) Improper cable adjustment (industrial Tractors) t{ Control Valve spool sticking Improper cable adjustment (Industrial Tractors) Control Valve spool sticking Excessive internal leakage in cylinder assembly Corrective Action Check for dirt in the system or for burrs on the flow valve spool or the valve liner. Replace the relief valve assembly. Tighten the bolts to specified torque. Check for dirt or nicks on the relief valve seat Re place the relief valve assembly. Clean the flow valve spool spring screen. Check the spring tension. Replace it if weak. Disassemble the flow control valve assembly. Check for scratches or scoring on the control valve spool lands and in the control valve bore. Replace the entire assembly if defects are found. Replace the piston rod seal or the power cylinder assembly. Adjust the belt to obtain V4" deflection, halfway between the pulleys, under 15 to 20 lbs. pressure. Check for proper reservoir level. Check all tube connections for leaks. Tighten the connections. If necessary, replace fittings. Make sure the key is properly inserted in the key way. Tighten the pulley retaining bolt to specified torque. Replace the pump. Drain the oil from the system and replace. Replace the spring. Fill the reservoir to proper level. Remove and disassemble the control valve sleeve and flange assembly. Check the tension of the ball stud spring. Replace the spring if defective. Reset the cable adjustment Reset the cable adjustment Check for dirt i:i the system or for burrs on the flow valve or the valve liner. Reset the cable adjustment. Check for dirt in the system or for burrs on the flow spool or the valve liner. Replace the piston rod seal. 340 Chapter 1-C--Power Steering--Industrial Tractors TROUBLE SHOOTING CONT'D. Trouble Binding Condition Possible Cause Interference at the sleeve, dust shield, and ball stud connection (Row Crop Tractors) Steering Chatter Piston rod end play (General Purpose Tractors) Side rail rod support loose (Row Crop Tractors) Pump belt loose or slipping Corrective Action Check the ball stud for a groove caused by rubbing against the side of the slot in the sleeve and flange assembly. Replace the ball stud if damaged. Also, check the dust shield for possible cramping on the sleeve assembly. Replace the shield if it appears to hamper the free movement of the ball stud. Check the rubber insulators for excessive wear or damage. Replace them if defective. Check the cylin der rod nut for proper tightness (20-25 ft. lbs.) Tighten the bolts that secure the piston rod support to the side rail of the tractor. Adjust the belt to obtain Vi" deflection, halfway be tween the pulleys, under 15 to 20 lbs. pressure. 7. SPECIFICATIONS Pump Capacity.... 7.5 gpm @ 1250 engine rpm and 1200 psi Type............................................................................Roller Vane Drive......................................Belt, 2:1 ratio with engine rpm Max. Operating Pressure...........................................1550 psi Cylinder Type.................................Integral with valve, 11.6" stroke Steering Gear Steering Housing Actuator Adjustment.... .25 to 30 lbs. pull at Steering Wheel Torque Limits Ft. lbs. Pump Flow Control Valve Fitting...............................30-35 Pump Cover to Pump Body Bolts...............................20-25 Pump Reservoir Retainer Stud....................................30-35 Pump Pulley Retaining Bolt............................................15-20 Power Cylinder Piston Rod Guide Assembly.. .200-230 8. SPECIAL TOOLS The following tools will be helpful in removing or repairing the various components of the power steering system. Tool Number Description 930-B.............................................................................Puller Leg 930-7 .........................................................................................Cap 1002 .......................................................................................Puller 951............................................................................... Gear Puller Part THREE STEERING, FRONT AXLE, BRAKES, WHEELS, AND TIRES Chapter Front Axle Section Page 1 General Purpose Front Axle--Standard and Heavy Duty.......................................................................................... 341 2 Row Crop Front Axles ........................................................................................................................................................... 346 3 Row Crop Pedestal..................................................................................................................................................................... 348 4 Row Crop Wide Adjustable Front Axle.............................................................................................................................. 353 5 Industrial Front Axle................................................................................................................................................................ 355 6 Specifications ............................................................................................................................................................................... 360 7 Trouble Shooting ....................................................................................................................................................................... 361 8 Special Tools .............................................................................................................................................................................. 361 The front axle on "General Purpose" tractors consists of a center axle assembly, right axle half, left axle half, radius rods, steering spindle arms, front support, and right and left spindle assemblies. The axle halves are designed as housings or supports for the spindle assemblies. On "Row Crop" tractors, a pedestal assembly accommodates the front wheel mounting and serves as a support for the front end. This closed pedestal houses the steering sector gear and shaft assembly. The pedestal is bolted to the engine side rails. An adapter is available for "Row Crop" tractors to convert them into a wide adjustable four wheel model. The "Industrial" front axle is a non-adjustable type and is secured in the yoke of the front support member by a solid axle pin. 1. GENERAL PURPOSE FRONT AXLE- STANDARD AND HEAVY DUTY RADIUS ROD A. Removal Refer to Figure 1 for an exploded view of the "General Purpose" front axle. 1. Remove two nuts and lock washers and remove the radius rod ball cap at the transmission, Figure 2. 2. Remove the nut and lock washer from the radiusrod-to-axle bolt and drive the bolt out of the center axle with a soft mallet. If the bolt is seized, drive it out with a heavy hammer and punch. IMPORTANT: Never use heal to remove axle bolts. 3. Remove the radius rod from the tractor. NOTE: On tractors equipped with power steering assist, refer to Page 298, to remove the power cylinder. B. Installation 1. Inspect the radius rod for a fractured or sprung condition. A bent radius rod is an indication that the axle is sprung. Check the ball joint for wear or scoring. 2. Position the radius rod over the center axle and insert the rod-to-axle bolt, using a new bolt if the original bolt was loose or threads were damaged. Tighten to 75-135 ft. lbs. 3. Coat the ball joint lightly with grease and secure in place with the ball cap, lock washers, and nuts. 4. Tighten the nuts to 45-50 ft lbs. A. Removal AXLE HALF 1. Use a suitable jack or hoist to support t' e front end of tractor. 2. Remove the wheel and hub descri-ed on Page 369. 3. Remove the spindle arm nut, lock washer, and bolt. Remove the spindle arm from the spindle assembly, Figure 3, with Puller 1001 and Step Plate 630-2. NOTE: If the spindle assembly seals or bear ings are to be replaced and the axle half is not 341 342 Chapter II--Front Axle damaged, omit step 4 and proceed to "B" Disassembly. 4. Remove two nuts and lock washers and separate the axle half from the center axle. B. Disassembly 1. Remove the Woodruff key and seal, and pull the spindle assembly from the axle half, Figure 4. 2. Secure the axle half in a vise. 3. Remove the upper and lower bushing with an arbor press or suitable puller. When removing bushings, use extreme care so as not to enlarge the bore. NOTE: On heavy duty front axles, the lower bushing should be removed by using a "Cape" chisel to collapse the bushing. 4. Remove the bearing assembly. C. Cleaning and Inspection 1. Clean all metal parts in solvent 2. Inspect the axle half for fracture or sprung condition. Figure 1--General Purpose Front Axle Section 1--Genera! Purpose Front Axle--Standard and Heavy Dufy 343 Figure 2--Removing Radius Rod 3. Inspect the spindle for galling, burrs, or sprung condition. 4. Inspect the dust seal and bearing for signs of wear. D. Assembly 1. Install the axle half upper and lower bushing, Figure 5, with Bushing Driver T-807 and an arbor press. Be sure the bushings are pressed all the way in the housing. NOTE: On heavy duty front axles, the lower bushing should be installed with Bushing Driver T-808 and a No. 815 Driver Handle. Drive the bushing in until the edge of the bushing is flush with the lower end of the chamfer in the housing, as viewed from the thrust bearing end of the housing. 2. Place the bearing in the bore. 3. Insert the spindle assembly in the axle half housing. 4. Install the Woodruff key and upper seal. E. Installation 1. Position the axle half on the center axle and in stall the bolts, lock washers, and nuts; tighten to 135-150 ft lbs. 2. Install the spindle arm fcd&, loch washes, ard ?.. t; tighten to 60-70 ft lbs. 3. Install the wheel and hub as described on Page 369. FRONT AXLE SUPPORT A. Removal 1. Use a suitable jack or hoist to support the front end of the tractor. 2. Remove two hex head cap screws and two thumb screws, and remove the lower front hood panel. 3. Remove the radiator as described on Page 152. 4. Remove the cotter pins and castellated nuts, and separate the drag links from the spindle arms. 5. Disconnect the radius rods at the center axle or at the transmission. 6. Remove the four nuts and lock washers securing the front support to the engine and roll the axle and support away from the tractor, as shown in Figure 6. NOTE: Effective with Tractor Serial No. 41889, the front axle pin used on "General Purpose" tractors was replaced with a threaded axle pin. Threaded Axle Pins: a. Remove the bolt and lock washer securing the locking flange to the front support and remove the snap ring and locking flange, Figure 7. b. Remove the threaded pin by turning it counter clockwise. A piece of bar stock 3A" x 2" can be Figure 3--Removing Spindle Arm 344 Chapter H--Front Axle Figure 4--Axle Half--Disassembled View used as a special tooL Insert the end of the bar between the ears of the pin and use a wrench to turn the tooL NOTE: The heavy duty front axle has a hex head. Figure 6--Removing Axle Assembly Non-Threaded Axle Pins: a. Remove the axle pin retaining screw and lock washer. b. Use a slide hammer with a suitable adapter and pull the pin as shown in Figure 8. 7. Remove the front axle support. B. Cleaning and Inspection 1. Clean all metal parts in cleaning solvent 2. Inspect the support for cracks, distortion, or other signs of fatigue. Figure 5--Installing Axle Half Bushing Figure 7--Threaded Axle Pin Section 1--Genera! Purpose Front Axle--Standard and Heavy Duty 345 4. Remove the radiator as described on Page 152. 5. Remove the front axle pin. Refer to front axle support removal, step 6, on Page 343. 6. Remove the four axle-half-to-center axle nuts, lock washers, and bolts. 7. Using the spindle arms as pivot points, position the axle halves aside to provide clearance for withdrawing the center axle. 8. Withdraw the center axle, Figure 9, from either side of the tractor. NOTE: On heavy duly front axles, a spacer bushing is incorporated in lieu of a press fit bushing. Slide the center axle forward and remove the axle and bushing sideways from the support assembly. Figure 8--Removing Non-threaded Axle Pin 3. Inspect the axle pin for burrs and galling. C. Installation 1. Position the support on the axle assembly and, depending upon type of center pin, drive or screw the pin into the center axle and support assembly. 2. Secure the center pin as appropriate with screw and lock washer or with locking flange; bolt, and lock washer. 3. Position the axle and support assembly on the tractor. Install and tighten the four support-toengine nuts and lock washers to 135-150 ft. lbs. 4. Attach both radius rods at the transmission. 5. Attach the right and left drag links to the spindle arms. 6. Install the radiator as described on Page 152. 7. Install the grille with four attaching screws. CENTER AXLE A. Removal On tractors with front mounted loading equipment, it is necessary to remove the entire front axle assem bly from the tractor befors the center axle can Ve removed. For cr/rapJete. fitcS. axle re~oval, refer fa Front Axle fh.pport Stejcaovai, Page 343. The following procedure pertains to tractors without such special front mounted equipment 1. Use a suitable jack or hoist to support the front end of the tractor. 2. Remove the nut and lock washer from each radius-rod-to-axle bolt and drive each bolt out of the center axle with a soft mallet 3. Remove two hex head cap screws and two thumb screws and remove the lower front hood panel B. Repair 1. Check the bushing for scoring. 2. Check the axle for cracks and alignment 3. If the bushing is damaged, remove it with an arbor press or suitable puller; and install a new bushing. C. Installation Standard Axle: 1. Position the center axle in the axle support 2. Position the axle halves and install the bolts, lock washers and nuts finger tight 3. Install the front axle pin. 4. Install the radiator and grille. 5. Attach the radius rods to the axle and tighten the nuts to 75-135 ft lbs. 6. Tighten the axle bolts to 135-150 ft lbs. Figure 9--Removing Center Axle -I' tr 346 Chapter II--Front Axle Heavy Duty Axle: 1. Place the spacer bushing approximately mid way in the center hole of the center axle. 2. Working from either side of the tractor, slide the center axle section into position. 3. Thread the axle pin into the rear support and tighten it to 200 ft lbs. 4. Position the locking flange over the hex head of the pin and align the flange bolt hole with the hole in the support 5. Place a washer between the locking flange and the front support and install bolt and lock washer. 6. Attach the axle halves, radiator, grille, and radius rod. 2. ROW CROP FRONT AXLES Three interchangeable front axles are available for the new pedestal on "Row Crop" tractors. These are the single wheel front axle, dual wheel front axle, and wide adjustable front axle. The single and dual wheel axles are an integral part of their respective spindle assem blies, which are mounted to the pinion shaft located at the bottom of the pedestal. Figure 10. The wide adjust able front axle is attached to an axle support, which bolts to blind tapped holes in the bottom of the pedestal body, Figure 10. The following procedures contain in formation on removing and installing the three front aides. The single and dual wheel front axles cannot be disassembled or repaired. For disassembly and repair of the wide adjustable front axle, refer to the appropriate section. SINGLE OR DUAL WHEEL FRONT AXLES A. Removal The single and dual wheel front axles are removed in the same manner except that the wheel and tire of the single front wheel axle must be removed to pro vide access to the mounting bolts. 1. Use a suitable jack or hoist to support the front end of the tractor and set the rear wheel parking brake. 2. Position the steering wheel in the straight ahead position. 3. Remove four bolts securing the spindle assembly to the pinion shaft pad. Figure 10--Wide Adjustable Front Axle Attaching Points Figure II--Installing Single Wheel Front Axle ft Section 2--flow Crop Front Axles 347 Figure 13--Installing Wide Adjustable Front Axle Figure 12--installing Dual Wheel Front Axle B. Installation 1. With the front end of tractor jacked up to sufficent height, align the spindle assembly with the holes of the pinion shaft pad. Figure 11 shows the correct position of the single wheel front axle and Figure 12 shows the correct position of the dual wheel front axle. IMPORTANT: If either front axle is assem bled in reverse, the axle caster will be affected. 2. Install the mounting bolts and tighten them to 135-150 ft. lbs. WIDE ADJUSTABLE FRONT AXLE A. Removal 1. Using a suitable jack or hoist, raise the tractor front end high enough to take the weight off the front-wheels and place a jack stand under the radius rod at the support connection as shown in Figure 13. 2. Remove two short bolts securing the steering arm to the pinion shaft pad. 3. Remove four bolts securing the axle support to the bottom of the pedestal. 4. Raise the tractor high enough to clear the axle support and roll the axle assembly away from the tractor. B. Installation 1. Raise the front end of the tractor high enough to clear the axle support and roll the axle assembly into position. Stabilize the axle assembly with a jack stand as shown in Figure 13. 2. Align the four axle support bolt holes with the holes in the bottom of the pedestal and lower the tractor until contact is made. In all the axle support to pedestal fcaivs and tighten them to 150-180 ft- lbs. 4. Move the front wheels to align the steering arm bolt holes with the two rear holes in pinion shaft pad. 5. Install the short bolts and tighten them to 150180 ft. Ibs. Install two plugs in the front holes in the pinion shaft pad and tighten them to 130-150 ft lbs. 348 Chapter il--Front Axle 3. ROW CROP PEDESTAL On "Row Crop" tractors, a pedestal assembly is bolted to the engine side rails and serves as the front support of the tractor. On models prior to Serial No. 110986, the pedestal had a long spindle housing to which a long shank dual wheel spindle was assembled. Beginning with Tractor Serial No. 110986, the spindle housing was re duced in height and a pinion shaft was assembled to the pedestal in the same manner as the spindle. The pinion flange accommodates all three front axle options. Figure 14 is a cutaway of the early pedestal assembly. Figure' 15 is an exploded view of the new pedestal assembly. Assembly and disassembly procedures are given for both models. LATE MODEL PEDESTAL A. Removal 1. Remove the radiator as outlined on Page 152. 2. Remove the front axle as described under Row Crop Front Axles, Page 346. 3. Remove the nut and lock washer securing the steering arm to the sector shaft and remove the steering arm using Puller 1002. NOTE: On tractors equipped with power steer ing,, support the power cylinder and control valve by securing il to the headlamp. 4. Remove the eight bolts from the pedestal cover and remove the cover and gasket. Discard the gasket. 5. Place a container under the pedestal and remove the recessed drain plug located on the machined front face of the pedestal and allow the oil to drain. 6. Remove six nuts, washers, and bolts securing the pedestal assembly to the engine side rails, and pull the pedestal away from the tractor. Be sure the pedestal is firmly supported when it is removed. B,, Risas-ieE-Sb?*/ 1. Remo re die four bolts and lock washers from the sector shaft cap and remove the cap, shim pack, and shaft seal, Figure 15. NOTE: Effective with Tractor Serial No. 18122, a flanged seed is used. This seal bolts to a new cap rather than the press fit of old cap and setd. 2. Remove the pinion shaft cotter pin and retaining nut. Drive the pinion shaft down through the pedestal using a soft mallet Figure 14--Pedestal Assembly--Early Model 3. Remove the tapered roller bearing from the pinion shaft with Puller 951. 4. Rotate the sector shaft until the pinion gear becomes disengaged. Lift the pinion gear out through one of the holes in the top of the pedestal housing. 5. Remove the sector shaft (gear end first) in the same manner as the pinion gear. 6. Drive two sector shaft bushings from the sector shaft bore using Tool NCB-3179, as shown in Figure 16. 7. Remove the small pinion shaft bearing from the bearing cup at the top of the pinion shaft bore. This bearing is a slip fit and can be removed by hand. 8. Using the special tools shown in Figures 17 and 18, remove the small bearing cup frcn the top of the pinion shaft bore and the large taring cr from the bottom of the pinion shaft bore, 9. Drive the pinion shaft seal out of the bore using a wood block and hammer. C. Pedestal Repair 1. Clean all parts in cleaning solvent 2. Inspect the pedestal housing for cracks, distortion, or other serious defects. 3. Inspect the bearings, bearing cups, and seals for cracks or serious galling. SIDE RAILS Section 3--Row Crop Pedestal BEARING PINION GEAR--| SECTOR SHAFT 349 -PEDESTAL COVER GASKET SHAFT SEAL LOWER BEARING BEARING CUP *^Z) SECTOR SHAFT BUSHINGS -SHIM PACK SECTOR SHAFT CAP -OIL SEAL Figure 15--Pedestal Assembly--Lafe Model PINION SHAFT 031 4. Inspect the gears for cracks or missing teeth. 5. Inspect all bolt holes for elongation or cracks. 6. Inspect the bushings for scoring or wear. D. Pedestal Reassembly 1. Place the pinion upper and lower bearing cups in the pinion shaft bore. Tap each cup gently around the edge until firmly seated. Use a brass rod or a wood block and hammer to seat the bearing cups. 2. Insert a new oil seal through the lower bearing cup in the pinion shaft bore. Use a hammer and wood block to position the seal. There must be 1.48" clearance between the bottom of the seal and the machined face of the shaft bore. Seal positioning is best accomplished by laying a straight edge across the face of the bore, as shown in Figure 19, and using a ruler to measure Figure 16--Removing or Installing Pedestal Sector Shaft Bushings Figure 17--Pulling Pinion Shaft Upper Bearing Cup 350 Chapter II--Front Axle Figure 18--Pulling Pinion Shaft Lower Bearing Cup the distance from the bottom of the seal to the machined face at the straight edge. IMPORTANT: There is no seat in the bore to retain the oil seal. Exact positioning of the setd must be achieved to prevent oil leakage at the pinion shaft. 