Document zo5LnkRGMR7wjr3dbg25pqr0

f 9-22 '-<6* GROUP 9-BRAKES AND SUSPENSION \ Tmncrman nuts and remove the eliminate the scores and true up the pivot hook from the lara- h i brake drum. drum. The refmished diameter must secondary shoe web boVo, ~ v If the brake drum will not come off, insert a narrow screw driver through the brake adjusting hole in the carrier plate, and disengage the adjusting lever from the adjusting screw. While thus holding the ad justing lever away from the adjust ing screw, back off the adjusting not exceed 0.060 inch oversize (10.060 inches). If the drum diameter is less than 0.030 inch oversize (10 030 inches) after refinishing, standard lining may be installed If the drum diameter is 10.030-10.060 inches, oversize linings must be installed. to pry the pivot hook oui hole. 1 4. Remove the automatic a < spring and adjusting lcver `,j. On front brakes, remove the - retracting assist spring. " 'r 5. Remove the secondary screw with the brake adjusting tool After a drum is turned dow'n, anchor spring with the tool Nhc 11 (Pig 61. Rack off the adjustment only wipe the refinished surface with a Fig. 7. With the same tool ~ if the drum cannot be remosed. Re cloth soaked in clean denatured the primary shoe to anchor very careful not to burr, chip, or alcohol If one drum is turned down, and unhook the cable anchor ' damage the notches in the adjusting the opposite drum on the same axle 6. Remove the cable guide - I screw; otherwise, the self adjusting mechanism will not function prop should also be cut down to the same size. the secondary shoe (Fig ' i j erly. 7. Remove the shoe hold-;~- BRAKE SHOE AND ADJUSTING springs, shoes, adjusting screw. -- INSTALLATION SCREW REMOVAL AND nut, and socket. '' ~ 1. Remove the protective coating from a new drum with carburetor degreaser. 2. Place the drum over the brake assembly and into position Install the 3 iinnerman nuts and tighten securely. If it was necessary to back off the brake adjustment, in step 2 above, adjust the brakes as outlined in this section. 3. Install the wheel and tire as sembly and hub cap. BRAKE DRUM REFINISHING Minor scores on a brake drum can INSTALLATION CLEANING AND INSPECT ION 1. Remove the wheel and drum Wash all the parts except the brake shoes in a cleaning fluid and dry with compressed air. 2. Brush all dust from the carrier plates and interior of the brake drums. 3. Inspect the brake shoes for ex cessive lining wear or shoe damage If the lining is worn to within Vi; inch of the rivet heads or if the shoe are damaged, they must be re placed Replace any lining that has been oil saturated. Replace lining in axle sets Prior to replacement of lining, the drum diameter should be 8. On rear brakes, remove parking brake link and sprinc ~ connect the parking brake from the parking brake lever 9. After removing the rear cr.tr secondary shoe, disassemble c-j parking brake lever from the shoe - removing the retaining clip r-r spring washer (Fig 1) INSTALLATION 1. Before installing the rear w.t: shoes, assemble the parking lever to the secondary shoe arc * cure with the spring washer ar,c ~ taming clip. 2. Apply a light coating of 1t> be removed with a fine emery cloth. A drum that is excessively scored or checked to determine if oversize or shimmed linings must be installed temperature grease at the where the brake shoes contact - * shows a total indicator runout of over 0.00? inch should be turned down. Remove only enough stock to 4. Inspect all other brake pans and replace any that are worn or damaged. 5. Inspect the brake drums and, if necessary, refinish as outlined in this section earner plate. 3. Position the brake shoes ct carrier plate, and install the down spring pins, springs, and On the rear brake, install the ra k , brake link and spring Connee- parking brake cable io the r-1-1' ' REMOVAI 1. With the wheel and drum re moved, install a clamp over the ends of the brake cylinder as shown in Fig ?. 2. Contract the shoes as follows a. Disengage the adjusting lever from the adjusting screw by pulling backward on the adjusting lever (Fig 1) b. Move the outboard side of the adjusting screw upward and back off the pivot nut as far as it will go hrake lever (Fig b 4. Place the cable anchor o'-" anchor pin with the cr.n.pvtoward the carrier plJte . _ 5. Install the prints anchor spring vmh the tovi v in Fig. 8. .. 6. Install the cable gu,Jl- ` - secondary shoe xvcb . * hole fitted into the ^" secondary shoe vo " ` . cable around the cjoie .-"u,v ` iFig 1). ^v FIG. 7--Retrocting Spring Removol 3. Pull the adjusting lever, cable and automatic adjuster spring down jnd towjrd the rear to unhook the It Ls iniperati'e tl>Jt positioned in Ibis groo*i > tween the guide and " ^ SCF-FORD-0351 PART 9-4-HYDRAULIC AND PARKING BRAKES 9-23 7. Install the secondary shoe to anchor spring (Fig. 8). Be certain that (he cable end is not cocked or binding on (he anchor pin when installed. All parts should be flat on the Bnchor pin. Remove the brake cylinder clamp. On front brakes, install the shoe retracting assist spring. 