Document MoJDyORBEER3X406bzkwdzBJM

MULTIBESTOS HANDBOOK FOR BRAKE SERVICE Lockheed Hydraulic Brake Adjustments (Continued/ A* anchor bolt* are esse hardened, it ! necessary to grind off hardened aurface of threaded end so that it mag be slotted. Whenever possible replace shoe*, anchors, etc., from tame place as originally removed. This avoid* considerable unnecessary labor in making adjustments. If new fluid in Hydraulic system it necessary, use only new, clean Hydraulic fluid: Bleeding of Hydraulic brake systems Is recommended by following the procedure as outlined below. (See Page* 44-46 for more information on Hydraulic aystema.) Use two men, one man at the brake mechanism and one man in the car. Keep the supply tank filled at all timet (master cylinders with the supply tank caat in the tame unit require filling after four strokes). An automatic refilling tool for the brake master cylinder as Illustrated in Fig. 1 will prevent it from running dry during tbe bleeding operations, Th* man in the car should pump up'pressure with the pedal, bolding that pressure with .Us foot. The maw at th* brake unlocks the bleeding system H turn. Tbe man in the.ear pushes on th* pedal, and' before it strikes the floor he should Instruct the msn at the brake to lock the system. This operation should be repeated four or five rimes on each wheel in the following order: 1. Right rear..- ' 2. Right front. ' 3. tsft rear.. ' . ^ -4. Left fron*. . - This method of bleeding assures removal of all air in the front line and avoid* th* possi bility of spongy pedal and poor performance. ' There are two arrange* ments of the step-bore cylinder*' found on 193$ cars. In one class the ' larger cylinder, operates th*' reverse acting shoe, giving more uniform wear of the brake linings. This arrangement Is found on car* in the Chrysler group. In the other class th* larger bore cylinder operates the forward acting shoe, giving a very effective brake. This arrangement is found on 1935 Studebakcrs. . , Cars in the last named class have experienced excessive forward acting shoe lining wear. It has been found that the wheel cylinder* can be interchanged right front with left front, right rear with left rear, giving a system where the larger bore cylinder act* at the reverse acting shoe. A* only three studs are used to bold the brake cylinder to the backing plate. It it nscessacy in making, {his chang# to drill one new hole in the backing plate. . 36 MULTIBESTOS HANDBOOK FOR BRAKE SERVICE Oftentimes ring gauge or dummy drum is not available for adjusting Hydraulic brake system*. The following It a method of adjusting Hydraulic brtfcea without the use of either of these useful appliances. A Adjusting Hydraulic Brakes Without a Ring Gauge The adjustment of Hydraulic brakes with a ring gauge very simple, but when no ring gauge is available and there are no peep holes in the drum, a correct adjustment is often quite difficult to make. Tho method of "feeling in" the shoes as given in detai' below has proved very satisfactory and can be easily mastered after few trials. 1. If eccentric anchor bolt* are not slotted for a screw driver remove them from the backing plate, grind off the casehardened aurface and slot the end with two hacksaw blades placed aide by aide in the same handle. Slot all anchors In s like location ao that the slot is at right angles to the high and low side* of the eccentric anchor (see Fig. A). 2. Replace anchors and shoes in brake mechanism and turn eccentric anchors by means of screw driver inward and toward the axle so that the shoe is thrown as far away from drum as possible. Also turn cams inward and toward the axis. All shoes will then be in a position as shown in Pig. 1. 3. Adjust one shoe at a time. Turn' cam out and away from axle until brake juat drags. (See Fig. Z.) 4. Turn eccentric anchor inward and toward the axle by means of screw driver until drum turns freely (Fig. 3). Hots that the movement of the anchor lowers the shoe to that lining at toe of shoe no longer drags. 5. Again turn cam outward and away from axle until toe of shoe just drags on drum (Fig. 4). S. Then turn eccentric anchor in same direction as in (4) until drum turns freely. 7. Repeat (S) and (6) until further turning of anchor will not free the drum from the drag obtained by setting out cam When this condition is reached, shoe wiil be in a position as indicated in Fig. 5. 8. Then back off both anchor and cam very slightly until drum turns freely. 9. Repeat the above procedure on all shoes, and a brake adjustment very close to the tolerances of .005" clearance at heel and .010" clearance at toe will be obtained. (See Pig. 6.)