3. Install the sector shaft bushings (inner bushing first) in the bore, using Tool NCB-3179. 4. Insert the sector shaft, threaded end first, into the top of the pedestal housing and through the sector shaft bore. 5. Place the pinion gear over the pinion shaft bore inside the pedestal housing. Rotate the sector shaft at the threaded end, to engage the pinion gear. Make certain that both gears are meshed at the center of travel. When properly engaged, the pinion gear leg should contact either stop in the pedestal housing when rotating the sector shaft IMPORTANT: Correct gear meshing is re quired to assure equal turning radius of the pinion shaft. 6. Pack the large tapered bearing with M-4664 grease and install it on the pinion shaft with Puller 951. Insert the pinion shaft in bore from the bottom of the pedestal housing and push it through the seal and pinion gear, making sure that the master splines on the pinion shaft and pinion gear are properly aligned for spline en gagement Figure 20--Installing Spindle Upper Oil Seal Section 3--Row Crop Pedestal 351 7. Pack the upper tapered bearing with M-4664 grease and place it on the pinion shaft and slide it into the bearing cup. 8. Secure the pinion shaft in the pedestal with the castellated nut. Tighten the nut sufficiently to eliminate end play in the shafts but make sure the shaft turns freely. Install the cotter pin in the nut. Tractor Serial No. 18122 And Up: a. Place the shim pack on the sector shaft. b. Position the cap on the sector shaft c. Apply M-4684-G grease in the cavity of the seal lips. d. Install the seal so the seal flange contacts the cap. e. Align the seal, shim, and cap bolt holes and secure with the four bolts and lock washers. Tighten to 35-40 ft. lbs. Tractors Prior To Serial No. 18122: a. Place the shim pack on the sector shaft b. Press a new oil seal into the cap and align the bolt holes in the shim pack and cap. c. Install the four bolts and lock washers and tighten to 35-40 ft. lbs^ securing the cap and shim pack. NOTE: Backlash between the sector gear and the pinion shaft should be from 0.00050.0035 inch when the tractor wheels are in a straight ahead driving position. Remove or add shims as necessary to obtain the proper adjustment. 6. Install the front axle as outlined in Row Crop Front Axles Page 347. 7. Install the radiator as instructed on Page 152. EARLY MODEL PEDESTAL Due to the manner in which this pedestal is con structed, it is recommended that the unit be disassem bled before removing it from the tractor. (The pedestal and wheels can be removed as an assembly for engine repair.) A. Pedestal Disassembly Figure 21 is an exploded view of this pedestal assembly. 1. Remove the tractor grille. 2. Remove the eight screws and lift the cover off the pedestal oil reservoir. 3. Place a container under the pedestal. Remove the drain plug on the pedestal front face and allow the oil to drain. 4. Support the front end of the tractor with a hoist or jack. 5. Remove the front wheels from the tractor. E. Pedestal Installation 1. Attach the pedestal to the tractor side rails with six nuts, bolts, and lock washers, and tighten to 150-180 ft lbs. 2. Install the steering arm (in a vertical position for straight ahead driving) on the sector shaft and rsr-'re with a nut and lock washer. Tighten the nm \o 160-180 ft. lbs. On tractors equipped with power iteering, attach the power cylinder. 3. Install the drain plug in the pedestal housing. 4. Fill the pedestal oil reservoir with two quarts of oil, specification EP Lub. SAE 80 winter and summer. 5. Place a new gasket over the pedestal reservoir and install the cover with eight bolts and tighten them to 25-30 ft lbs. Make sure that the oil level dipstick gasket is in place and that the bolt is tight Figure 21 --Early Pedestal--Exploded View 352 Chapter II--Front Axle 6. Remove the nut and lock washer and pull the spindle arm off the sector shaft. 7. Remove the four cap screws and lock washers and remove the cap assembly and shim pack. 8. Remove the cotter pin, nut, and washer from the spindle. Carefully drive the spindle down out of the pedestal housing with a soft mallet. If it is necessary to drive hard, install a nut loosely on the spindle and drive against the nut. IMPORTANT: Do not allow the spindle to drop on the floor as it comes out of the housing. 9. Remove the tapered bearing from the spindle using Puller 951. 10. Rotate the pinon gear until it is disengaged and lift it out of the pedestal. 11. Lift the sector shaft, gear end first, out of the pedestal. 12. The sector shaft bushings can be removed and installed with the pedestal either on or off the tractor. Use Tool NCB-3179 to drive the bush ings out or to install the bushings, Figure 16. B. Pedestal Removal This procedure is based on prior disassembly of the pedestal. 1. Remove the radiator, as outlined on Page 152. 2. Remove the four pedestal-to-side rail, and two pedestal-to-engine front support nuts and bolts. With the pedestal firmly supported, pull it away from the tractor. NOTE: It may be necessary to loosen the generator adjusting bracket to obtain access to the lower pedestal-to-side rail retaining nuts. C. Pedestal Repair 1. Clean all metal parts with solvent. 2. Check the pedestal mounting faces for nicks and burrs. . Check the bolt holes for cracks and elongation. Inspect the pedestal for cracks. 5. Inspect the spindle, pinion gear, and sector gear and shaft for wear, distortion, or chipped teeth. 6. Check the bushings for wear. If the bushings are worn, replace as follows: a. Use a suitable driver and drive the spindle , , bushing, spacer, and oil seal out (toward the top) of the pedestal. b. Place a spacer in the shoulder in the pedestal, and drive a new oil seal into place, using Tool N-506, as shown in Figure 20. Be sure the oil seal is bottomed against the spacer. c. Press a new bushing into place. Be sine the bushing is seated firmly in the recess at the top of the spindle housing. 7. Pull the seal and bearing cup out of the bottom of the pedestal. 8. Using a suitable adapter or hammer and block of wood, install the bearing cup. Insert a new oil seal. D. Pedestal Installation 1. Position the pedestal to the tractor and install the mounting bolts. 2. Tighten the generator adjusting bracket if it was loosened. 3. Install the radiator. E. Pedestal Assembly 1. Install the sector shaft, threaded end first. 2. Insert the pinion gear and rotate the sector shaft and gear until the sector gear and pinion gear engage. Be sure the gears are meshed at the center of gear travel. 3. Place the tapered bearing on the spindle shaft using Bearing Puller 951. 4. Insert the spindle into the housing and push it up into the pinion gear. Be sure the master splines on the pinion and spindle are aligned when the splines are engaged. 5. Place the washer, flat side down, on the spindle and install the nut. Tighten the nut until end play is eliminated, then check to be sure the spindle turns freely. 6. Install the shim pack and cap over the end of the sector shaft With the cap retaining bolts tightened to 25-30 ft. lbs., the backlash between the sector gear and pinion gear should be 0.00050.0035 inch, when wheels are in straight ahead position. Add or remove shims to obtain the proper backlash. 7. Position the spindle arm on the sector shaft and install the lock washer and nut 8. Install the front wheels. 9. Fill the pedestal oil reservoir with the proper lubricant 10. Use a new gasket and install the reservoir cover. 11. Install the tractor grille. Section 4--Row Crop Wide Adjustable Front Axle 353 4. ROW CROP WIDE ADJUSTABLE FRONT AXLE The right and left axle sections and the spindle as semblies used on the wide adjustable front axle are essentially the same as those used on the general pur pose front axle, except that the left and right spindles are reversed to align the keyways for straight ahead steering. For removal and disassembly of the axle halves, refer to Page 341. Figure 22 is an exploded view of the entire wide adjustable front axle. CENTER AXLE AND RADIUS ROD A. Removal 1. Remove the complete axle assembly from the tractor. Refer to Page 347. 2. Disconnect the axle halves from the center axle by removing the four bolts, flat washers, and nuts. 3. The center axle is attached to the axle support with an axle pin that is locked in position in the flanges of the axle support by a lock pin, Insert A, Figure 23. Remove the nut and flat washer from the lock pin and drive the pin out with a drift. 4. Drive the axle pin from the support flanges. 5. The radius rod is held in position between the rear flanges of the axle support by a pin that is locked in place with a roll pin, Insert B, Figure 23. Drive the roll pin out of the flange with a drift, and drive the radius rod pin out, working from the rear of the support. Remove the radius rod pin thrust washer. 7. Lift the axle support off the radius rod and center axle. 8. Disconnect the radius rod from the center axle by removing two bolts and nuts. B. Repair 1. Clean all metal parts in cleaning solvent 2. Inspect the center axle and radius rod for dis tortion or fracture. 3. Inspect the bushings in the center axle and radius rod for damage or excessive wear. RADIUS ROD PIN ROLL PIN THRUST WASHER BUSHING RADIUS ROD CENTER STEERING ARM ROD CLAMP -AXLE SUPPORT -LOCK PIN -CENTER AXLE PIN RADIUS ROD FOOT BOLT ROD END SPINDLE ARM DUST SEAL --WHEEL SPINDLE UPPER BUSHING LOWER BUSHING 3EARING ASST. SPINDLE ASS Y. RIGHT AND LEFT AXLE SECTIONS Figure 22--Exploded View--Wide Adjustable Front Axle T-2106 354 Chapter II--Front Axle Figure 23--Wide Adjustable Front AxleWheels Removed 4. Remove damaged bushings with a suitable puller. 5. Install new bushings with an arbor press. C. Installation 1. Attach the radius rod to the center axle using two bolts and nuts. Tighten them to 75-135 ft lbs. 2. Position the center axle on the axle halves using bolts as guides. 3. Position the axle support down over the radius rod and center axle as shown in Figure 23. 4. Align the axle pin holes in the axle support and center axle, and with the required number of washers on the axle pin, drive the pin into the mounting flange. 5. Insert the lock pin through the fk-mgf; end axle pin., Pif* re ^3. Install the wavfcer and nut and tiglii-an Sjse i- it to c.0-55 ft lbs. & Insert the radius rod pin through the rear sup port flange and into the radius rod. Place the thrust washer on the pin so the hooked projec tion of the washer rests on the rear flange sup port, Figure 23. 7. Using a narrow drift, align the cross hole in the radius rod pin with the holes in the support flange. Drive the roll pin through the hole in the support flange into the cross hole in the radius rod pin. 8. Install the washers and nuts on the axle-half-tocenter axle bolts and tighten them to 220-250 ft lbs. 9. Install the complete front axle assembly to the pedestal, as outlined on Page 347. DRAG LINK ASSEMBLY AND TOE-IN ADJUSTMENT A. Drag Link Assembly Removal 1. Remove the cotter pin and castellated nut from both ends of the spindle connecting rod Figure 24. 2. Use Puller 1001 and Step Plate 630-1 on die spindle connecting rod ends to remove the assem bly from the steering center arm and spindle as.-- IMPf 'RTANT: Do not try to hammer tize irod ends since thread damage will result. 3. To remove the spindle connecting rod end simply loosen the sleeve clamp and turn the rod end out B. Drag Link Assembly Installation 1. Thread the spindle connecting rod ends approxi mately half way into the sleeve. 2. Attach the drag link assembly to center steering arm and the spindle arm, tighten the nuts to 90-130 ft lbs. Use new dust caps if necessary. Section 5--Industrial Front Axle 3. Check the wheel for straight ahead position. Disconnect the spindle connecting rod and screw in or out until straight ahead position is obtained. 4. Adjust toe-in. C. Toe-In Adjustment 1. With the drag link sleeve clamps loosened and the tractor wheels in a straight ahead position, rotate the drag link sleeves as required to pro vide a total toe-in of Vi" to Vz". NOTE: Degree of toe-in should be equal for both front wheels. 2. Toe-in is measured from the outside of the tire ribs, at the hub horizontal centerline, at the front and rear of the tires. 3. Tighten the sleeve clamps to 25-30 ft. lbs. Figure 24--Removing Drag Link 355 5. INDUSTRIAL FRONT AXLE The industrial front axle is a non-adjustable type and is held in the yoke of the front support member by a solid axle pin. The pin is keyed to the support to prevent axle rotation. The wheel spindles are secured to the axle by vertical spindle pins locked in place with spindle locking pins, washers, and nuts. A power cylinder is secured to the left side of the axle and to the right steer ing arm. Figure 25 is an exploded view of the industrial axle. TIE ROD ASSEMBLY AND STEERING ARMS The tie rod assembly controls wheel movement and provides toe-in adjustment of the front wheels. The tie rod is attached to the steering arms with tie rod ends. The steering arms are attached to the wheel spindle assemblies. A. Tie Rod Removal 1. Remove the cotter pin and castellated nut from each tie rod end, Figure 26. 2. Using Puller 1001 and Step Plate 630-1, remove the tie rod ends from the steering arms and withe av the tie rod assembly. N'OT.J: JDi- not hammer on the tie rod ends to free them from the steering arms as thread damage will result. 3. To remove a tie rod end, loosen the tie rod clamp and turn the rod end out. B. Tie Rod Installation 1. Thread the tie rod end approximately half way into the tie rod and install the dust cap. 2. Insert the tie rod end into the steering arm. 3. Secure the right tie rod end with a castellated nut and cotter pin. 4. Position the right front wheel straight ahead, using engine for power if necessary. 5. Check the left front wheel. If the left front wheel is not in a straight ahead position, remove the left tie rod end from the steering arm and rotate the rod end in or out of the tube to obtain straight ahead position. 6. After straight ahead position has been obtained, secure the left tie rod end with the castellated nut and cotter pin. Do not tighten the tie rod clamp. 7. Adjust toe-in. C. Toe-In Adjustment 1. With the tie-rod clamps loosened and the front wheels positioned straight ahead, rotate the tie rod as required to obtain toe-in adjustment of y4"to y2". 2. Toe-in is measured from the outside of the tire ribs, at the hub horizontal centerline, at the front and rear of the tires. 3. Tighten the tie rod clamp nuts to 50-60 ft lbs. STEERING ARM A. Removal Either the left or right steering arm, which is shown in Figure 27, may be removed without disturbing the wheel hub or wheel assembly. 1. Remove the tie rod end from the steering arm. 356 TIE ROD END SPINDLE ARM Chapter II--Front Axle TIE ROD AXLE PIN POWER CYLINDER-' T-2103 Figure 25--Industrial Front Axle NOTE: When removing the right steering arm, disconnect the power cylinder anchor stud from the arm by removing the cotter pin and castellated nut. Lower the cylinder to the floor. 2. Cut the lock wire and remove the three steering arm-to-spindle bolts. 3. Remove the steering arm. B. Installation 1. Position the steering arm to the spindle and in stall the three belts. 2. Tighten thu balls co i...3-160 ft lbs. and install lock vcn'2. 3. Install the rod end to the steering arm. If the power cylinder was disconnected, install it FRONT AXLE ASSEMBLY A. Removal The front axle assembly may be removed from the tractor with or without the wheels installed. 1. Disconnect the right tie rod end 2. Disconnect the power cylinder assembly includ ing the anchor stud, hose connections, and cable control. See Page 299. NOTE: Steps 1 and 2 are necessary to obtain axle pin clearance. 3. Remove the four Phillips head screws and re move the tractor grille. 4. Pass a chain loop through the center hole of the axle support member and secure it with a bolt as shown in Figure 28. Attach the chain to an overhead hoist or lift and take, up the slack. 5. T'mtH'n. a Socr jack under kb* cea&sr of "`he front axis. J?!atse the jack until it teaches the axle. 6. Straighten the tabs on the keyed washer located behind the jam nut on the front of the axle pin. Figure 28. 7. Remove the jam nut, keyed washer, and lock nut from the axle pin. 8. While driving the axle pin rearward, adjust the tractor and axle weight with the hoist and floor jack to remove tension from the axle pin. 9. When the axle pin has cleared the front yoke of Section 5--Industrial Front Axle 357 Figure 26--Removing Tie Rod the support, remove the axle pin front thrust bearing, Figure 29. NOTE: The left front wheel has been removed in Figure 29 for illustration purposes only. 10. Tilt the axle assembly rearward by positioning the jack at the front end of the axle. This will provide axle pin to oil pan clearance. 11. Remove the axle pin, rear thrust bearing, and Woodruff key assembled. 12. Reposition the jack under the center of the axle. CAUTION: If the axle is being re moved without the wheels on the spindle, use an additional jack to support the axle rather than re positioning the jack. 13. Rs ,,:e the front of the tractor to clear the axle as show- in Figure 30, and f all the axle assembly forward with the floor jack. B. Repair Axle bushing wear can be detected before the axle is removed from the tractor. It is good practice to check the axle for excessive play when servicing the front end. There are two bushings in the axle pin bore on the front axle; the front bushing, shown in Figure 30, and the rear bushing, located at the rear of the bore. Both bushings have the same diameter, however, the front bushing is longer. If the bushings are loose, but do not appear to be defective, the looseness is caused by a slight eccentricity of the bushing bores. This problem can be overcome by welding a spot or bead on the inner end of the bush ing bore in the axle. Then notch one end of the bush ing to correspond with the bead and insert the bushing so the weld bead is in the notched area. 1. Inspect the axle for cracks or other defects. 2. Inspect the axle pin bearing surfaces for scoring. 3. Inspect the thrust bearing for cracks or burrs. 4. Inspect the bolt holes for elongation. 5. Inspect the front and rear bushing. If damaged, remove them from the axle pin bore using a cape chisel. 6. iR'ifcAl r new bushing flush with the bore end usir.5 Step Plate 630-12. C. Installation 1. With the front end of the tractor raised sufficient ly for axle and front support clearance, position the axle assembly between the yokes using a floor jack to support the axle. 2. Lower the front end of the tractor so that the yokes on the front support member straddle the axle and the axle pin bore and the holes in the yokes are aligned. 358 Chapter II--Front Axle If the axle pin will not rotate by hand for align ment purposes, remove the strain from the pin by adjusting the hoist and floor jack. 9. Slide the axle pin in until it seats on the rear thrust bearing. 10. Install the lock nut and tighten it to 150 ft lbs. 11. Install the keyed lock washer and bend the three tabs over the flats on the lock nut and install the jam nut 12. Install the right tie rod end, 13. Install the power cylinder, as outlined on Page 299. 14. Install the tractor grille. Figure 27--Removing Spindle Arm 3. Slip the rear thrust bearing on the axle pin. Figure 29, and insert the Woodruff key, Figure 30, in the recess at the rear of the keyway. 4. Insert the axle pin (keyway up) through the rear yoke of the support and tilt the axle assem bly at the rear end with the floor jack. Raise the tractor as necessary to start the pin into the axle pin bore. 5. Reposition the axle assembly with the floor jack and lower the tractor until the axle pin bore aligns with the hole in the front of the support yoke. 6. Position the rear thrust bearing in the rear yoke of the support member as shown in Figure 31. This centers the axle pin and makes further in stallation easier. 7. ^ush the axle pin through the axle bore until the readed end just protrudes from the axle bore. Position the front thrust bearing on the pin. 8. Continue to slide the pin forward until the large OX), of the pin protrudes from the axle pin bore. Position the thrust bearing on the pin as shown in the insert to Figure 31. NOTE: .During the procedure, ike-keyway in the axle pin must line up with the keyway in the front yoke so the Woodruff key can enter ike yoke. WHEEL SPINDLE ASSEMBLY A. Removal 1. Remove the front wheel and hub, as outlined on Page 369. 2. Disconnect the steering arm from the spindle by cutting the lock wire and removing the three bolts. 3. Position the steering arm with the power cylinder and/or tie rod aside, as shown in Figure 32. 