8. Apply high-temperature grease to the threads and the socket end of the adjusting screw. Turn the ad justing screw into the adjusting pivot nut to the limit of the threads and then back ofl Vi turn Interchanging the brake shoe ad justing screw assemblies from one side of the car to the other would cause the brake shoes to retract rather than expand each time the automatic adjusting mechanism operated, lo prevent installation on the wrong side of the car, socket end of the adjusting screw is stamped with an R or L (Fig 9) The adjusting pivot nuts can be distinguished by the number of lines machined around the body of the nut. Two lines indi cate a right hand nut; one line indi cates a left hand nut. 9. Place the adjusting socket on the screw and install this assembly between the shoe ends with the ad justing screw nearest the secondary shoe. JO. Hook the cable hook into the hole in the adjusting lever from the backing plate side. The adjusting levers are stamped with an R or L to indicate their installation on a right or left hand brake asembly (Fig. 9). FIG. 8--Retrocting Spring Installolion 11. Position the hooked end of the adjuster spring into the large hole in the primary shoe web, and con nect the loop end of the spring to the adjuster lever hole. 12. Pull the adjuster lever, cable and automatic adjuster spring down and toward the rear to engage the pivot hook in the large hole in the secondary shoe web (Fig 1). 13. After installation, check the action of the adjuster by pulling the section of the cable between the cable guide and the adjusting lever toward the secondary shoe web far enough to lift the lever past a tooth on the adjusting screw wheel. The lever should snap into position be hind the next tooth, and release of the cable should cause the adjuster spring to return the lever to its original position. This return action of the lever will turn the adjusting screw 1 tooth. If pulling the cable does not pro duce the action described, or if the lever action is sluggish instead of positive and sharp, check the po sition of the lever on the adjusting screw-toothed wheel. With the brake in a vertical position (anchor at the top), the lever should contact the ad justing wheel }le inch (plus or minus Vfo inch) above the center line of the screw. Jf the contact point is below this center line, the lever will not lock on the teeth in the adjusting screw wheel, and the screw' will not be turned as the lever is actuated by the cable To determine the cause of this condition' a. Check the cable end fittings. The cable should completely fill or extend slightly beyond the crimped section of the fittings, If it does not meet this specification, possible dam age is indicated and the cable assem bly should be replaced. b. Check the cable length. The cable should measure 11 Vfe inches (plus or minus 1/64 inch) from the end of the cable anchor to the end of the cable hook c. Check the cable guide for dam age. The cable groove should be par allel to the shoe web, and the body of the guide should lie fiat against the web. Replace the guide if it shows damage d. Check the pivot hook on the lever. The hook surfaces should be square with the body of the lever for proper pivoting Repair the hook or replace the lever if the hook shows damage. e. See that the adjusting screw socket is properly seated in the notch in the shoe web. ADJUSTMENT The hydraulic service brakes are self-adjusting and require a manual adjustment only after the brake shoe have been relined, replaced, or when the length of the adjusting screw has been changed while per forming some other service oper ation. 1. After the shoes have been in stalled or the adjusting screw' has been turned, install the drum Be sure that all excess grease, oil, and other foreign material are wiped oft the carrier plate and drum. Before installing the brake drum on the front w'heel spindle, wipe the spindle completely free of grease. In stall the drum carefully so that the grease seal retainers w'lthin the hub W'lll not be damaged. 2. Remove the adjusting hole cov er from the earner plate and, from the carrier plate side, turn the ad justing screw upward to expand the shoe (Fig. 10) Expand the shoes un til a slight drag is felt when the drum is rotated. 3. Remove the drum. While hold ing the adjusting lever out of en gagement with the adjusting screw, back off the adjusting screw Vi of a turn with the fingers If finger move ment will not turn the screw, free it up. otherwise, the self-adjusting lever will not turn the screw. Lubricate the screw w'tth oil and coat with wheel bearing grease. Any other adjustment procedure may cause damage to the adjusting screw with consequent self-adjuster problems. FIG. 9--Adjusting Screw ond Lever Identification 8003 0592 PRODUCED BY FORD 9-24 GROUP 9-BRAKES AND SUSPENSION FIG. lO--Exponding Broke Shoes 4. Apply a small quantity of hightemperature grease to the points where the shots contact the earner plate, being careful not to git the lubricant on the linings. Insull the wheel and drum 5. Install the adjusting hole cover on the brake carrier plate. 6. When adjusting the rear brake shoes, check the parking brake cables for proper adjustment. Make sure that the equahrer lever operates freely. 7. After the brake shoes have been properly adjusted, check the operation of the brakes BRAKE SHOE HEMMING Brake linings that are worn to within Va inch of the rivet or have been saturated with grease or oil should he replaced. Failure to re place worn linings will result in a scored drum. When it is necessary to replace linings, they must also be re placed on the wheel on the opposite side of the car. Inspect brake shoes for distortion, cracks, or looseness If this conditon exists, the shoe should be discarded Do not repair a defective brake shoe. 1. Wash the brake shoes thor oughly in a clean solvent. Remove all burrs or rough spots from the shoes. 2. Check the inside diamcier of the brake drum If the drum is less than 10.030 inches, standard lining may be installed If the diameter is 10.030 inches or over, oversiec lining should be installed * 3. Position the new lining on the shoes btart'ng ,n the center, insert and secure the rivets, working j.ter- nately towards each end. Install all parts supplied in the kit. Ford re placement linings are ground and no further grinding Is required. 4. Check the clearance between the shoe and linings The lining must seal tightly against the shoe with not more than 0 005-inch clearance be tween any 2 rivets. BRAKE CYLINDER REPLACEMENT REMOVAL 1. With the wheel in a raised po sition, remove the wheel and the drum. 2. Place a clamp over the ends of the brake cylinder as shown tn Fig. 8 3. Remove the brake shoe assem blies, following procedures outlined in this section 4. Disconnect the brake line from the brake cylinder. To disconnect the hose at a front cylinder, loosen the tube fitting that connects the oppo site end of the hose to the brake tube at a bracket on the frame. Remove the horseshoe-type retaining clip from the hose and bracket, dis engage the hose from the bracket, then unscrew the entire hose assem bly from the front brake cylinder. At a rear cylinder, unscrew the fitting that connects the tube to the cylinder. Be sure the engine is slopped and there is no vacuum in the booster system before discon necting the hydraulic lines. 5. Remove the brake cylinder re taining bolts and lock washers and remove the cylinder. Remove the clamp from the cylinder. INSTALLATION J. Insert the cylinder into the opening on the carrier plate and in stall the retaining bolts and lock washers Install a front wheel cylin der with the inlet toward the rear of the car. 2. On a front cylinder, install a new copper gasket over the hose fit ting Screw the hose assembly into the cylinder. Engage the opposite end of the hose to the bracket on the frame, install the horseshoe-type re taining clip, and connect the brake tube to the hose with the tube fitting nut lighten the nut to specification with tool 1112-144. On j rear cylinder, connect the tube to the cylinder by tightening the tube fitting nut to the cylinder. Tighten the nut Jo specification with tool 1112-144. 3. Install the links in the ends of the brake cylinder, install the shoe and adjuster assemblies, and adjust the shoes as outlined in this section 4. Install the brake drum and wheel, then bleed the brakes as out lined in this section. ` BRAKE CYLINDER OVERHAUL It is not necessary to remove the brake cylinder from the carrier plate to disassemble, inspect, or hone and overhaul Removal is necessary only when the cylinder is damaged or scored beyond repair. DISASSEMBLY 1. With the wheel in a raised posi tion, remove the wheel and the drum. 2. Place a clamp over the ends of the brake cylinder as shown in Fig 8 3. Remove the brake shoe assem blies following procedures outlined in this section. 4. Remove the links and the rub ber bools from the ends of the brake cylinder. Remove the pistons, cups, and return spring from the cylinder bore (Fig 11). 5. Remove the bleeder screw from the cylinder INSPECTION 1. Wash all parts in clean de natured alcohol and dry with com pressed air. 2. Check all internal parts for ex cessive wear or damage. If any of the internal parts require replacing, all should be replaced. 3. Insjsect the cylinder bore for score marks or rust. If either condi tion is present, the cylinder bore must be honed. However, the cjlinder should not be honed more than 0.003 inch beyond its original diam eter. 4. Check the bleeder hole to be sure that it is open ASSF.MRLY 1. Apply a coating of heavy-duty- brake fluid to all internal parts. 2. Thread the bleeder screw into the cylinder and tighten securely. 3. Insert the return vpr re, ,.ups. and pistons into their re.pe.: < pc- 8003 0593 PRODUCED BY FORD