4. Remove the nut and lock washer from the tapered locking pin. 5. Drive the locking pin out of the spindle pin from the rear, Figure 32. Figure 28--Removing Axle Pin Jam Nut and Lock Nut FRONLYOKE- Section 5--Industrial Front Axle 359 FRONT THRUST BEARING Figure 29--Removing Axie Pin 6. Drive the spindle pin upward slightly and re move the spindle pin top seal 7. Drive the spindle pin downward, out of the spindle assembly. Lift the spindle assembly off the axle. 8. Lift the thrust bearing off the spindle. B. Repair 1. Inspect the bushings for cracks, burrs, or scoring. If the spindle pin fit was sloppy or any side play was evidenced before disassembly, replace the bushings. Both bushings can be removed and in stalled with Bushing Driver 809, and Handle Figure 31--Axle Installation and Thrust Bearing Placement 814, as shown in Figure 33. The triangular hole in the bushing must be aligned with the hole in the spindle. ; WOODRUFF KEY \ Figure 30--Removing Front Axle Figure 32--Spindle Removal 360 Chapter II--Front Axle ered during front end servicing, they should be replaced. Since the tractor is equipped with full power steering, worn thrust bearings will not impart a drag to steering effort Figure 33--Spindle Bushing Replacement 2. Inspect the spindle for cracks, burrs, or other defects. Inspect the pin sides for wear. 3. If noisy thrust bearings were reported, or discov C. Installation 1. Place the spindle on axle end. 2. Place the thrust bearing between the axle and the lower spindle bore, as shown in the insert in Figure 32. The indentation should be at the top of the bearing as shown. 3. Insert the spindle pin. NOTE: The cross bore in the pin is off center in respect to pin length. One end of the pin is stamped "T". The pin must be installed with the letter "T" facing up. 4. Rotate the spindle pin until the cross bore of the pin aligns with the cross bore of the axle. 5. Drive the tapered pin into the axle cross bore and through the spindle pin. 6. Install the lock washer and nut on the tapered pin and tighten to draw the pin fully into position. 7. Install the top and bottom mud seals on the spindle pin. 8. Install the steering arm with the power cylinder and/or tie rod, tighten to 120-160 ft lbs. 9. Install the front wheel and hub as outlined on Page 369, 6. SPECIFICATIONS TORQUE CHART General Purpose Front Axle Identification Rxdr i Rci to Center Axle Nut............................................................................................................................ KadL 17-cv. Cap to Transmission Nat ............................................................................................................... Axle Half to Center Axle Nut.................................................................................................................................. Center Axle Pin.............................................................................................................................................................. Support to Engine Nut.................................................................................................................................................. Spindle Arm to Spindle Nut.................................................................................................................................... Ft.T.W 75-135 45-50 135-150 200 135-150 60-70 Front End Options Spindle to "Pinion Shaft Bolt (Late Model Pedestal Mounting Bolts).................................................. Row Crop Axle Support to Pedestal Bolt............................................................................................................ Row Crop Steering Arm to Pinion Shaft Bolt................................................................................................. 135-150 150-180 150-180 Section 7--Trouble Shooting 361 TORQUE CHART CONT'D. Row Crop Pedestal Sector Shaft Cap to Pedestal Bolt.......................................................................................................................... Pedestal to Side Rail Nut.......................................................................................................................................... Steering Arm to Sector Shaft Nut.......................................................................................................................... Pedestal Cover to Pedestal Bolt............................................................................................................................. 35-40 150-180 160-180 25-30 Row Crop Wide Adjustable Radius Rod to Center Axle Nut............................................................................................................................. Axle Pin Lock Nut......................................................................................................................................................... Axle Half to Center Axle Nut.................................................................................................................................. Tie Rod to Spindle Arm Nut.................................................................................................................................. Tie Rod Sleeve Clamp Nut....................................................................................................................................... 75-135 50-55 220-250 90-130 35-30 Industrial Tie Rod to End Assembly Clamp Bolt................................................................................................................ Tie Rod to Steering Arm Nut.................................................................................................................................. Tie Rod Clamp Nut...................................................................................................................................................... Steering Arm to Spindle Bolt.................................................................................................................................. Axle Pin Lock Nut......................................................................................................................................................... Spindle Pin Lock Nut................................................................................................................................................. 50-60 150-170 50-60 120-160 150 25-30 7. TROUBLE SHOOTING There are no definite procedures for trouble shooting front axles. A visual inspection should be made to check for bent or sprung members, and for cracks in exterior housings such as center axle, pedestal, and axle halves. Hard steering can be caused by bent or distorted tie rods, steering arms, or spindle arms. Steering drag is usually caused by damaged spindle bearings. All pivot points of the front axle should be checked for end or side play. On "Row Crop" model tractors, check for evi dence of lubricant leakage around pedestal assembly. Check grease fittings for damage and replace as neces sary. Inspect all exposed oil or dust seals for damage or weathering and replace as necessary. Many malfunctions may readily be diagnosed by the description of the trouble as reported by the owner. 8. SPECIAL TOOLS The following special tools will assist in the disassei"&bly and assembly of front axles: Tool Number FT-48 ... Description Tool Set ' t ool Number i CB-3179 N-506 ... T-818 ... Description ... Driver ... Driver Driver Set Part THREE STEERING, FRONT AXLE, BRAKES, WHEELS AND TIRES Chapter III Brakes Section 1 2 3 4 Page Brake Adjustment....................................................................................................................................................................... 362 Pedals, Shaft and Brake Rods.............................................................................................................................................. 363 Brake Camshaft................................'........................................................................................................................................ 366 Brake Overhaul............................................................................................................................................................................ 366 1. BRAKE ADJUSTMENT Series 600 through 1801 Ford Tractors are equipped with mechanical, two shoe, internal expanding type brakes on the rear wheels. The brake assembly is shown in Figure 1. The brakes are controlled through pedals located on the right side of the tractor, and the neces sary linkage to connect the pedals with the brake assem bly at each wheel. The tractor brakes are constructed with bonded linings. Therefore, when linings become worn, the complete shoe assembly is replaced. Each brake is equipped with a locking pawl so that either one or both of the rear wheels can be locked with the brake in the applied position. It is good safety prac tice to apply the brakes and lock them whenever you are working around a tractor with the engine running. Brakes are subject to wear through the course of normal operation. For this reason, particular attention should be given to proper brake adjustment. Brake ad justments are classified in two categories as follows: A minor brake adjustment re-establishes the clear ance between brake lining and brake drum and com pensates for normal lining wear, without any disas sembly consideration. A major brake adjustment includes removal of the rear wheels and brake drums in addition to a close ispection of all parts of the brake system to deter mine whether or not extensive repairs are necessary. A. Minor Brake Adjustment 1. Raise the tractor so that both rear wheels clear the floor. 2. Remove the brake adjusting hole.covers from the brake backing plates. 3. With the brake pedals in the released position, turn the brake adjusting screw clockwise as shown in Figure 2, until there is a noticeable drag on the brake drum as the wheel is turned. 4. Turn the brake adjusting screw counterclockwise until only a slight drag is noticed as the wheel is turned Install the brake adjusting hole cover. Adjust the other brake in the same manner. -SECONDARY SHOE ADJUSTING SCREW SPRING , e* ADJUSTING SCREW , ANCHOR PIN BACKING PLATE RETRACTING SPRING SHOE HOLDDOWN SPRING RETURN SPRING PRIMARY SHOE 331 Figure 7--Brake Assembly 362 Section 2--Pedals, Shaft and Brake Rods 363 Figure 2--Adjusting Brake Shoes 5. Adjust the length of the brake rod at the clevis to bring both brake pedals level. Figure 3. Install the clevis pin and cotter pin and tighten the clevis lock nut. Test drive the tractor to check brake operation. Inspect for overheated drums and, if necessary, re adjust the brakes. B. Major Brake Adjustment 1. Raise the rear of the tractor and place jack stands under each side of the rear axle housing. 2. Remove both rear wheels. NOTE: If the tractor is equipped with wheel weights, it will be necessary to remove the weights before removing the wheels. Refer to Figure 3--Brake Pedals Properly Adjusted Page 376 for information on weight removal. 3. Remove the two screws or three spring nuts that attach each brake drum to the axle shaft and remove the drum. 4. Clean the drums and brake assemblies and in spect for wear. Check the condition of the re tracting springs and the return springs. Weak springs should be replaced. Worn brake linings should be replaced. Scored brake drums should be turned in a brake drum lathe. Depress each brake pedal to make sure the linkage operates freely. All worn linkage should be replaced. 5. Position the drums on the axle shafts and install the attaching screws or spring nuts. 6. Raise the tractor, remove the jack stands, then lower the tractor as necessary to mount both wheels. Install the wheel lug nuts (except trac tors with wheel weights) and tighten them se curely. 7. Adjust the brakes as detailed in Paragraph A. 2. PEDALS, SHAFT AND BRAKE RODS The brake pedals are located on the right side of the tractor on all models, and the shaft and linkage arrange ment is similar, whether the tractor is equipped with a four speed, five speed, or Select-O-Speed transmission. Prior to 1958, the clutch shaft and linkage arrangement on a four speed transmission differs from that of a five speed transmission. Starting with 1958 models, the brake linkage is identical on all models. The brake pedal ar rangement shown in Figure 3 was used prior to 1958. The clutch and brake pedals, plus the necessary link age, are shown in Figure 4. A. Removal 1. Remove the left brake pedal attaching bolt, then remove the pedal from the shaft. 2. Disconnect the brake rod clevis from the lever on the left side of the cross shaft. 364 Chapter til--Brakes -CLUTCH SHAFT BRAKE CROSS SHAFT BRAKE PEDAL CAMSHAFT HOLE COVER CLEVIS PIN SPRING CLEVIS * DOTTED AREAS ILLUSTRATE LINKAGE FOR 1958 AND LATER. L PARKING BRAKE LEVER BRAKE CAMSHAFT BRAKE CAMSHAFT ($3--------- CLEVIS PIN Figure 4--Clutch and Brake Pedals and Linkage--Typical T-2303 3. Slide the cross shaft out from the left side of the transmission. NOTE: If the tractor is equipped with the horizontal exhaust system, it will be necessary to disconnect the rear clamp from the axle housing and lower the outlet pipe to provide clearance. On tractors eqisipp-i-c with four speed transmissions prior to 'he cross shaft slides out of the clutch /?s<dai. 4. Remove the bushings from the transmission case or center housing with Clutch Pilot Bearing Re mover 7600-E. NOTE: Remove the bushings only if they are worn. B. Installation 1. Install the bushings in the transmission case or center housing with Bushing Driver 809 from Bushing Driver Set 818. 2. Coat the cross shaft with Lubriplate and slide it through the left side of the transmission case or center housing NOTE: On models built prior to 1958 and equipped with a four speed transmission, the cross shaft is slipped through the clutch pedal before entering the transmission case. 3. Connect the outlet pipe rear hanger to the axle housing (horizontal exhaust system only). 4. Connect the brake rod to the cross shaft lever with a clevis pin and cotter pin. 5. Secure the brake pedal to the cross shaft with a nut and bolt Section 2--Pedals, Shaft and Brake Rods 365 PARKING BRAKE i PAWL Figure 5--Parking Brake Linkage Installed T-2301 Figure 6--Removing Brake Camshaft Assembly 366 Chapter III--Brakes 3. BRAKE CAMSHAFT A. Removal B. Installation It will be necessary to remove the brake camshaft to replace the right brake pedal, either parking brake lever or either camshaft lever. Figure 4. 1. Disconnect the parking brake pawl control rod from the parking brake lever, Figure 5. 2. Disconnect the brake rod from the camshaft lever (left side only). Disconnect the taillamp wire from the clamps on the camshaft (left side only). 3. Raise the tractor until the rear wheel just clears the floor. Remove the nuts that attach the rear axle bearing retainer to the axle housing "All Purpose" tractor. Remove the nuts that attach the final drive housing to the axle housing "Row Crop" tractor. 4. Slide the rear wheels out just far enough to free the inner end of the camshaft from the center housing. 5. Carefully work the camshaft out of the brake backing plate, Figure 6. 1. Transfer all serviceable parts from the old cam shaft onto the new one as shown in Figure 4. After the Woodruff key and lever is installed, torque the bolt to 60-80 ft lbs. 2. Coat both ends of the camshaft with a light film of Lubriplate. 3. Work the flat end of the camshaft into place in the brake backing plate. Align the ball end with the socket in the center housing. Push the wheel inward until the ball on the camshaft is seated in the socket. 4. Install and tighten the axle shaft bearing retainer or final drive attaching nuts to 130-150 ft lbs. torque. 5. Connect the brake rod to the camshaft lever with a clevis pin and cotter pin (left side only). Con nect the taillamp wire and secure it to the cam shaft with two attaching clamps (left side only). 6. Connect parking brake control rod to the parking brake lever with the retaining clip. 4. BRAKE OVERHAUL A major or complete brake overhaul becomes neces sary only when a readjustment of the brakes will not restore them to proper working order, or when they have been allowed to deteriorate through lack of ade quate service. A. Removal 1. Raise the tractor and install jack stands under the rear axle housing. NOTE: The brake assemblies for each wheel are the same except for the brake shoe return springs. The right brake has two return springs; the left brake, only one. 2. Remove the rear wheels. 3. Remove the brake drum attaching screws or . spring- nuts from each drum and remove the, brake drums. 4. Disconnect the brake shoe return springs and the retracting spring from the brake shoes, Fig ure 7. 5. Remove the two anchor pin retainer clips and slip the anchor pins out of the brake backing plate. 6. Remove the anchor pin collar,' brake shoe hold down spring, cups and pin from each brake shoe. 7. Expand the brake shoes at the upper end and remove them from the backing plate as an assembly. 8. Separate ft.* shoes from tu* adjusting screw as sembly and spring. B. Inspection 1. Replace brake shoes that are worn or damaged. 2. Replace springs that are broken or distorted. 3. Turn the brake drums in a brake drum lathe if scored. Section 4--Brake Overhaul 367 DUST SEAL BACKING PLATE ANCHOR PIN COLLAR ANCHOR PIN [--RETAINER CUP BRAKE SHOE X RETRACTING SPRING BRAKE SHOE RETURN C SPRING ADJUSTING HOLE < COVER BRAKE SHOE HOLD DOWN SPRING PIN BRAKE SHOE HOLD DOWN SPRING SPRING CUP ADJUSTING SCREW SPRING ADJUSTING SCREW SOCKET ADJUSTING SCREW ADJUSTING NUT BRAKE SHOE AND LINING T 230S Figure 7--Brake Shoes and Related Parts IMPORTANT: Do not remove stock in excess of 0.050". 4. Replace worn anchor pins or damaged retainer clips. C. Installation 1. Lubricate the shoe bosses on the brake backing plate with Lubriplate. Also, apply a light film on the shoes where they contact the anchor pin collars. Lubriplate the adjusting screws. 2. Connect the adjusting screw spring, Figure 7, to each shoe, then install the adjusting screw as sembly. Position an anchor pin collar in each shoe. 3. Position the brake shoes on the backing plate and install the brake shoe hold down spring pin, spring and two cups on each shoe as shown in Figure 7. 4. Install the two anchor pins and retainers. 5. Install the brake shoe retracting spring and re turn springs. 6. Install the brake drums and secure each drum with the attaching screws or spring nuts. 7. Install the rear wheels and adjust the brakes as detailed on page 362. Part THREE STEERING, FRONT AXLE, BRAKES, WHEELS AND TIRES Chapter IV Wheels and Tires Section Page 1 Wheel Bearings................................................................................................................................................................. 369 2 Wheel Sparing--Tread Width...................................................................................................................................... 369 3 Wheel Weights.................................................................................................................................................................. 375 4 Tires....................................................................................................................................................................................... 378 5 Specifications...................................................................................................................................................................... 379 6 Special Tools...................................................................................................................................................................... 380 The front wheels on Ford Tractors are of the pressed steel disc type, and are equipped with pneumatic tires. Each front wheel is mounted on a hub provided with two tapered roller bearings. There are several different rear wheels available for the Ford Tractor as detailed in the REAR WHEEL CHART below. To meet the various operating conditions, the tread width of both the front and rear wheels may be adjusted (excluding single front wheel "Row Crop" and "Industrial" tractors). With the exception of the 600 lb. weighted wheel, weights may be used on the wheels. Calcium chloride may be added in the tires to provide additional traction. RIM SIZE 8x42 9x28 9 x 38 10x28 10x28 ' lx c 28 RIM PART NO. 310715 NCA-1020-C 313559 NCA-1020-B NCA-1020-B REAR WHEEL CHART DISC PART NO. NCA-1122-A NCA-1122-A 313555 NCA-1122-A 312223 SERIES APPLICATION 700, 701, 900, 901 600 thru 801 700, 701, 900, 901 600 thru 1801 800, 801, 1801 NDB-1020-B : NDSH-im-B 600 thru 901 11 x 38 12 x 24 313953 311724 12 x 28 *With spacer. 313197 313555 311701 NCA-1122-A 700, 701, 900, 901 600, 601, 800, 801, 1801 800, 801, 1801 368 REMARKS High Clearance Tractors High Clearance Tractors Available only as production option Power adjusted whe< s, standard on 90Q-90T, optional on 600 thru 801* High Clearance Tractors Section 2--Wheel Spacing--Tread Width 369 1. WHEEL BEARINGS The front wheel hubs on all models are mounted on the wheel spindles by inner and outer tapered roller bearings. Starting with Serial No. 137818, a new front wheel hub was used on the "General Purpose" tractors. The overall dimensions of the wheel bearings used in the new hub are different than the bearings previously used. However, the complete hub assemblies are inter changeable on the spindles. A grease seal is provided at the inner end of the hub, and a threaded hub cap at the outer end, to exclude dirt and retain the lubricant NOTE: The hub caps on "Industrial" models are friction type caps and are driven into the hub in stead of being threaded. The rear wheel bearings on all models of the Ford Tractor are tapered roller bearings. Each bearing is enclosed in the bearing retainer. Rear wheel bearing removal may be necessary at the time of rear axle over haul. The procedure for replacing the rear wheel bear ings is detailed on Page 259 under REAR AXLES. A. Front Wheel Bearing Adjustment To check wheel bearing adjustment jack up the front of the tractor, grasp the tire at the sides and move it in and out If any looseness is felt, adjust the front wheel bearings as follows: 1. Remove the hub cap. 2. Remove the cotter pin from the wheel bearing nut 3. Tighten the nut while rotating the wheel back and forth, until a noticeable drag is felt This will properly seat the bearings in the bearing cups. 4. Back off the retaining nut until the nearest slot in the nut is in alignment with the hole in the spindle (about % to V4 turn). Lock the nut in this position with a new cotter pin. 5. Install the hub cap and tighten it securely. B. Front Wheel Bearing Replacement 1. Remove the hub cap from the outer end of the spindle. 2. Remove the cotter pin, the wheel bearing nut, and flat washer. 3. Slide the wheel and hub assembly off the spindle carefully, until the outer bearing is near the end of the spindle. Then, remove the outer bearing. Remove the wheel and hub assembly. Then, re move the grease seal and inner bearing from the hub. 4. If the bearing cups in the hub show signs of wear, scoring, or other damage, use a suitable puller to remove them. 5. Press the bearing cups carefully into the hub until they bottom. 6. Pack the inner bearing with M-46-64 wheel bear ing grease and position it in the hub. Install the grease seal in the hub. 7. Slide the wheel on the spindle carefully, to avoid damaging the grease seal. 8. Pack the outer bearing with grease and position it in the hub. 9. Install the flat washer and nut Adjust the bear ings and install the cotter pin. See A above. In stall the hub cap. 2v WBI.3L SPACS!HS'--TRFAD WIDTH All front wheels on Ford Tractors with the exception of the single wheel "Row Crop" and "Industrial" models, are adjustable. The design of the Ford Tractor permits adjustments to meet most requirements. The front wheel tread width on dual wheel "Row Crop" tractors is norm ally 8.3 inches. By changing the wheels so that they dish out instead of in, the tread width can be increased to 16.3 inches. When working listed crops, the wide setting will make it easier to keep the front wheels on the ridges. It will also prevent the accumulation of mud between the wheels in wet or sticky soil. A. Front Wheels The adjustment procedure for the front wheels on "Row Crop" tractors equipped with an adjustable axle 370 Chapter IV--Wheels and Tires FOR TREAD WIDTH (INCHES) 52 56 60 64 6B 72 76 eot UNE UP HOLE A AND HOLE NO* 52 56 60 64 68 UNE UP HOLE AND HOLE NO. 72 76 72 SPACE BOLTS APART (INCHES) 8 Yx Q'A 6% QVx 8V4 6% 4 Vi 6% SET RAOtUS ROD TO HOLE C c D D D D D D RADIUS RODS SPREAD (INCHES) 29.08 29.08 40.82 40.82 40.82 40.82 40.82 40.82 Figure 7--Front Wheel Tread Adjustments-- General Purpose Tractors is the same as the "General Purpose" tractors with the exception of the tie rods. The front wheels are adjustable from 52 to 76 inches in 4 inch increments. To change the tread width, proceed as follows: 1.Raise the front of the tractor until the wheels clear the ground. Remove the two bolts from one axle, Figures 1 and 2. 4-"WHEEL SET AT" *-- WHEEL SET AT MINIMUM TREAD 1 MAXIMUM TREAD WIDTH WIDTH 038 Figure 3--Front Wheel Tread Adjustments--Row Crop Tractors Row Crop Models: Remove the bolt and lock washer from the tie rod outer clamp, Figure 2. 2. Position the axle at the desired tread width and install the two axle attaching bolts. Relocate the radius rod as necessary, Figure 1. IMPORTANT: Always leave one or more open boh holes between the axle bolts. Row Crop Models: Position the front wheel straight ahead and align the hole in the outer clamp with the Figure 2--Adjustable Front Axle--Row Crop Tractors Figure 4--Manually Adjusted Rear Wheels Section 2--Wheel Spacing--Tread Width INTER-CHANGING REAR WHEEL ASSEMBLIES GIVE THESE COMBINATIONS 371 ON OPPOSITE DISC Figure 5--Rear Wheel Tread Width Adjustments-- General Purpose Tractors ON OPPOSITE DISC groove in the tie rod nearest to the outer clamp hole, Figure 2. Install the bolt and lock washer to lock the tie rod in the sleeve. NOTE: A tread width of 80 inches can be obtained by reversing the wheels (dish out) and setting the tread width at 72 inches. 3. Check the front wheel toe-in and if necessary, adjust to V4-V2 inch as detailed on page 355. FU Mastr --. i ` Tted Rear 'Manually adjusted rear wheels are standard equip ment on all 600 thru 801 Series tractors and all "Industrial" tractors. The wheel disc is secured to the rim by six bolts, Figure 4, and may be adjusted for the desired tread width as follows: 1. Support the tractor with a jack and remove the wheel. ----- NOTE: When changing tread width, par ticular attention should be given to the posi tion of the wheel disc (whether it is inside or outside of the rim lugs), as this will affect the tread width. 2. Remove the six bolts and nuts and position the rim as desired. Refer to Figure 5 for "General Purpose" tractors. Figure 7 for "Industrial" tractors, or Figure 6 for "Row Crop" tractors, to obtain proper location of rim for desired tread width. Install the six rim bolts, lock \rtasiietv and nuts, and tighten them securely. Install the wiif-il o i the tractor and repeat this procedure for t;.e other wheel. C. Power Adjusted Rear Wheels Power adjusted rear wheels are standard equip ment on all 900 and 901 Series tractors. Power adjusted rear wheels are available as optional equip ment on 600 thru 801 Series tractors. It is essential that a Rear Axle Extension, Part No. NCA-1222-A be used between the end of the axle and wheel on 372 Chapter IV--Wheels and Tires INTER-CHANGING REAR WHEEL ASSEMBLIES GIVE THESE COMBINATIONS Figure 6--Rear Wheel Tread Width Adjustments-- Row Crop Tractors "General Purpose" tractors equipped with power ad justed wheels. The extension will prevent interference between the wheels and fenders when the wheels are set at the minimum width. The rear wheels may be moved to any desired width in the tread range of 56 to 76 inches without raising the tractor wheels, Figure 8. Tread widths of 64 to 84 inches can be obtained by reversing the wheels, Fir'ire 9. Engine power is utilized to move the wheel L. and out Changing the tread width with a power adjusted wheel is similar to turning a bolt in a nut. The rim acts as the nut, with slotted channel bars which serve as threads. The wheel disc acts as a bolt having a heli cal shape with a 2 inch pitch. Bach wheel must be adjusted separately. The different tread widths pos sible with the power adjusted wheel are shown in Figure 8. Each complete revolution of the wheel changes the tread width 2 inches. By placing the spacer clamp in other channels on the rim, spacings in V2 inch increments can be made as follows: 1. Position the wheel so that the spacer clamp is at the top of the wheel as shown in Figure 10. 2. Loosen the nut on each of the three locking clamps, Figure 10. Slide the clamps toward the hub of the v.hi.sl rnd then tighten the nuts to hold the clamps in Lvs retracted position. 3. Loosen the large nut on the spacer clamp. Loosen the small knurled nut and turn the small bolt so that the special head will come through the opening in the wheel disc. Remove the large nut and remove the clamp from the wheel. 4. Place the spacer clamp in the channel thread bar for the desired setting, as shown in Figure 8. Insert the oval head bolt in the channel slot, turn it so that the bolt head is secure in the Section 2--Wheel Spacing--Tread Width 373 Industrial with 24" Cast Wheels channel slot Be sure the knurled nut is tight ened securely. move them into the driving position in the thread channel. Tighten all clamp nuts securely. 5. Move the wheel by engaging the transmission with the engine at idle speed. Brake the oppo site wheel and let the tractor creep while the wheel disc is revolving, then disengage the trans mission immediately when the wheel strikes the spacer clamp, Figure 12. NOTE: Effective with Serial No. 121557, an improved rear wheel was used. All older wheel parts are interchangeable with the new wheel with the exception of the wheel rim clamps. The wheel rim clamps must be used with their respective wheels. 6. Move the tractor so that the spacer clamp can be replaced at the top of the wheel. 7. Remove the spacer clamp from the channel bar by loosening the knurled nut and turning the uov.'n 1 bolt Vi turn. 8. Use the spacer clamp as the fourth wheel lock ing clamp. Place the clamp on the bolt wife fee lug in the holding slot and fee small bolt head through fee wheel disc. Install fee large nut and washer and tighten the nut securely. Tighten fee small knurled nut The spacer clamp used as a driver clamp is shown in Figure 11. 9. Loosen fee nuts on the three driver clamps and IMPORTANT: The clamp nuts should be tightened again after the tractor has been used for a short period of time. D. Charirmig i.'ear Wheel Discs When wheel settings greater than 76" are required, spacings of 80 or 84 inches can be obtained. Set fee spacing at 56 inches for 84 inch wheel spacing and 60 inches for 80 inch spacing; then, reverse the wheels on the tractor as follows: 1. Loosen the wheel lug nuts at each rear hub. 2. Raise the rear of the tractor and be sure it is firmly supported. 374 ISi"" * Jr_"t^l- !, ` lv- Chapter IV--Wheels and Tires JS LOTTED CHANNEL BAR Figure 9--Tread Widfh Adjustments--Wheels Reversed Interchange the wheels, so that they dish L.u The rrrow on the side wall of the tire should afw ys point in the direction of forward rotation of the wheel. Install all the lug nuts and tighten them securely. NOTE: With the wheels reversed (dished in), it will be necessary to work from the inside of each wheel when making adjustments. Figure 9. Refer to Power Adjusted Rear Wheels for the detailed procedure. Section 3--Wheel Weights 375 3. WHEEL WEIGHTS Wheel weights are available for use on both the front and rear wheels of all Ford Tractors except the "Indus trial" models. Only the rear wheel weights are provided for "Industrial" models. Front wheel weights are easily attached with two bolts through each section. The front wheel weights come in two sections, each of which weighs 50 lbs. and covers half of the wheel. The weights mount on the inside of each front wheeL Additional wheel weights are now provided for rear wheel; Part No. 312223. A weight box, which can be mounted on the front of "Row Crop" tractors equipped with single or dual wheels, is also available. Wheel weights are not used on the front wheels of the Ford Industrial Tractor. only, add 1160 lbs. to the tractor when a mounting plate and 12 segments are installed on each wheeL The weight mounting plates weigh 68 lbs. There are optional 13 x 24 and 14 x 24 rear wheels which in corporate malleable cast iron wheel discs. Regular duty wheel weights can be used with these discs pro viding that the wheels are set for 56" tread width spacing and two each NCA-1222-A, 4 inch wheel ex tensions are used on each wheeL Both Regular Duty and Heavy Duty Weights are mounted as follows: 1. Remove one wheel lug nut; and install the weight mounting plate stud as shown in Figure 13. Re peat this procedure until all lug nuts are re placed, then tighten the plate studs securely. A. Rear Wheel Weights Rear wheel weights are available in two sizes; Regular Duty Weights weighing 30 lbs. each and Heavy Duty Weights weighing 45 lbs. each. The regu lar or heavy duty weight segments can be used on die standard 12x28 rear wheels. The Regular Duty Weights add 800 lbs. to the tractor when a mounting plate and 12 segments are installed on each wheeL The Regular Duty Weights are recommended for use on Series 600, 601, 700, 701, 900, and 901 tractors. Heavy Duty Weights, for Series 800 and 801 tractors 2. Position the weight mounting plate on the studs with one of the raised ears on the plate centered on the valve stem. Install the lug nuts previously removed as shown in Figure 14, and tighten them securely. 3. Install each weight on the plate with the bolt provided, Figure 15. Do not tighten the bolts until all desired weights have been installed, then tighten all bolts securely. Figure 13--Weight Mounting Disc Studs Installed 376 Chapter IV--Wheels and Tires Figure 14--Weight Mounting Plate Installed NOTE: The weights can be mounted to give a little added weight or full weight; however, they must be added so that the wheel remains balanced. Three different combinations are shown in Figure 16. Figure 16--Wheel Weight Combinations Weights can be removed one at a time, or by re moving one weight and installing an eye bolt in the weight mounting hole for attaching the mounting plate to a hoist. If a hoist is used, merely remove the mount ing plate lug nuts and swing the entire weight assem bly away from the wheel. Replace the mounting plate studs one at a time with the wheel lug nuts and tighten all lug nuts securely. B. Weight Box The weight box for single or dual wheel `Row Crop" tractors is secured to the front of the pedestal with mil COVER " -&&&& wm&as Figure 15--Installing Weights on Plate 3414 Figure 17--Front Weight Box Installed--Row Crop Tractors Section 3--Wheel Weights 377 4 bolts. The box weighs 130 lbs. and the inside is channeled for adding up to six weights of 48 lbs. each. The cover is hinged at the bottom front of the box and is secured with 2 bolts as shown in Figure 17. The weight box, when loaded, adds approximately 420 lbs. to the front of the tractor. FORD TRACTOR WHEEL WEIGHTS FORD TRACTOR WHEEL WEIGHTS FRONT (Per Tractor Set) Wheel Weights--Inside mounted Two per wheel--50 lbs. each Total--200 lbs. REAR (Per Tractor Set) Regular Duty Weights Two Mounting Discs--34 lbs. each Segments--(24) 30 lbs. each Bolts--12 lbs. Total--800 lbs. *Heavy Duty Weights Two Mounting Discs--34 lbs. each Segments--(24) 45 lbs. each Bolts--12 lbs. Total--1160 lbs. SERIES 600-601 Farm Industrial Use Use SERIES 800-801 Farm Industrial Use Use SERIES SERIES 700-701 900-901 Standard Power Adj. Wheels Wheels X XX X * * XX XX XX *Use Front Weight Box on Single and Dual Wheel Row Crop--Box weighs 130 lbs. Six Segments--48 lbs. each--Total 420 lbs. with weight box attaching bolts. C. Liquid Weighting Tires One of the most commonly used methods of adding weight to tractors is to fill the tires with a calcium chloride solution. A calcium chloride solution is used because of its lower freezing point, and greater weight per gallon than water. Calcium Chloride Anti-Freeze Solution: Protection to a temperature of --60 F. is obtained by mixing 5 lbs. of calcium chloride per gallon of water. This formula makes 1.25 gallons of solution. Never use more than 5 lbs. of calcium chloride per gallon of water. The liquid capacity of the tires with a 90% fill is as follows: Tire Size 9:00 x 10-- 5:50 x 16-- 6:00 x 16-- 6:50 x 16-- 7:50 x 16-- FRONT Gals, of H,0 9 4.5 5.2 5.9 9 Lbs. of CA. CL2 45 22.5 26 29.5 45 Total Weight 120 60 69 79 120 Tire Size 10:00 x 28-- 10:00 x 38-- 11:00 x 28-- 12:00 x 28-- 12:00x38-- 13:00x24-- 13:00x28-- 13:60x28-- 14:90 x 24-- 14:90 x 28-- REAR Gals, of HiO 24 31 32 39 51 44 49 39 44 49 Lbs. of CA. CL2 122 157 160 197 257 219 246 197 219 246 Total Weight 324 416 426 525 685 584 648 525 584 648 CAUTION: Toxic fumes and intense heat, caused by combining calcium chloride and water, may be injurious to the operator. Always put water in the barrel first and add the calcium chloride slowly, as outlined below: 1. Fill a 55 gallon steel barrel with the proper amount of water for the tire being filled. 378 Chapter IV--Wheels and Tires 2. Add the calcium chloride slowly. Add 1 lb. of hydrate of lime per 100 lbs. of calcium chloride to prevent caking. 3. Use a wood paddle and mix thoroughly. Allow the solution to cool until you can hold your hand against the side of the barrel comfortably. Filling and Emptying Tires: Several good types of equipment are available for use in filling and empty ing tires. The exact procedure used will depend on the type of equipment available. For this reason, no attempt is made here to give detailed instructions on filling the tires. CAUTION: No matter what type of equipment is used, be sure it is well grounded before any elec trical connections are made. Maximum Weights: Weights added to the tires, to gether with the weight of the mounted implement and tractor, should not exceed the recommended weight to be carried by the tires. The table in Section 5 lists the maximum recommended weight that can be carried without overloading the tires. 4. TIRES All Ford Tractors are equipped with either direc tional (cleats) or non-directional tires. Tire size, of course, varies according to tractor size. Tire removal and installation procedures are the same for front and rear wheels. A. Tire Removal--Excluding Single Front Wheel 1. Remove the wheel from the tractor and deflate the inner tube completely. 2. Press the valve through the valve hole, toward the inside of the tire. 3. Loosen both tire beads from the wheel rim, with a tire iron and a heavy mallet as shown in Fig ure 18. 4. With the wheel lying flat, stand on the tire with your feet about 15 inches apart; opposite the valve, then force the bead seat into the drop center of the rim. 5. Insert two tire irons, about 8 inches apart, be tween the tire bead and the wheel rim near the valve, then pry the bead over the wheel rim. 6. Leaving the one tire iron in position, follow around the wheel rim with the other tire iron to remove the remainder of the bead. Remove the inner tube. 7. Turn the wheel over and block the rim up off the floor as shown in Figure 19. Pry the wheel out of the tire, starting with a small section and following around the wheel. B. Tire Installation--Excluding Single Front Wheel 1. Place the wheel and rim on the floor in a fiat position. 2. Inflate the inner tube until it is barely rounded out, then install the tube in the tire. 3. Coat the inside and outside of the tire beads with a soap solution to protect the bead, then pry one bead over the edge of the rim. 4. Be sure the valve extends through the rim prop erly, then pry the other bead over the rim. 5. Inflate the tire to the recommended pressure or fill the tire with calcium chloride solution, as desired. Figure 18--Loosening Tire Bead from Edge of Rim Figure 19--Prying Wheel .Out of Tire Section 5--Specifications 379 C. Tire Removal--Single Front Wheel 1. Raise the front of the tractor until the wheel is clear of the floor. 2. Turn the dust cap counterclockwise until it is free of the hub. 3. Remove the cotter pin, castellated nut, flat washer, and outer bearing. 4. Carefully remove the wheel from the spindle. 5. Remove the valve core from the inner tube to deflate the tire. CAUTION: Failure to remove all the air be fore disassembling the wheel could result in personal injury due to the rim halves flying apart. 6. Remove the five bolts from the wheel and thread two of the bolts in the opposite side of the wheel. Turn the bolts in until the flange is free of the hub as shown in "A," Figure 20. 7. Remove the flange from the tire with tire irons as shown in "B," Figure 18. 8. Lift the tire off the hub and remove the tube liner and tube as shown in "C," Figure 20. 9. Remove the two bolts from the flange. D. Tire Installation--Single Front Wheel 1. Install the valve core in the inner tube. Inflate the tube until it just starts to round out 2. Install the inner tube and tube liner in the tire. Place the hub in the tire while guiding the valve stem through the hole provided in the hub. 3. Install the flange in the tire and rotate it as neces sary to align the five bolt holes. 4. Install the five flange attaching bolts. Tighten the five bolts evenly and alternately. 5. Inflate the tube to 44 pounds pressure. 6. Position the wheel on the spindle and install the outer bearing, flat washer, and castellated nut. 7. Tighten the nut until a slight drag is felt while rotating the wheel, then back the nut off one castellation (% to % turn). 8. Install a cotter pin and the dust cap. X i Tire Size REAR: 10-28 4-ply 10-38 4-ply 11-28 4-ply 12-28 4-ply Figure 20--Removing Tire from Single Front Wheel Inflation Pressure 16 16 14 14 5. specifics: Maximum Lbs. Tire Load Per Wheel 1860 2155._ 2070 2430 Tire Size REAR: 12-38 4-ply 12.4-28 4-ply 13-24 4-ply 13.6-28 4-ply Inflation Pressure 14 14 14 14 Maximum Lbs. Tire Load Per Wheel 2420 2070 2470 2430 380 Tire Size REAR: 14-24 6-ply 14.9-24 4-ply 14.9-28 4-ply FRONT: 5:50-16 4-ply 6:00-16 4-ply 6:50-16 6-ply 9:00-16 8-ply Inflation Pressure 16 18 . 14 28 20 28 40 Chapter IV--Wheels and Tires Maximum Lbs. Tire Load Per Wheel 3560 3125 2630 1060 755 1050 1620 Tire Size FRONT: 7:50-16 8-ply Inflation Pressure 44 Maximum Lbs. Tire Load Per Wheel 2390 Tread Width Series 601 and 801 front tire width 52-76 inches ^Series 601 and 801 rear tread width 52-76 inches Series 701 rear tread width 56-84 inches* Series 901 rear tread width 56-84 inches** *Bolting disc to alternate rim flanges, reversing rim and reversing disc. **Power Adjusted Wheels--discs reversed. 6. SPECIAL TOOLS The special equipment required to service wheels and tires, is an electric liquid weighting pump and an air liquid pressure gauge. The tire repair department should be located near a water outlet for weighting the tires and should be provided with an overhead hoist to han dle the wheels and tires safely and with a minimum of effort. PART FOUR HYDRAULIC SYSTEM Chapter I Section 1 Operating Principles Operating Principles Page ..................................................................................................................................................... 381 1. OPERATING PRINCIPLES Figure 1, illustrates the Ford Tractor Hydraulic Sys tem. Mounted on the outside of the lift cover are the lift arms, touch control lever, selector lever, and the main control spring. The hydraulic pump is mounted on the right rear side of the tractor engine and is driven by a gear mounted on the rear of the camshaft. The tractor center housing acts as the reservoir for the hydraulic system. The control mechanism such as TOUCH CONTROL LEVER SELECTOR LEVER \ SAFETY VALVE, BACK PRESSURE VALVE CHECK VALVE LIFT ARM DRAFT CONTROL ROD DRAFT CONTROL SPRING Figure 7--Hydraulic System--Draff Control Position 381 T-2731 I 382 Chapter I--Operating Principles the various valves, linkage, and ram cylinder are located on the underside of the lift cover in the reservoir or tractor center housing. A. External Controls Touch Control Lever: Raising or lowering of the lift arms is controlled by the touch control lever located on the right side of the lift cover, Figure 1. Raising the touch control lever, pivots the hand control lever which moves the control valve through linkage, into the intake (forward) position. Oil is then pumped into the ram cylinder, to raise the lift arms or implement. Lowering the touch control lever pivots the hand control lever which moves the control valve through linkage into the exhaust position (rearward), Figure 2. This will exhaust the hydraulic oil from the ram cylinder to lower the lift arms or implement. Selector Lever: The selector lever (draft or position control) is located on the right side of the lift cover below the touch control lever. Figure 2. This lever permits the use of constant draft or implement posi tion control. With this lever in the down position (draft control), the implement will be lowered to the. ground as soon as the touch control lever is moved off the upper stop. However, after the tractor is in forward motion, the draft from the attached imple ment will automatically actuate the control valve through the tractor upper link to maintain a constant working draft on the tractor. With the selector lever in the "UP" position (posi tion control), the constant draft control is locked out by mechanical linkage. The lift arms or implement is then fully controlled by the movement of the touch control lever. TOUCH CONTROL LEVER SAFETY VALVE BACK PRESSURE VALVE CHECK VALVE LIFT ARM HYDRAULIC SERVO CAM RAM ARM POSITION CONTROL ARM POSITION CONTROL ROD AND SPRING PUMP PRESSURE LINE Figure 2--Hydraulic System--Position Control T-2732 Section 1--Operating Principles 383 SAFETY VALVE BACK PRESSURE VALVE. CHECK VALVE. ' !*- PRESSURE LINE KEY OIL WITH CYLINDER PRESSURE SJ OIL WITH BACK PRESSURE CYLINDER EXHAUST AND RETURN OIL D INTAKE OIL T-2733 Figure 3--Oil Flow--Neutral Position Moving the touch control lever downward allows the control valve to move to the rear under spring pressure. With the control valve in this position, the oil is exhausted from the cylinder until the cam con tacts the hand control lever and returns the control valve to the neutral position. The life arms will remain in this position until the touch control lever is moved to another position. B. Hydraulic Control System Description The hydraulic system consists of two major units, namely; the hydraulic pump and the lift cover. The lift cover incorporates the lift cylinder, the control valves and mechanical linkage. The function of each valve must be thoroughly understood to understand how the oil flow through the system is controlled. Following is the purpose and the function of each of the six valves in the system: Relief Valve: The relief valve, Figure 2, protects the pump and the hydrsux sysfce: against pressure ex ceeding 20SJ0 p.?:i This valve functions only when the pressure exceeds the maximum limit I Check valve: The check valve, Figure 2, is a one-way valve designed to hold the oil in the lift cylinder and to hold the lift arms in a raised position. The valve operates only during a raising cycle. A pressure of -- approximately 115 psi is required to unseat the valve. Safety Valve: The safety valve, Figure 2, is to protect the lift piston and cylinder from damage due to shock 384 Chapter i--Operating Principles RAM CYLINDER SAFETY VALVE BACK PRESSURE VALVE CHECK VALVE PUMP UNLOADING VALVE PUMP PRESSURE LINE KEY OIL WITH CYLINDER PRESSURE ED OIL WITH BACK PRESSURE CYLINDER EXHAUST AND RETURN OIL E! INTAKE OIL T-2734 Figure 4--Oil Flow--Lowering Position loads resulting from carrying heavy implements over rough terrain with the control valve in the neutral position. Control Valve: The control valve, Figure 2, directs the flow of oil for raising or lowering an implement When in draft control, force applied to the control spring actuates the valve. When in position control, the cam on the lift arm actuates the vs! >e. Unloading Valve: The unloading valve, Figure 2, is hydraulically operated. The position of this valve determines whether the oil from the pump is directed to the lift cylinder to raise an implement or is by passed to the reservoir. Back Pressure Valve: The back pressure valve, Figure 2, is to maintain a constant pressure of low magnitude in the system for positioning the unloading valve. Increased tractor hydraulic system sensitivity and durability which are desired in certain implement applications can now be obtained by using new special control valves, control valve bushings and an external ly mounted hydraulic system filter which are avail able for service only. The control valve, control valve bushings and filter can be installed on all Ford Trac tors with the current type hydraulic system. Increased sensitivity is provided by the new cor&'ol valve and bashing in the following manner. Tbs h'ffc land of the control valve is chamfered so that less reaction on the top link is required to move the con trol valve forward to a lift position. This, in effect* means that corrections required by changing draft conditions will be of a smaller magnitude. A smaller diameter hole, on both the inlet and outlet sides of the unloading valve, means that as oil is introduced to the valve, the pressure build-up in the system will. Section 1--Operating Principles 385 be at a slower rate. Thus, the smaller magnitude cor rections brought about by the new control valve will be slower and smoother. A slot incorporated in the bushing in place of the drop orifice, and a new orifice in the discharge line increases the rate of drop of an implement The rate of drop is faster because as soon as the draft reaction to the top link decreases and the control valve moves to a lowering position, the entire area of the drop orifice is exposed. It is recommended that whenever the new control valve and control valve bushing are installed in a tractor that the hydraulic filter also be installed. The filter also can be installed on tractors where old style hydraulic parts are used and where increased sensitiv ity, provided by the new hydraulic parts, is not required. C. Hydraulic Control System Oil Flow Neutral Position: Since the pump is continuously de livering oil to the hydraulic system whenever the engine is operating, the oil will be returned to the reservoir as follows: With the control valve in neutral, oil is pumped into the pressure line which incorpo rates the combination back pressure and check valve seat passage. A drilled hole and annular ring makes this section a common passage to the check and back pressure valves. The check and back pressure valves are closed, therefore, oil will flow down the passage leading to the unloading valve chamber. It will con tinue to flow around the annular ring in the forward bushing and apply pressure against the rear face of the unloading valve to hold it in the unload position. The oil will continue to flow down around the annular ring in the control valve bushing to fill the annular ring and trap the oil. RAM CYLINDER SAFETY VALVEBACK PRESSURE VALVECHECK VAL\ f>} PRESSURE LINE INTAKE^ LINE KEY OIL WITH CYLINDER FRESSURE OIL WITH BACK PRESSURE CYLINDER EXHAUST AND RETURN OIL INTAKE OIL T-2735 Figure 5--Oil Flow--Raise Position 386 Chapter I--Operating Principles With the unloading valve being in the forward posi tion, pressure will build up in this passage until the back pressure valve, which offers less resistance than the check valve, is forced off its seat. The oil will then flow down this passage and make a "U" turn at the unloading valve. The "U" turn is made due to the control valve land ports and annular rings. The annular ring provided in the check and the back pressure seat provides the oil return passage back to the reservoir. Moving the unloading valve forward, opened up the "U" turn for the return oil. Any oil in front of the unloading valve would be forced out through the passage in front of the control valve through the spring area and out through a port located in the front end plate down into the reservoir. Lowering Position: In the lowering position, oil is re turned to the reservoir in the same manner as detailed in the neutral position. In addition, oil is exhausted from the lift cylinder to lower the arms and returned to the reservoir in the following manner: To lower the lift arms, the touch control lever is moved downward to move the control valve to the rear to uncover the control valve dump port, Figure 4. The weight of the lift arms moves the lift piston for ward, to exhaust the oil in the cylinder past the spring end of the check valve and into the channel leading to the unloading valve plug. An annulus on the plug allows the oil to flow around the control valve bushing to the rear end of the valve. Oil then flows from the rear end of the control valve to the bypass, then into the return line to the reservoir. Raising Position: In the raising position, the touch control lever must be raised to move the control valve forward to direct the oil as follows: With the control valve moved forward in the rais ing position. Figure 5, oil is directed through the pres sure li e Sher down around the inside face of the unloading valve. It then flows do m to the control valve then up through a port to the front of the un loading valve. Since the area at the front face of the large end of the unloading valve is greater than the area at the rear face, the pressure differential moves the unload ing valve rearward to block the oil return "passages: Pressure is then built up in excess of 115 psi to force the check valve off it's seat. Oil then enters the lift cylinder to move the piston to the rear and raise the lift arms. D. Draft Control Draft control is accomplished by placing the selec tor lever in the draft control (downward) position as shown in Figure 1. When the selector lever is in draft control, the position control rod spring is compressed. This places the pivot point of the hand control lever at the draft control swivel, which is held in position by the draft control spring. When the touch control lever, Figure 1, is placed in the raised position, the hand control lever pivots at the draft control swivel moving the control valve forward into the raising position. Raising is stopped when the ram cylinder piston moves out far enough to contact the pin on the hand control lever, moving the control valve into the neutral position. Assume that a field is being plowed at a 6" depth. When the draft load from the implement being used is increased, the main control spring is further com pressed moving the draft control rod forward, which in turn moves the control valve into a raising posi tion. As the implement is raised, compression on the draft control spring is decreased, allowing the control valve to return to a neutral position. E. Implement Position Control Implement position control is accomplished by placing the selector lever in the position control (horizontal) position as shown in Figure 2. In position control, the depth of the implement remains constant Position control is very useful in applications where small increments of adjustment are necessary, such as when raising or lowering the lift links for attaching an implement, or to control working depths of applications such as blades, post hole diggers, etc. Raising the selector lever allows the implement position control spring .o expand, which establishes the ;->> pivot point for the hand control lever at the positiott/y^' , control rod. In effect, this linkage makes the constant:^ draft linkage inoperative. The movement of the against the linkage operates the control valve, hiaiife. taining the position at which the implement will carried. The position of the implement will be deteri. mined by the position of the touch control lever the quadrant. PART FOUR HYDRAULIC SYSTEM Chapter il Adjustments, Component Parts, Trouble Shooting and Special Tools Section 1 Hydraulic Control Adjustment........................................................................................................................................ 2 Leveling Box......................................................................................................................................................................... 3 Lift Cover............................................................................................................................................................................. 4 Lift Cylinder......................................................................................................................................................................... 5 Hydraulic Pump andManifold......................................................................................................................................... 6 Pump Relief Valve and Oil Tubes........................................................................................................................1... 7 Trouble Shooting ............................................................................................................................................................... 8 Specifications............................................................................ 9 Special Tools........................................................................................................................................................................ Page 387 388 389 394 396 408 409 414 414 1. HYDRAULIC CONTROL ADJUSTMENT Before making draft and implement position control adjustments, adjust .the main control spring. To make this adjustment, screw the yoke, Figure 1, clockwise or counterclockwise as much as required to obtain a pre set compression on the main spring. This compression should be tight enough so that you are just able to rotate the spring with fingers and thumb of one hand. AL WAYS make the draft control adjustment first. A. Constant Draft Control Adjustment 1. Attach Lift Arm Positioning Gauge NCA-503-B to the cover as shown in Figure 1. Install the locating pin through the lift arm. 2. Move the selector lever from draft control to po sition control a few times to make sure there is no binding in the linkage. 3. Place the selector lever in draft control position as shown in Figure 1. Pair the touch control lev 'r until it contacts the cam stop. Make certain the lobe on the cam stop is in the maximum forward position (toward the bottom as shown in Figure 1). If the cam stop needs repositioning, be sure the retaining nut is securely tightened after adjustment 5. Loosen the control valve tumbuckle lock nut and adjust the tumbuckle as required until the draft end of Gauge NCA-502, Figure 1, can just be 387 Position 388 Chapter II--Adjustments, Component Parts, Trouble Shooting and Special Tools Figure 3--Adjusting Hydraulic Pump Oil Flow in Vane Type Pumps 3. Check the clearance between the control valve land and the machined surface of the cylinder using the position end of Gauge NCA-502, Fig ure 2. The gauge should be a snug slip fit be tween the control valve and cylinder. Adjust ment is made by holding the lock nut and turn ing the position control rod, as required to get the proper tool fit. After adjusting, recheck with the gauge. Figure 2--Adjusting Control Valve in Implement Position Control inserted between the machined surface of the cylinder and the control valve. After adjustment, tighten the tumbuckle lock nut securely, and recheck with the gauge before attempting the adjustment of implement position control. B. Implement Position Control Adjustment 1. Place the control selector lever in position con trol (parallel with the lift cover). 2. Move the touch control lever to the bottom of the quadrant against the stop. C. Hydraulic Pump Flow Control Adjustment The Flow Control Valve, incorporated only in vane type hydraulic pumps, controls the speed at which implements may be raised. Turning the valve counter clockwise, increases the flow of oil to the lift cylinder and turning the valve clockwise decreases the flow of oil, Figure 3. NOTE: Piston type pumps are not provided with a flow control valve and require no adjustment. The valve may be set at any one of five positions, depending upon the type of implement being used. The slower speeds should be used for plowing and similar work, and the faster speeds are recommended for use with auxiliary equipment such as loaders and remote cylinders. 2. LEVELING BOX The leveling box, located on the top of the right-hand lift link is provided to give ease in attaching implements to the three point hook-up. The leveling box in addition, provides for ease of implement adjustment during field operation. A. Removal 1. Remove the leveling box assembly from the tractor by removing the check chain eyelet which retains the check chain and leveling box assem^ bly to the lower link. Section 2--Leveling Box 389 2. Disassemble the knuckle from the gear box by removing the cotter pin and clevis pin. 3. Turn the crank until the leveling rod fork is separated from the leveling gear shaft 4. Remove the expansion plug at the top of the gear box (drill and use punch if necessary), then drive the pin from the operating crank and withdraw the crank and leveling crank gear. 5. Drive the plug and leveling gear shaft from the gear housing, taking care not to damage the threads. 6. Remove the bearing from the housing with a punch and hammer. 7. Replace the leveling gear shaft and leveling gear if they show signs of wear. 8. Replace all parts that show signs of wear or of being bent. B. Installation 1. Install a new bearing on the leveling gear shaft and push the shaft into operating position in the gear box housing. 2. Position the leveling crank gear into the box, then push the leveling crank through the gear. Install the retaining rivet. Make certain the gears rotate freely before upsetting the rivet in the end of the operating shaft 3. Install the expansion plug in the end of the housing. 4. Screw the leveling gear shaft into the leveling fork. 5. Assemble the leveling box assembly to the trac tor. Secure the knuckle to the leveling gear box with the pin and cotter pin. 6. Install the leveling rod fork and check chain to lower link eyelet and tighten the retaining nut. 3. LIFT COVER The hydraulic lift cover assembly consists of the cover, lift arms, and the control linkage. Always clean all dirt from the lift cover and vicinity before removing it. Even minute particles of dirt enter ing the system will quickly wear the pump and valve mechanisms, resulting in premature failure, or leakage. A. Removal 1. Remove the tractor seat and place the touch control lever in the lowering position. 2. Disconnect the lift arms from the lift links by removing the cotter pins and clevis pins. 3. Remove the cotter pin from the draft control spring yoke and rocker and remove the clevis pin. 4. After the cover attaching bolts are removed,, lift the cover from the center housing and place it in a soft jawed vise with the yoke pointing up ward, and with the ram cylinder and valve mechanism facing outward for easy access while servicing. B. Disassembly 1. Remove the check valve plug from the lift cover. 2. Remove the check valve pilot with "O" ring, spring, pilot and ball from the lift cover. Discard the "O" ring from the check valve pilot. 3. Screw the pilot of Remover and Replacer NCA997 into the check valve seat and remove the seat, using wrenches as shown in Figure 4. 4. Remove the back pressure valve and spring from the lift cover. 5. Remove the accessory plate from the lift cover and discard the "O" rings. Location and part number of the "O" rings are shown in Figure 5. 6. Remove the main control spring from the cover, Figure 6, by turning the yoke counterclockwise to unscrew it from the draft control spring plunger. 7. 3 ?,mo\ "i the main control sprir.j seat, seat: *Uj> port, felt and plate from the Lit cover. 8. Disconnect the control valve linkage. Remove the cap screws that secure the lift cylinder to the lift cover (one of these is recessed in the lift cover) and remove the lift cylinder assembly straight out from the lift cover to avoid damage to the safety valve. Location and part numbers of cylinder to cover "O" rings are shown in the insert, Figure 5. Discard the "O" rings. 390 Chapter II--Adjustments, Component Parts, Trouble Shooting and Special Tools trol spring from the draft control link rod. 15. Remove the cotter pin and washer that retain the selector control link to the selector control arm, then remove the position control assembly and lift control lever shaft from the lift cover. 16. Straighten the lock washer tabs, remove the re taining cap screws and washers and remove the right and left lift arms from the main lift shaft, Figure 7. NOTE: Late models have only one cap screw in each arm. 17. Withdraw the hydraulic lift shaft from the cover. 18. Remove the ram arm and the lift shaft bushings from the lift cover. 19. Remove the draft control link and draft control spring plunger assembly from the lift cover. 20. Remove the pin which secures the selector lever to the selector control arm. Remove the selector NAA-937-E NAA-937-E NCA-937-D Figure 4--Removing Check Valve Seat 9. Remove the ram cylinder piston rod from the ram arm, by removing the cotter pin and retainer pin. 10. Remove the nut and washer that retain the draft control bushing on the draft control link rod. 11. Remove the nut, spring, and washer, then remove the touch control lever. Woodruff key, friction plate and cork disc from the hydraulic lift con trol lever shaft. 12. Remove the cap screws securing the quadrant ^sembly to the liii cov .r, and slide the quadrant sembly frorn lift cc .trol lever shaft. ,1J>. Remove the cotter pin, nut, and washer securing the hand control lever assembly to the lift con trol lever shafts and slide the hand control lever and swivel assembly forward off the draft control bushing. Slide the hand control lever from the lift control lever shaft and remove it from the lift cover. 14. Remove the draft control bushing and draft con Figure 5--Accessory Plate and Cylinder Showing Location of "O" Rings ACCESSORY PLATE PLUG GASKET GASKET Section 3--Lift Cover SPRING "O" RING CHECK VALVE PLUG CHECK VALVE PILOT O" RING CHECK VALVE SEAT BACK PRESSURE VALVE PILOT SPRING 391 "V LIFT CONTROL LEVER SHAFT 'S WASHER S\ QUADRANT ASSEMBLY \ WOODRUFF KEY DRAFT CONTROL SPRING PLUNGER \ FRICTION DISC \ N. NS FRICTION PLATE > WASHER SPRING LEVER STOP CAM STOP RETAINER LEVER PLATE FELT SPRING SEAT SUPPORT WING NUT SPRING SEAT .'AIN CONTROL SPRING YOKE T-2713 Figure 6--Hydraulic Lift Cover--Disassembled control arm detent spring retaining plug, detent spring and detent ball, then remove the selector control arm and "O" ring. 21. Remove the pin retaining the draft control link to the draft control spring plunger. 22. Remove the snap ring securing the swivel to the hand control lever and remove the swiveL 23. Remove the pin securing the selector control link to the position control arm. 24. Remove the pin securing the position control cam to the position control arm. 25. Remove the lock nut retaining the locking plate, position control rod and position control spring to the position control arm and disassemble. 392 Chapter II--Adjustments, Component Parts, Trouble Shooting and Special Tools REAR PLATE GASKET LINK LIFT SHAFT TURNBUCKLE LIFT ARM --| DRAFT CONTROL LINK ASSEMBLY CYLINDER "O" RING UNLOAD IVALVE BUSHING UNLOAD VALVE PLUG DRAFT CONTROL SPRING DRAFT CONTROL BUSHING DRAFT CONTROL SWIVEL SNAP RING HAND CONTROL LEVER SPRING SEAT `--BAFFLE PLATE POSITION CONTROL CAM PLATE POSITION CONTROL SPRING T-2714 Figure 7--Lift Cylinder. Assembly--Disassembled C. Inspection 1. Replace the hydraulic lift cover if cracks are found. Replace the lift shaft if it is worn or if the bearing surfaces are scored. Replace the hydraulic lift shaft bushings if side movement is noticeable or if the inside diameter is excessively worn. 2. Check the control linkage for excessive wear or bends. 3. Replace the draft control bushing and swivel if they are worn. 4. Replace the position control arm if it is worn. 5. Discard any springs that show evidence of rust or corrosion. D. Assembly The lift cover is shown disassembled in Figure 6. The lift cylinder assembly and the linkage and lift shaft assembly are shown disassembled in Figure 7. 1. Install the lift cover in a vise with the check valve hole in a vertical position facing upward. 2. Install the back pressure spring and valve in the lift cover (lubricate the valve before installing). 3. Remove the thrust washer and bearing from Remover and Replacer NCA-997. Install the check valve seat in the lift cover, as shown in Figure 8. 4. Install a new "O" ring on the check valve pilot, and install the check valve ball, pilot spring and check valve pilot with "O" ring in the lift cover, Figure 6. 5. Install the check valve plug in the lift cover and tighten it to 45-55 ft. lbs. torque. 6. Tngfrall a new "O" ring in the recess on the cover and install the selector control arm throug the lift cover and "O" ring, then install the selec-/.. tor lever and retaining pin to the selector < arm. Section 3--Lift Cover 393 Figure 8--Installing Check Valve Seat 7. Attach the draft control swivel, bushing and spring to the draft control link assembly with the fiat washer and lock nut Be sure the nut is pulled up tight against the fiat washer and shoulder on the link rod. Figure 7. 8. Attach the draft control plunger to the draft control lift with the clevis pin and cotter pin. 9. Assemble the position control lift arm assembly. Assemble the spring to the rod, the rod and the spring to the position control arm assembly, and locking plate to the rod with one lock nut. Se cure the position control cam to the position control arm with a clevis pin and cotter pin. 10. Attach the selector control link to the position control arm with the clevis pin and cotter pin. Figure 7. 11. Install the draft control link and draft control spring plunger assembly in the lift cover. 12. Position the ram arm in the lift cover and insert the lift shaft through the ram arm. Install the bushings over each end of the lift shaft and po sition them flush with the housing. 13. Install the lift arms on the lift shaft Secure them in position by installing the washer, lock plate and cap screws on each one. Bend the ends of the plate over the cap screws to lock them in position. Make certain the arms operate freely after assembly. 14. Position the control lever assembly and the control lever shaft into the lift cover, and install the selector control link to the selector control arm. Install the retaining washer and cotter pin, Figure 6. 15. Install the draft control spring and draft control bushing on the draft control link, Figure 7. 16. Install the hand control lever assembly on the lift control lever shaft, then slide the swivel over the draft control bushing on the draft control link. Install the'washer, nut, and cotter pin which retain the hand control lever to the control shaft, then loosely replace the washer and nut which retain the draft control bushing on the draft con trol rod, Figure 7. 17. Position a new gasket on the quadrant assembly and secure the quadrant assembly to the housing with cap screws. Position a new friction disc next to the quadrant, then install the Woodruff key and friction plate. Place the flat washer and spring next to the hub and install the retaining nut. 18. Install the touch control lever to the friction plate with cap screws. 19. Tighten the draft control bushing retaining nut. 20. Install the piston rod and secure it to the ram arm with a clevis pin and cotter pin. Figure 7. 21. Install new "O" rings in the cylinder assembly and install the cylinder assembly in the hydraulic lift cover. Tighten the bolts to 60-80 ft. lbs. torque. Be sure the longest bolt is placed through the machined hole in the lift cover, Figure 6. 22. Install the control valve tumbuckle and secure it with a clevis pin and cotter pin, Figure 7. 23. Install the selector arm detent ball, spri/sg and s ;at in the lift cover. 24. Place the cover support plaie seal, spring seat, and cover plate over the plunger and secure the cover plate to the housing with bolts. Position the main control spring over the spring seat and secure the yoke to the plunger rod by turning it clockwise. NOTE: Apply heavy grease (equivalent to Ford Spec. M-4664) to the plunger prior to assembly. 394 Chapter il--Adjustments, Component Parts, Trouble Shooting and Special Tools 25. Install new "O" rings in the accessory plate. Po sition the accessory plate on the hydraulic lift cover. Position the inch bolt in the center of the accessory plate and tighten it to 12-15 ft. lbs. torque, then install the two remaining bolts and tighten them to 45-65 ft lbs. torque, Figure 6. E. Installation 1. Clean the mating surfaces of the cover and center housing and lay a new gasket in position on the center housing. 2. Set the lift cover into position over the gasket and install the bolts. Tighten all bolts to 45-65 ft lbs. torque. 3. Attach the lift control yoke to the rocker arm with a clevis pin and cotter pin. Connect the lift arms to the leveling rods. 4. Install the tractor seat 4. LIFT CYLINDER The lift cylinder assembly is composed of the ram cylinder piston, and oil valves (except check valve and pump relief valve) and bushings that control operation of the hydraulic system, and the cylinder housing. A. Lift Cylinder Removal 1. With the lift cover mounted in a vise, remove the accessory plate to gain access to one lift cylinder retaining bolt. Discard the accessory plate "O" rings. 2. Remove the tumbuckle assembly from the lift control lever and control valve by removing the cotter pin and clevis pin. Remove the safety valve by turning it counterclockwise. 3. Separate the lift cylinder from the lift cover by removing the cap screws, then install the cylin der assembly in a vise. Discard the "O" rings. B. Disassembly 1. Remove the front baffle plate, gasket and control valve spring from the lift cylinder. 2. Remove the rear plate and gasket from the cyl inder assembly by removing the cap screws. Remove the control valve. 3. Remove the unloading valve plug from the cylin der assembly, using a slide hammer as shown in Figure 9. Remove the unloading valve and dis card the "O" rings. 4. Remove the front and rear unloading valve bush ings with Remover and Replacer, N-508-A, Figure 10. Remove the control valve bushing with Remover and Replacer, N-508-A, Figure 11. If the lift Cylinder is equipped with a special control valve to obtain slower hydraulic action, remove the plug and restrictor from the lift cylinder, Figure 12. Remove the piston from the cylinder by apply ing air pressure through the safety valve hole while holding your finger over the exhaust hole. Figure 9--Removing Unloading Valve Plug Figure 10--Removing Front and Rear Unloading Bushing Section 4--Lift Cylinder 395 Figure 11--Removing Control Valve Bushing CAUTION: Do not use excessive car pressure as the piston may fly out and cause injury or damage. 7. Remove the "O" rings and back-up seal from the piston and discard them. 8. Clean all parts in solvent Blow them dry with air. Inspect for nicks, burrs, scuffing or other signs of wear. Replace any parts found defective. C. Assembly 1. Soak the back-up seal in warm water for 2 minutes to prevent its breaking when stretched, Figure 13--Installing Piston Back-up Seal and "O" Ring then fit it over a piston ring compression tool. Install it on the piston. Figure 13, so that the roughened side of the seal mates with the "O" ring. The back-up seal must be placed toward the open end of the piston. 2. Lubricate the "O" Ring and seal and install the compressing tool over the piston seals. Lubricate the cylinder wall, then install the piston by push ing it into the cylinder as the compressing tool is removed. Cylinders with Modified Control Valve and Bushing -Slow Acting: 3. Install the cylinder flow restricter in the drilled passage which joins the control valve bushing bore to the drilled passage in which the hex head bolt "A" is installed, Figure 12. This is accomplished by removing the Allen head plug at the plate end of the cylinder and pressing the CONTROL VALVE BUSHING 396 Chapter li---Adjustments, Component Parts, Trouble Shooting and Special Tools Figure 15--Installing Front and Rear Unloading Valve Bushings restricter into the passage using a flat end rod or punch. IMPORTANT: Care should be exercised not to distort the orifice opening of the restrictor or press the part in too far to where interfer ence with the threaded portion of the hex head bolt results. 4. Secure the cylinder housing in a vise, then in stall the pilot of Remover and Replacer, N-508-A, in the bushing bore. Install the puller shaft through the pilot and bushing, making certain that the large land of the bushing leads into the bore. Install the washer so that the small diam eter pilots into the end of control valve bush ing, then lubricate the bushing and pull it into the housing, Figure 14. 5. With Remover and Repiacer, N-508-A, install the front and rear unloading valve bushings so that the large notch in the front of the bushing faces toward the open end of the cylinder. Lubri cate the bushing, then pull it into the bore, Fig ure 15, until it is flush with the machined surface at the open end of the cylinder. If pulled through too far, reverse the tool and retract the bushing until it is flush. 6. Install a new "O" ring on the unloading valve. Lubricate the valve and "O" ring and install the valve in the bushing. 7. Install the unloading valve plug, using the same slide hammer tool used in removal, Figure 9. IMPORTANT: The threaded end of the plug must always face toward the front of the cylinder. 8. Position a new gasket on the front baffle plate (closed end of cylinder). Install the control valve spring in the bore, hold the plate against the spring and secure it by installing the retain ing cap screws. 9. Lubricate the control valve and slide it into the bushing. 10. Secure a new gasket and rear plate to the cylin der assembly with bolts and a new special steel washer as shown in Figure 12. Install the copper washer over the safety valve and screw it into position in the lift cylinder. 11. Position the lift cover in a vise. 12. Install all new "O" rings on the top of the lift cylinder. Secure the lift cylinder to the lift cover and tighten the bolts to fi0-80 ft lbs. torque. 5. HYDRAULIC PUMP AND MANIFOLD Two types of hydraulic pumps are used on Ford Tractors, the vane type and the piston type pump. The piston type pump may be equipped with a ball or roller bearing as shown in Figures 17 and 18. Both type pumps are driven by a gear mounted at the rear of the engine camshaft The pump is connected to the tractor hy draulic system by a manifold to supply pressure to raise or lower the tractor lift arms. The vane type pump maximum capacity is 4.7 gr Ions per minute at 1650 engine ipm while the maxim capacity of the piston pump tyPe 4 gallons per at 2000 rpm. A sectional view of each type pump Section 5--Hydraulic Pump and Manifold 397 PROOFMETER DRIVE DRIVE GEAR CAMSHAFT RING ROTOR PUMP VANE INTAKE PORT PRESSURE PLATE FLOW CONTROL ADJUSTMENT F.LOV^^^TROL ,, FLOW CONTROL . SPRING.-, FLOW CONTROL ', PLUNGER "431 Figure 16--Vane Type Hydraulic Pump--Sectional View shown in Figures 16, 17 and 18. The pump and manifold can be removed as an assem bly if desired, however, the pump to manifold attaching bolts should be loosened, before disconnecting the mani fold from the transmission or pump from the engine. A. Removal 1. Thoroughly clean dirt and grime from the pump and manifold prior to removal, as dirt entering the system will quickly wear the control valves and pump. 2. Disconnect the Proof-Meter cable at the p unp. 3. L< osen the pump to engine mounting; bolts o prevent stress on the manifold casting. Then, remove the manifold to pump retaining nuts. On the `Row Crop" or "Industrial" tractors, it will be necessary to remove the right side rail or remove and loosen the side rail retaining bolts as. necessary to rotate the side rail on its axis, in order to gain access to the pump to manifold retaining nuts. Remove the pump to engine bolts and lift off the pump. Discard the gasket and "O" rings and place a clean cloth over the manifold to pump opening to prevent the entry of dirt B. Disassembly Refer to the procedure pertaining to the specific hydraulic pump that is being disassembled. Vane Type--Model 600, 700, 800, and 900 Tractors: 1. Clamp the pump in a vise equipped with soft jaws. Remove the two Allen head bolts and remove the flow control valve body, Figure 19. Discard the two "O" rings. Remove the ProofMeter, bushing, gasket, and adapter from the housing. 2. Remove the bolt, lock washer and flat washer from the end of the drive gear shaft Remove the two long bolts from the cover assembly and carefully separate the drive gear and drive gear housing from the pump body, leaving the pump shaft in the pump. 3. Remove the key and spacer from the shaft. 4. Remove the short bolts and remove the pump cover from the pump body. Discard the "O" rings. 5. Remove the cam ring from the pump body and discard the "O" ring. 6. Remove the rotor and vane assembly from the pump body. 7. Remove the vanes from the rotor. 8. Press the shaft and bearing assembly out of the pump body toward the rear. Remove the bearing from the shaft 9. Remove the two dowels, pressure plate, "O" ring, and spring assembly from the pump body by tapping lightly against the inner surface below the oil seal. 10. Remove the "O" ring and spring from the pres sure plate and discard the "O" ring. 11. Remove the oil seal from the pump body using Bearing Puller 956-2 and Slide Hammer 943-S, Figure 20. 12. Place the flow control valve body in a vise equip ped with soft jaws. 13. Remove the plug from the end of the valve body, then remove the "O" ring, spring, and flow con trol valve plunger. Discard the "O" ring. 14. Drive the flow control adjusting valve retaining pin from the valve body. 398 Chapter H--Adjustments, Component Parts, Trouble Shooting and Special Tools v^jvls Returning WOBBLE PLATE r VALVE / P1PN COVER ft PLATE / f PUMP BODY PUMP OUTLET INLET VALVE DRIVE SHAFT ;% INLET VALVE SEAT , WOBBLE PLATE "SpuMP INLET... , Figure 17--Ball Bearing Piston Type Hydraulic Pump- Sectional View ' 'DRIVEN GEAR ,'-3?i"5^' v,.' . T-2720 15. Remove the flow control knob, spring; and shaft as a unit and discard the "O" rings. 16. If it is necessary to replace the flow control knob, drive out the pin securing the knob to the shaft Vane Type--NAA: 1. Clamp the pump in a vise equipped with brass jaws. 2. Remove the Proof-Meter bushing, gasket and adapter from the mounting housing. 3. Remove the bolt lock washer and flat washer that secures the gear to the end of the shaft Figure 21. 4. Remove the two bolts that attach the mounting housing to the body. Separate the mounting housing and gear from the body with a soft hammer. 5. Remove the snap ring that secures the shaft in the body. Figure 21. 6. Pull the outer bearing and shaft from the body as an assembly. 7. Remove the four bolts and lock washers that attach the manifold to the body and cover. Sep arate the manifold from the body and cover. 8. Remove the four bolts that attach the cover to to the body. Carefully separate the cover from the body. 9. Slip the cam ring, pressure plate and rotor assem bly from the dowels in the body. Figure 21. . 10. Working from the cover side of the body, care fully drive the seal and inner bearing from the body with a punch. 11. Remove the rotor from the cam ring. NOTE: Do not lose any of the vanes from th rotor 12. Remove the flow control valve, plug, "O* ring; spring, and plunger from the cover, Figure 21. < ^ .*> Ball Bearing Piston Type Pump: 1. Remove the Proof-Meter Adapter Assembly. 2. Remove the bolts, lock washer and flat that attaches the gear to the end of the Figure 22. VALVE PLATE COVER Section 5--Hydraulic Pump and Manifold PISTON WOBBLE PLATE HOUSING 399 DRIVEN GEAR PROOF-METER DRIVE DRIVE SHAFT NEEDLE BEARING SEAL TAPERED ROLLER BEARING ROLLER BEARING Figure 18--Tapered Roller Bearing Piston Type Hydraulic Pump--Sectional View T-2726 3. Remove the four bolts, that attach the housing to the body. With the pump in a horizontal posi tion on the bench, separate the housing and shaft from the body. Lift the plate and bearing from the end of the shaft. 4. Drive the shaft and bearing from the housing with a long 3/16" pin punch. Separate the gear from the housing. 5. Lift the six pistons and springs from the pump body. 6. Remove the six bolts that attach the cover to the body. Place the body on the bench in a -ertical position, then, lift off the cover. Lift the sLv balls from the body. Remove the six springs from the plate. 7. Place the cover on the. bench with the plate facing upward. Remove the plate attaching screw from the plate. Carefully work the plate out of the cover with two small punches. Remove six balls and springs from the cover. 8. If the shaft bearing is defective, remove it with a bearing puller as shown in Figure 23. 9. Remove the seal from the housing by using a long drift punch and driving against the seal through the Proof-Meter drive hole. 10. Remove the intake valve seats from the body with Valve Seat Remover, NCA-600-G as shown in Figure 24. Tapered Roller Bearing Pision Type Pump: 1. Follow steps 1 through 7 trader the disassembly procedure for the ball bearing pump. The tapered roller bearing pump is shown in Fig ure 25. 2. If the shaft bearing is defective, remove it with a bearing puller as shown in Figure 26. 3. Place the housing in a vise, as shown in Figure 27, and drive the seal down far enough to allow the jaws of Bearing Puller FT-943 to be placed under the bearing cup at "A", in Figure 28. 4. Connect Push Puller FT-938 to Bearing Puller FT-943 as shown in Figure 27 and remove the cup. 400 Chapter II--Adjustments, Component Parts, Trouble Shooting and Special Tools GEAR SPACER BEARING SHAFT PLUG "O" RING FLOW CONTROL VALVE PLUNGER SPRING FLOW CONTROL VALVE PLUNGER Figure 19--Vane Type Pump Disassembled--Model 600,700,800, and 90Q Tractors T-272! 5. Remove the seal and needle bearing together by inserting the jaws of Pilot Bearing Remover 7600-E, Figure 29, through the seal and bearing to pull at "D", Figure 28. 6. Remove the intake valve seats from the body with Valve Seat Remover NCA-600-G, as shown in Figure 24. Inspection fane Type Pumps: 1. After a pump has been disassembled, discard the old "O" rings, gaskets, and oil seal. Clean all parts thoroughly. . /V 2 Inspect the cam ring Figure 21, for signs of wear. ? .... ________t. Section 5--Hydraulic Pump and Manifold 401 Figure 20--Removing Pump Shaft Oil Seal with your finger, discard the rotor, cam ring and vanes and install a new kit. 3. Examine the pump rotor vane for wear by pull ing the vane out to its normal operating position and moving it back and forth. If movement can be felt, discard the vanes, rotor and cam and in stall a new kit Check the inside of the cam ring for having a sharp feather edge. Although the ring may be smooth, a feather edge indicates excessive wear and the assembly should be replaced. 4. Examine the shaft seal area. If roughness is evident, replace the assembly. 5. If the bearings run rough or if side movement is evident, replace them. 6. Check the flow control valve to see if it is free in the bore after assembly. 7. If the shaft bushing in the cover shows signs of damage, it should be replaced. All parts should be lubricated and the pump filled with oil imme diately after repair. Piston Type Pump: 1. After a pump has been disassembled, discard all old "O" rings, gaskets and oil seal. Clean all parts thoroughly. 2. Check all springs for distortion or breaks and replace them as required. 3. Inspect the body inlet valve seats for burrs, wear or out of round condition. Replace defective valve seats as required. Replace the body if any of the piston bores are scored or damaged. 4. Inspect the inlet and outlet valve balls for wear or scores. Replace as required. 5. Inspect the plate for damaged outlet valve seats or damaged or worn valve stop pins. Replace the plate if the seats are worn. Replace worn or damaged pins. 6. Examine each piston for galling or scores and replace as required. If scores are noted, the trac- BODY INNER BEARING SHAFT SEAL OUTER BEARING GEAR KEY "O" RING DOWEL CAM RING VANE FLOW CONTROL o rinGn. valve. COVER GASKET MANIFOLD SNAP RING Figure 21--Vane Type Pump NAA--Disassembled T-2727 402 Chapter II--Adjustments, Component Parts, Trouble Shooting and Special Tools GASKET JBrf PROOF-METER BUSHING' ADAPTER' . PLAIN WASHER LOCK WASHER' SHAFT p "O'* RING seat f: J; SPRING -3',. '. . .. . - .& TV V ' .--3 ^GASKET^ - v *-*,>' ' X' i^.-V . -i" $.-j? ; rtA -i; .:-.i 'SS' >.'"-** - GASKET s' v: ' "" i- X -l '-< *'- ' ''* -y!-> . . 3'. ;3 "O" RING Figure 22--Ball Bearing Piston Type Pump--DisassemL/hd tor hydraulic system should be thoroughly flushed before the pump is installed on the engine. 7. Check the shaft seal area and bearing surface for wear or damage. Replace the shaft if either of these conditions are evident. 8. Inspect the plate and the bearing for wear or damage. Replace these parts as required. 9. Inspect the shaft roller bearing and cup or t double row ball bearing for roughness, wear ? damage. Replace these parts as q Assembly Vane Type Pump--Model 600, 700, 800 and 900 Tractors: 1. Place the pump body in a vise equipped: brass jaws. Section 5--Hydraulic Pump and Manifold 403 Figure 23--Removing Shaft Bearing 2. Install the oil seal in the body with a driver and Step-Plate 630-5, Figure 30. Make certain that the small vent holes in the seal are toward the rear of the pump. 3. Press the rear of the shaft into the bearing. Dip the bearing into clean hydraulic oil. 4. Position the spring and "O" ring, Figure 19, on the pressure plate and install the pressure plate in the pump body. NOTE: If the two dowel pins were removed from the pump body, they must be installed before installation of the pressure plate. 5. Install the rotor in the cam ring. Install the twelve vanes in the rotor, making certain that the rounded surface of each vane, is toward t'ie outside of the rotor. 6. Position a new "O" ring on the pump body. In stall the cam ring on the body. IMPORTANT: The cam ring must be installed with the arrow pointing upward and be visible when the pump is mounted on the engine. 7. Lubricate the rotor vanes and cam ring with clean hydraulic oil. Figure 24--Removing Inlet Valve Seats from Body 8. Press the shaft bushing into the pump cover if it was removed. Place a new "O" ring on the pump cover. Secure the cover to the body with two short bolts. 9. Install the key in the end of the shaft and slip the spacer in place in the shaft 10. Position a new gasket on the pump body. Place the gear in the housing with the Sat side of the gear toward the housing mounting Sange. Install the housing on the body making sure that the shaft key is in alignment with the keyway in the gear. Secure the housing to the body with the two long bolts. Tighten the bolts evenly and alternately. 11. Secure the gear to the shaft with a Satwasher, L'ick washer :nd bolt, Figure 19. 12. Install the Proof-Meter adapter, new gasket and Proof-Meter bushing in the homing. 13. Install a new "O" ring on the control valve plug. Install the plunger, spring and plug in the flow control valve body. 14. Install two new "O" rings on the flow control lever and shaft. Install the assembly in the flow control valve body and secure with a roll pin. 404 Chapter il--Adjustments, Component Parts, Trouble Shooting and Special Tools BEARING SHAFT PROOF-METER BUSHING BALL SPRING PIN .MANIFOLD Figure 25--Roller Bearing Piston Type Pump-- Disassembled T-2729 15. Position two new "O" rings on the flow control valve body. Secure the flow control valve body to the pump body with the two Allen head screws. Vane Type Pump--NAA: 1. Install the inner bearing, Figure 21, in the pump body. 2. Install the csal in the body with a step plate. Figure 30, that contacts the outside diameter of the seal. Make certain that the vent holes in the seal are facing out. 3. Insert the dowel pins in the cam ring if they were removed. Position the pressure plate on the dowels. 4. Position the rotor in the cam ring and install the twelve vanes in the rotor with the rounded edge toward the cam ring, Figure 21. 5. Place a new "O" ring on the pump body and oh the cover, Figure 21. Place the cam ring and rotor assembly on the body with the arrow at the side of the cam ring pointing to the left or counterclockwise dtaction as viewed from the shaft end of putr.p. 6. Secure the cover and new "O" ring to the body with the four attaching bolts. , 7. Press the outer bearing on the shaft if it was *, removed.- Install the shaft spacer, and bearing io the body and secure with the snap ring, 8. Install the plunger and spring in die cover, ure 21. Install a new "O" ring on the plug. " the plug and flow control valve in the 9. Place the key in the end of the shaft Section 5--Hydraulic Pump and Manifold Pulling Attachment 951 405 housing and gear on the shaft and body. Secure the body to the housing with two cap screws. Secure the gear to the shaft with a fiat washer, lock washer, and bolt. 10. Install the Proof-Meter adapter, new gasket, and the bushing in the housing. Figure 28--Bearing Cup, Seal and Needle Bearing Installation 11. Secure the manifold and two new gaskets to the body and cover with four bolts. Ball Bearing Piston Type Pump: 1. If the inlet valve seats in the pump body were 406 Chapter 11--Adjustments, Component Parts, Trouble Shooting and Special Tools Figure 30--Installing Seal in Body removed, install them with Replacer NCA-600EA, as shown in Figure 31. 2. Press the bearing onto shaft until it bottoms on the shoulder. IMPORTANT: Use an adapter that contacts only the hearing inner race. 3. Install the seal in the housing with Step Plate 630-11, Figure 32. 4. Coat the bearing and the pump shaft seal surface with a light film of oil. Assemble the shaft and bearing assembly and the gear into the housing. Use a brass drift and tap against the bearing outer race to position the shaft and bearing as sembly in the housing. Be sure to align the shaft splines with the gear splines. 5. Install the drive gear to drive shaft lock washer and retaining bolt. 6. Place. the cover in a vise with the valve face upward. Install the gasket in the cover. NOTE: Alignment marks on the plate and gasket must he positioned at the bolt hole near the manifold outlet, as shown in Fig ure 33. 7. Assemble the outlet valve return springs and outlet valve balls in the cover. Position the valve plate over the outlet valve balls and install Section 5--Hydraulic Pump and Manifold 407 the center bolt loosely. Use two cap screws as shown in Figure 33, to hold the plate in align ment while tightening the plate attaching bolt. 8. Position the small end of the inlet valve springs on the stop pins in the plate. Remove the cover from the vise. 9. Position the six inlet valve balls in the pump body. 10. Carefully position the cover on the body as shown in Figure 34. Check the alignment of all springs, then secure the cover with the six attach ing bolts. Tighten the bolts evenly and alter nately to 40-50 ft. lbs. torque. 11. Invert the pumn and irstaDthe six piston return springs in the body. Coat the pistons whh oil, then install them in the bores with the crowned ends facing up, Figure 35. 12. Position a new "O" ring in the pump body groove. Place the .bearing and wobble plate on the shaft. Install the housing and shaft assembly on the body, while holding the wobble plate as shown in Figure 35. 13. Press down on the housing and install the four attaching bolts. Tighten the bolts to 40-50 ft. lbs. torque. 14. Install the Proof-Meter assembly. Tapered Roller Bearing Piston Type Pump: 1. Press the tapered bearing onto the shaft until it bottoms on the shoulder. IMPORTANT: Use an adapter that contacts only the bearing inner race. A piece of pipe 1*4" in diameter and 4^" long can be used as an adapter. 2. Install the needle bearing i.i the gear housing with a socket large enough so that the IX). seats on the outside top edge of the bearing. Drive the bearing in until the top of the bearing is flush with the step in the housing, then use a slightly smaller socket and drive the bearing until it is flush with the bottom of the chamber in the bore, as shown at "C" in Figure 28. 3. Install the seal in the housing with a step plate 408 Chapter I!--Adjustments, Component Parts, Trouble Shooting and Special Tools from Set 630-S that contacts the outer circum ference of the seal. The seal should be positioned Vic" below the bottom of the bearing cup seat, as shown at "B" in Figure 28. It is important that the Ym" measurement not be exceeded as the seal could be crushed and its effectiveness destroyed. 4. Install the bearing cup in the housing with a step plate that contacts only the outer diameter of the cup. Make certain that the cup bottoms in the housing. 5. If the inlet valve seats were removed from the pump body, install them with Replacer NCA600-EA, as shown in Figure 31. 6. Assemble the shaft and bearing assembly and the gear into the housing. Secure the gear to the shaft with a flat washer, lock washer, and bolt. 7. Follow steps 6 through 14 as detailed under Ball Bearing Piston Type Pump to complete the assembly procedure. 6. PUMP RELIEF VALVE AND OIL TUBES The hydraulic system intake and pressure tubes ex tend through the transmission to connect the hydraulic manifold at the front of the transmission to the hydrau lic sump in the center housing. The tubes are pressed into the transmission and have "O" rings in the counter bores at each end of the transmission to provide a leakproof seal. The pump relief valve is located in the bottom of the center housing. The relief valve can be removed and installed without separating the center housing from the transmission. A. Pump Relief Valve 1. Drain the hydraulic oil from the hydraulic sys tem. 2. Remove,the relief valve retaining plate, "O" ring and gasket. 3. Place a flat washer over the V4 inch Unified National Course bolt and thread it into the relief valve. 4. Position a small block of wood on the housing and pry the valve out of the bore as shown in Figure 36. NOTE: If the relief valve can not be removed in this manner, it will be necessary to remove the lift cover and drive the valve out of the housing using a punch and hammer. 5. Discard the "O" rings from the relief valve and remove the bolt. 6. Before installing a new relief valve, thoroughly clean around the bore and access plate mounting ^ area. 7. Install new "O" rings on the relief valve lubricate the valve surface and "O" ring wlf hydraulic oil. 8. Push the relief valve into the bore. Section 7--Trouble Shooting 409 Figure 36-Removing Pump Relief Valve 9. Install a new gasket on the retainer plate and install the plate. Install the lock washers and nuts and tighten the nuts securely. B. Hydraulic Tubes 1. Remove the transmission from the tractor. 2. Install Replacer NCA-945A in the pressure tube at the rear of the transmission, as shown in Fig ure 37 and drive the tube out of the transmission. 3. Use the same tool and drive a new tube in from the front of the transmission until it is properly positioned in the housing (tube should not pro trude beyond face of housing). 4. Use Replacer NCA-945-B and drive the intake tube out from the rear of the transmission. Use the same tool and install a new tube through the front of the transmission as shown in Figure 38. Figure 37-Removing Pressure Tube Figure 38--Installing Intake Tube 7. TROUBLE S380GT3NS Trouble in the hydraulic system can usually be traced to one of several causes by first determining what the end results or symptoms are.'By observing the operation of the system, you will be able to determine which of the conditions listed below prevails. Detailed instructions for locating the cause of the troubles are given under headings which are actually the conditions listed. The procedure for locating and cor recting troubles is to consider the most likely cause first. Then, as possibilities are eliminated, the more serious causes are explored in the order in which they are likely to occur. In each case, the corrective action required is indicated. In every case of hydraulic system trouble, certain preliminary steps should be taken before any attempt is made to correct the problem. It should be definitely 410 Chapter II--Adjustments, Component Parts, Trouble Shooting and Special Tools determined that malfunction or complaints are not caused by exterior factors such as the following: 1. Method of Implement Attachment or Implement Adjustment. 2. Type of Soil Being Worked. 3. Terrain or Contour of Ground Being Traversed. After all exterior factors have been eliminated as possible causes of the trouble, proceed with the most evident of the four following conditions. A. Failure to Lift A road map outlining the procedure for checking for, and correcting the difficulty, "failure to lift," is shown in Figure 39. I FAILURE TO~UFT| ( M--CHECK HYDRAULIC OIL LEVEL |OIL LEVEL LOW] IOIL LEVEL O.ICl FILL SYSTEM TO PROPER LEVEL TROUBLE OVER CHECK SELECTOR LEVER ADJUSTMENT ADJUSTMENT O.K. OUT OF ADJUSTMENT I M--CHECK PUMP PRIME ADJUST AS NECESSARY TROUBLE OVER | PRIME O.K. (PRIME NOT 6Z1 PRESSURE NOT O.K. ( b*--CHECK PUMP (PRIME PUMP OUTPUT PRESSURE TROUBLE OVER PRESSURE O K. i M--CORRECT FLOW CONTROL VALVE TROUBLE -OVER I CHECK CONTROL AND UNLOADING VALVE FIT |FIT O.K.I < -- FREE UP CONTROL LEVER UNKAGE FIT NOT O.K. CORRECT VALVES AS NECESSARY TROUBLE OVER TROUBLE OVER 528 Figure 39--Failure to Lift--Road Map After you familiarize yourself with the procedure, a glance at the road map will be all that is needed to trouble shoot this symptom. 1. Check the oil level in the system; if the oil level is low, fill the system to the proper level and check the operation of the system. 2. If the system fails to lift with the selector lever in constant draft when the touch control lever is in the raised position, place the control lever in the raised position and check for lift. If the sys tem fails to lift in constant draft only, remove the P.T.O. shifter plate from the left side of the housing. Position the touch control lever against the stop at the top of the quadrant. Place the selector lever in constant draft position. Using the constant draft end of Gauge, N-502, check the distance between the control valve land and the valve housing. If adjustment is required, loosen the lock nut in the tumbuckle and adjust for a snug fit of the gauge. Tighten the lock nut, replace the P.T.O. shifter cover, start the engine and check the function of the lift. If the adjust ment is satisfactory and no adjustment is needed, proceed with paragraph 3. 3. To separate pump malfunction from hydraulic lift cover malfunction, it will speed up the check ing procedure if a substitute pump of known char acteristics is used. If such a pump is not avail able, the following procedure should be used. Roller Vane Pump: Remove the pipe plug from the lower right front side of the center housing. Place a container under the opening. Place the touch control lever down and start the engine. If oil is delivered from the pipe plug hole, the pump is primed and you can proceed with paragraph 4. If oil is not delivered from the hole, race the engine or apply air pressure to the center housing through the hydraulic dip stick hole until the pump is primed. Stop the engine and install a pressure gauge in the pipe plug hole. Start the engine and check for lift at the lift arms and for pressure at the gauge with, a suitable implement attached to the Sft arms. 15 ijassure c .os not register satisfactorily, proceed * nth pexagmph 4. Piston Pump: Remove the Allen plug in the pump cover. Use the tractor starter to turn the engine over and check for oil delivery. If oil is delivered, replace the Allen plug before the oil stops flowing to preven^t any air from entering the pump. If oil flows from the. pump cover Allen plug hole, the pump is primed. ' 4. Check the pump prime for the respective pump, as follows: Section 7--Trouble Shooting 411 Roller Vane Pump: Remove the flow control valve spring retainer plug from the front end of the pump flow control valve body. NOTE: JJse caution when removing the plug as it is spring loaded. Remove the spring and flow control valve. Clean the valve thoroughly and inspect for burrs or any evidence of hanging up or galling. If damage is evident, polish the valve with Arkansas stone or crocus cloth to remove the burrs or metal build-up. Install the valve in the flow control valve housing and be sure it moves freely in the bore. Inspect the re taining plug "O" ring seal -for damage before replac ing the spring and retaining plug. Start the engine. Place the touch control lever in the raised position and check for lift. If the lift arms do not work, remove the lift cover assembly. Remove the accessory plate from the lift cover and install the portion shown at "A", Figure 40, on the center housing over the pres sure tube. Start the engine and observe the flow of oil into the reservoir. Move the flow control valve'from high to low position with the engine operating at 1800 rpm, and observe the change in the oil flow to determine whether or not the valve is hanging up. Shut off the engine. Remove the accessory plate and install Gas ket, Part No. NCA-502-A; turn the accessory plate 180 and install the portion indicated at "B", Figure 40, on the center housing, blocking off the pressure tube. Start the engine and run it at 600 rpm. This will determine whether or not the pump output is suffi cient to actuate the relief valve which should be set at 2000 psi. If the relief valve operates properly, pro ceed with paragraph 5. If the pump does not have sufficient pressure, re place the pump or repair it as necessary. Piston Pump: To check the pump for output pressure, start the tractor engine. Place the touch control lever in the raised position and check for lift If the lift arms do not function, check for pump output pressure by the following method: Stop the tractor engine and remove the pipe plug from the lower right front side of the center housing. Install a pressure gauge in the pipe plug hole. Remove the lift cover assembly from the tractor. Remove the Accessory Plate, Part No. NCA-475-E, from the lift cover and install the portion shown at "A", Figure 40, on the center housing and over the pressure tube. RAPID CORRECTION DURING OPERATION OR IN LIFT POSITION < M--CHECK VALVING FOR INTERNAL LEAKAGE VALVES OX < M-CHECK LINKAGE CONDITION AND ADJUSTMENT VALVES NOT OX CORRECT VALVES AS NECESSARY TROUBLE OVER LINKAGE IUNKAGE OXl NOT OX I M-CHECK COVER AND CYLINDER I h*--REPAIR LINKAGE OR MATING SURFACES MAKE ADJUSTMENT TROUBLE OVER L IsURFACn ok} jSUW^CES (not OX I M--INSTALL NEW "O" RINGS AND INSTALL COVER -REPLACE OR REPAIR COVER, CYLINDER OR "O" RINGS AS NECESSARY TROUBLE OVER TROUBLE OVER 5210 Figure 41--Rapid Corrections During Operation or in Lift Position--Road Map 412 Chapter II--Adjustments, Component Parts, Trouble Shooting and Special Tools Start the engine and observe the flow of oil into the reservoir. Note that the flow will increase with an increase in engine rpm. Shut the engine off, remove the accessory plate and install an "O" ring at pressure tube location, turn the accessory plate 180 and in stall the portion indicated at "B", Figure 40, on the center housing, blocking off the pressure tube. Start the engine and run at 600 rpm. This will determine if the pump output pressure is sufficient to actuate the relief valve which should be set at 2000 psi. If the pump will actuate the relief valve, the pump output pressure is satisfactory. 5. Check the control valve to bushing fit for inter ference which would not allow the control valve to go into the lift position. Correct the valve action if necessary. Check the unloading valve and the "O" ring for proper functioning. Correct if necessary. If the valves operate properly, the difficulty is in the control lever linkage. Free up the linkage as necessary to insure free movement. B. Rapid Corrections During Operation or in Lift Position The Road Map for checking for, and correcting the condition of rapid corrections as shown in Figure 41. This condition is usually caused by some form of internal leakage. The procedure for correcting the difficulty is as follows: 1. Remove the lift cover from the tractor. Remove the check valve ball and examine the surface for erosion marks. Check the condition of the gasket and the washer under the bolt. Check the control valve surfaces for erosion and scratches and be sure the valve fits the bushing properly. Examine the plug for leakage, then remove the plug and check the press fit to see if there is a good seal ing surface on both the plug and the cylinder. 2. Remove and inspect the unloading valve and also inspect the "O" ring. Replace or repair parts as necessary to correct any valve leakage. 3. Inspect the linkage to be sure there is no bind. 4. The "O" rings between the lift cylinder and the lift cover should be checked for damage. Check the ball seal and the "O" ring for damage. When the lift cylinder is removed from the lift cover, check the cover mating surfaces for cracks. 5. Check the "O" ring .and leather backing washer on the piston and check the cylinder bore for scoring. Reassemble the lift cover, using new "O" rings, and make the proper adjustment using Figure 42--Loss of Pump Prime or Noisy Pump Operation--Road Map Gauge N-502. Install the lift cover on the tractor and check for leakage. Leak-down, to the point of a correction, should not occur more than ten times a minute. C. Loss of Pump Prime or Noisy Pump Operation The road map for checking for, and correcting the symptom, Loss of Prime or Noisy Pump Operation, is shown in Figure 42. If the preliminary inspection does not reveal the difficulty, the trouble is probably due to air in the system. Use the following procedure to find the source of air leakage. 1. Remove the pump and manifold from the tractor. 2. Disassemble the pump and inspect the "O" rings. Inspect all the pump castings for cracks, porosity or any other defects that might cause lealcsg^.; L'.isp;' :t the manifold "O" rings for defect's swsb the n. inifold castings for defects or porosity. no place parts as necessary to repair pump and'' manifold condition. 3. Reassemble the pump and install the pump and manifold on the tractor. Use all new "O" rings. Fill the hydraulic reservoir. 4. Operate the lift arms several times and then allow the tractor to stand overnight to determine if loss of prime still exists. Section 7--Trouble Shooting 413 TROUBLE TROUBLE OVEROVER5212 Figure 43--Erratic Action or Over Correction--Road Map 5. If loss of prime is still prevalent, remove the transmission from the tractor and remove the hydraulic intake tube from the transmission. In spect the tube for possible leakage and observe the press fit into the transmission housing. Re place the tube in the housing and install the transmission in the tractor. Inspect all points of possible leakage and use all new "O" rings and seals. D. Erratic Action or Over Correction The symptom, Erratic Action or Over Correction, is usually caused by an inoperative control valve or binding in the control valve linkage. A road map to follow in trouble shooting this symptom is shown in Figure 43. 1. Remove the lift cover from the tractor. 2. Check for fs-eo vx .cement of the control valve. Check the ozaft coa -ol link assembly for score marks where the draft control bushing may be hanging up. Check the draft control spring plunger for free movement on the guide pin installed in the plate. 3. Make any corrections necessary and install the lift cover assembly. Check to be sure the yoke moves freely in the rocker before installing the pin. E. Loss of Pump Prime or Erratic Lift Operation--Piston Pump A road map outlining the procedure for checking and correcting, "Loss of Prime or Erratic Lift Opera tion," is shown in Figure 44. If the preliminary inspec tion does not reveal the difficulty, the trouble is probably due to air in the system. Before try ing to locate a source of air leak, attempt to bleed air from the system by removing the prime plug in the piston pump cover. Turn the engine over with the starter and permit oil to escape momentarily. When it appears that all air bubbles have escaped, install the prime plug before oil stops flowing. If operation is not improved after the above procedure, drain the hydraulic oil and remove the pump and manifold from the tractor. Disassemble the pump and inspect the shaft seal and the body to gear housing "O" ring. Inspect the piston springs and pistons for breakage or seizure. Check the inlet and outlet valve springs, balls, stop pins and seats. Inspect all the pump castings for cracks, or any other defects that might cause leakage. Inspect the manifold "O" rings and the manifold casting for de fects. Replace parts as necessary to repair the pump and manifold. Reassemble the pump and install the TROUBLE OVER Figure 44--Loss of Prime or Erratic Lift OperationRoad Map 414 Chapter II--Adjustments, Component Parts, Trouble Shooting and Special Tools pump and manifold on the tractor. Use all new "O" rings. Fill the hydraulic reservoir. Operate the lift arms several times, then allow the tractor to stand overnight to determine if loss of prime still exists. If loss of prime is still prevalent, remove the transmis sion from the tractor and remove the Hydraulic In take Tube, Part No. NDA-941-C. Inspect the tube for possible leakage and observe the press fit into the transmission housing. Replace the tube in the housing and install the transmission in the tractor. Inspect all points of possible leakage and use all new "O" rings and seals. 8. SPECIFICATIONS Hydraulic System Capacity............................................................8 U. S. Quarts Type........................................................................Live Action Maximum Pressure...........................................2000 lbs. psi Control....................Implement position or constant draft Vane Type Pump-- Model 600, 700, 800 and 900 Drive ..................................................................................Gear Capacity.... 4 to 4.8 gpm at 0 psi at 2000 rpm (engine) Vane Type Pump--NAA Drive .................................................................................Gear Capacity (Hy-Trol in "Fast" position)____4.8 gpm at 0 psi at 2000 rpm (engine) Capacity (Hy-Trol in "Slow" position) .... 1.25 gpm at 100 psi at 2000 rpm (engine) Piston Pump Drive ................................................................................. Gear Capacity................4 gpm at 0 psi at 2000 rpm (engine) 9. SPECIAL TOOLS The following special tools are required to service the hydraulic system: Tool No. Description NCA-503-B.............................Lift Arm Positioning Gauge NCA-997 ......................................... Hi.nover and Replacer N-508-A............................................Rei.iover and Replacer 943-S...................................................................Slide Hammer 956-2 ........................................................................Puller Jaws 951................................. .Bearing Pulling Attachment 1002 ...................................................................................Puller 625-A........................................................Shaft Protector Set Tool No. Description NCA-600-G........................................Valve Seat Remover 943 ..........................................Bearing Pulling Attachment 943-10 ...........................................................................Adapter 930-D..........................................................Push Puller Legs 938 ........................................................................Push Puller P-61...............................................................Ratchet Wrench 7600-E........................................................................ Remover 630-S.................................................................Step Plate Set NCA-699-EA .............................................................Replacer Part FIVE MAINTENANCE AND LUBRICATION Section 1 Maintenance............................................................................................................................................................................. 2 Lubrication............................................................................................................................................................................... Page 415 415 1. MAINTENANCE MAINTENANCE GUIDE Check for Oil Leaks Fuel Filter (Drain) Diesel Fuel Filter (Replace) Diesel Fuel Injectors (Clean and Test) Check Coolant Level Check Fan Belt and Power Steering Belt Adjustment Check and Adjust Brakes Check Tire Pressure Check Electrolyte Level in Battery Check Clutch Pedal Free Travel Adjust Transmission Bands (Select-O-Speed) Check Headlamps and Taillamp Operation Tighten all Electrical Connections Perform Minor Tune-Up Perform Major Tune-Up Replace Select-O-Speed Transmission Filter Check for Correct Wheel Bearing Adjustment Check Wheel Lug Nuts for Tightness Check Gauges for Proper Operation Every 1200 Hours Each 10 hrs. Each 100 hrs. X X X X X Each 200 hrs. X X X X * X X X Each 400 hrs. X Each 600 hrs. X X X X X 2. LUBRICATION It is extremely important that all moving parts are lubricated at the proper interval with the correct lubricant The following guide describes in hourly intervals, all of the lubrication services which a Ford Tractor should receive. The lubrication chart for "General Purpose" tractors is shown in Figure 1. A similar chart showing lubrication points for "Row Crop" tractors is provided in Figure 2. Figure 3 illustrates the lubrication points for the "Industrial" tractor. A. Service Daily or Every 10 Hours 1. Crankcase Ventilating System: Remove the ele ment ' -'im the Rocker Arm Cover breather and c." m it ' rith solvent. Coat the element lightly v/. Ji engii. : oil before replacing it. 2. Oil Filler Breather Cap: Remove the element from the cap, clean the entire assembly with solvent, coat the element lightly with engine oil and replace it. 3. Air Cleaner: Wash the air intake screen with solvent and clean the oil cup. Fill the cup or tray to the oil level mark with engine crankcase oil. Both the air cleaner and the pre-cleaner (diesel only) should be inspected frequently when first operating under dusty conditions to determine the correct servicing interval. Under severe dusty conditions, service the cleaner at least twice daily. 4. Pressure Gun Fittings: Clean the fittings on the Lift Rod Leveling Box and Lock, the Front Axle Spindles ("General Purpose" and "Industrial"), the Clutch Pedal and the Steering Drag Links. Any dirt left on the fittings may be forced into the bearings and cause unnecessary wear. Apply pressure gun grease to all the fittings and wipe the fittings clean. 5. Crankcase Dipstick: Remove the dipstick from the right side of the engine crankcase. Always wipe the dipstick with a clean cloth. Replace it, then remove it to determine the engine oil level. Maintain the level at the full mark with the recommended lubricant (See Service Every 100 Hours). 415 416 Maintenance and Lubrication Section 2--Lubrication 417 6. Hydraulic System Dipstick: Check the level of the oil on the dipstick and maintain it at the full mark with the recommended lubricant (See Service Every 600 Hours). When checking the hydraulic oil level, always be sure that all hy draulic cylinders are fully extended. B. Service Every 100 Hours 1. Distributor: Apply a few drops of seasonal en gine oil to the oil cup (gasoline and LP-Gas models only). Do not over lubricate. 2. Engine Crankcase: Change the engine oil at the 50-hour inspection and after every 100 hours of operation thereafter. Drain the oil after the en gine has reached normal operating temperature. Fill the crankcase with five quarts of oil when the filter cartridge is replaced. The following list shows the viscosity of oil that should be used for the various temperature ranges. SAE 30--Temperatures consistently above 90 F. SAE 20--Temperatures between 90 F. and 32 F. SAE 20W--Temperatures between 32 F. and 10 F. SAE 10W--Temperatures between 10 F. and -- 10 F. SAE 5W--Temperatures below --10 F. In industrial and agricultural service, the crank case oil is frequently subjected to extremely high operating temperature. Consequently, the oil is more subject to deterioration. Varnish on the pistons, valve stems, and tappets causes sluggish operation of the engine. Sludge may eventually clog the oil pump screen, the oil passages, and the oil control rings, resulting in bearing failure or excessive piston ring wear. The American Petroleum Institute (AJP.I.) has designed a method for the classification of motor oils so that oil can be selected for the type of operation, temperatures and operating conditions experi enced. The AJ\I. classification and a brief de scription of the type of service for which each particular oil should be used, is as follows: SERVICE MS Motor Oil, which meets the re quirements of A.P.I. classification Service MS, is recommended for use in all Ford Gasoline and LP-Gas engines under the most severe service conditions. This type of operation includes the most severe loads and temperature variation. Intermittent operation during cold winter tem peratures^nd light loads promotes condensation, oil dilution and sludge formation. High summer temperatures and heavy-load service promotes oxidation of the lubricating oil and may cause high temperature varnish and sludge deposits. Service MS motor oils contain detergent com pounds that tend to hold in suspension the for eign contaminants which would normally deposit on the engine parts. DM or SUPPLEMENT 1 (S-l) Motor Oil, which meets the requirements of AP.I., is satis factory in Ford diesel engines used for general tractor operation. DS or (SERIES 3) Motor Oil, which meets the requirements of AP.I., is satisfactory for all types of operation in Ford diesel engines and strongly recommended when any one or a com bination of the following conditions may be encountered: a. High air temperatures, b. Intermittent operation at low temperature, c. Fuel contains high sulphur content. 3. Rear Axle: Remove the rear axle oil level plug and check the level of the oil. Add oil if neces sary (See Service Every 600 Hours). 4. Final Drive Housing: Remove final drive hous ing inspection plug ("Row Crop" models only) and check the oil level. Add oil as required (See Service Every 600 Hours). 5. Transmission: Remove the transmission oil level plug and check the level of the oil. Add oil as required (See Service Every 600 Hours). 6. Steering Housing: Check the oil level at the steering gear case plug and add lubricant as required. Use extreme pressure gear lubricant, SAE 90 in summer and SAE 80 in winter. Check the oil level in the power steering pump and replenish as necessary. Use only M2C41 oil in the power steering system. 7. Pedestal: Remove the tractor radiator grille and the pedestal filler opening plug. Wipe the plug dry and reinsert it into the opening, tightening to finger tightness. Remove the plug and check the oil level as indicated by the oil level mark. Add oil if necessary. (See Service Every 600 Hours.) C. Service Every 200 Hours 1. Oil Filter: Replace the filter cartridge at the time of every other oil change. Add one quart of oil to the regular crankcase fill amount to fill the cartridge. 2. Distributor: Remove the cap and dust shield. Wipe the cam, the outside of the distributor, the wires and the coil clean with a clean cloth. Apply a thin film of distributor lubricant to the dis- 418 Maintenance and Lubrication Figure 2--Lubrication C hart--Row Crop Tractors Section 2--Lubrication 419 tributor cam. Use Ford Distributor Lubricant only. 3. Generator: Oil the generator rear bearing (bush ing type only) with light oil. Do not over lubri cate. D. Service Every 400 Hours 1. Fuel Filter: Replace the diesel fuel filter ele ment and bleed the system. E. Service Every 600 Hours 1. Front Wheel Bearings: Clean the inner and outer front wheel bearings thoroughly with sol vent and repack them with a high grade short fiber grease. Lubricate the spindle shaft before replacing the bearing. 2. Four or Five-Speed Transmission: Change the transmission oil at the 50-hour inspection and every 600 hours of operation thereafter. In win ter, operate the tractor to thin the oil before draining the transmission. Fill the four-speed transmission with 6 quarts of extreme pressure lubricant and the five-speed transmission with 8 quarts. Use mild extreme pressure lubricant, SAE 80, for both summer and winter operation. 3. Select-O-Speed Transmission: The Select-OSpeed Transmission is hydraulically operated and pressure lubricated so it is very important that the proper lubrication level be maintained at all times. When adding lubricant, use only M2C41 Ford Universal Hydraulic Lubricant The oil should be changed every 1200 hours and at the time of major service or overhaul. Check the oil level by removing the oil level check and filler plug, and add oil as required. Always use the utmost caution to insure that no foreign materials enter the transmission reservoir when either removing the filler plug or adding oil to the transmission. The transmission bands should be adjusted every 600 hours to assure transmission perform ance and prevent premature failure of the bands or clutches. 4. Hydraulic System: Change the oil in the hydrau lic system at the 50-hour inspection and every 600 hours of operation thereafter. In winter, operate the system to thin the oil before drain ing. Clean the fill port carefully before removing the cap to prevent dirt from entering the system. Fill the system with 8 quarts (9 quarts required for initial fill) of M2C41 Hydraulic Oil at tem peratures above 10 F. At temperatures below 10 F., use 6 quarts of M-4684-A Hydraulic Oil and 2 quarts of M-4864-D Hydraulic Oil. IMPORTANT: Do not mix M-4684-A or M4864-D oils with M2C41 oil. 5. Differential: Change the oil in the differential at the 50-hour inspection and every 600 hours of operation thereafter. In winter, operate the trac tor to thin the oil before draining. Fill Series 600 and 601 axle with eight quarts of oil, Series 800, 801 and 1801 with eleven quarts and Series 700, 701, 900 and 901 with eight quarts. Use mild extreme pressure lubricant SAE 80, for both summer and winter operation. 6. Final Drive Housings--Row Crop Tractors Only: Change the oil in the final drive housings at the 50-hour inspection and after every 600 hours of operation thereafter. Fill each housing with one and one-half quarts of mild extreme pressure lubricant SAE 80, for both summer and winter operation. 7. Pedestal: Drain and refill with EJP. lubricant SAE 80, for both summer and winter operation. 420 Maintenance and Lubrication LUBRICATION CHART Figure 3--Lubrication C h a rt-in d u s tria l Tractors 421 SITlitBIST... BBTSTURMTOSS HYBBUUBBll A size and type for all needs QUARTS GALLONS 55 GALLON DRUMS Developed for: FORD TRACTORS FORD EQUIPMENT SHERMAN PRODUCTS OIL. USAGE CHART 1 CHANGE OIL AT THESE RECOMMENDED INTERVALS TRACTORS L0CATH5HS Rear Axle ' Differential Transmission HOOas/SBtlES 9N, 2N, 8N NAA 501,600.601,700,701,900,901 800, 801, 1801. 2030, 4030, 4040 6000 FMD, FPM (Rear Trans.) DEXTA (Rear Trans.) 9N, 2N.8N** NAA** 4-Speed** 5-Speed** Select-O-Speed 6000 FMD, FPM (Front Trans.) DEXTA (Front Trans.) 9N.2N.8N Hydraulic System Hydraulic Package Hydraulic Reservoir Pedestal NAA. 501,600,601,700, 701 800,801,900,901.1801, 2030,4030, 4040 FMD, FPM, DEXTA 1801, 4040 40506 6000 700,701,900,901 FMD, FPM Final Drive Housing 501,700,701,900,901 CHANGE OIL EVBY 600 hours 600 hours 600 hours 600 hours 1200 hours 2000 hrs. or 12 mos. 2000 hrs. or 12 mos. 600 hours 600 hours 600 hours 600 hours 1200 hours 1200 hours 1000 hrs. or 6 mos. 1000 hrs. or 6 mos. 600 hours 600 hours 2000hrs.orl2mos. 500 hrs. or 12 mos. Pump Overhaul 1200 hours 600 hours 1000 hrs. or 6 mos. 600 hours on M-4864-A (Winter) M-4864-B (Summer) M-4864-A (Winter) M-4S64-B (Summer) M-4864-A M-4864-A M-2C53-B M-4864-A(Winter) M-4864-B (Summer) M-4864-A (Winter) M-4864-B (Summer) M-4864-A (Winter) M-4864-8(Summer) M-4S64-A (Winter) M4864-B (Summer) M-4864-A M-4864-A M-2C-41 M-2C-41 M-4864-A (Winter) M4864-B (Summer) M-4864-A (Winter) M4864-B (Summer) M-4864-A (Winter) M-4864-B (Summer) M-4864-A (M-4864-D may be used in mixture with M-4864-A as required for extremely (ow temperature operation) M4864-A (Winter) M-4864-B (Summer) M-2C-41 M-2C-41 M-2041 M4864-A M4864-A M4864-A CAFAOIY *5 gallons 9 quarts 8 quarts 11 quarts 18 quarts til gallons t5 gallons * 5 quarts 6 quarts 8W quarts 1IV* quarts 12 quarts 5tt gallons 14 quarts 8 quarts t 5 gallons 10 gallons 3Vz gals. 2 quarts 4W quarts 1V4 qts. each housing Power Steering Unit 600.601.700,701 800, 801, 900. 901, 2030, 4030 Pump Overhaul M-2C-41 Row crop--2W pts. 4-wheel--3W pts. 1801, 4040, 40506 Pump Overhaul 4fe pints Ij 2N. 9N 100 hours / \ 17 Quarts 8N. NAA 100 hours 1 SAE10Wor20W-7-Winter J6 quarts Engine 501, 600. 700, 800. 900, 1801 2030. 4030, 4040 & 6000 100 hours J SAE 20 or 30--Summer J5 quarts ( FMD. FPM 200 hours | MS or DG for Gasoline Models tSVi quarts DEXTA 200 hours \ DM or DS for Diesel Models 1 quarts Common rwnw lor<Jiff#r*ntul. tntumuaon & Hydmfce System. JCommoo reservoir ter drtttnntu! & Hydaube Systtm. Sherman Reverune&Step Oom Tnnsmnuons require aned&bonal pint of aL. Jlndude* 1 quart foe reptooflg fitter. TMcro. tMCHT Sold exclusively by Ford Tractor and Implement Dealers ..MU crof tljSS&ti r THERE IS NO SUBSTITUTE FOR THE GENUINE Inferior or non-genuine parts can prove to be a hazardous and costly investment for both the dealer and his customer. Top operating per formance of Ford Tractors and Equipment can only be maintained through continued use of genuine Ford Tractor and Equipment parts. The use of non-genuine parts often results in short life and higher cost in the long run. Every genuine Ford part you sell has been designed, tested, manufactured, inspected and is guaranteed to be an exact replacement part. Further, each part bears the Ford name--a name known and respected everywhere for top quality and integrity. It's just good business to offer your customers Hie best. SELL FORD