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BRAKES 5 - 45 |
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REAR DISC BRAKES
INDEX
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Assembling Rear Disc Brake Caliper . . . . . . . . . |
. 50 |
Brake Shoe Removal . . . . . . . . . . . . . . . . . . . . . |
. 46 |
Cleaning and Inspection . . . . . . . . . . . . . . . . . . . |
. 49 |
Disassembling Rear Caliper Assembly . . . . . . . . |
. 48 |
GENERAL INFORMATION
The rear disc brakes are similar to front disc brakes, however, there are several distinctive features that require different service procedures. This single piston, floating caliper rear disc brake assembly includes a hub assembly, adapter, braking disc (rotor), caliper, shoes and linings. The parking brake system on all vehicles equipped with rear disc brakes. Consists of a small duo-servo drum brake mounted to the caliper adapter. The drum brake shoes expand out against a braking surface (hat section) on the inside area of the braking disk (rotor).
The AC and AY body vehicles are equipped with a caliper assembly that has a 36 mm (1.42 inch) piston, and utilizes a 14 inch solid braking disc (rotor).
The AA body vehicle are equipped with a caliper assembly that uses a 34 mm (1.34 inch) piston. The AA body uses the same 14 inch solid braking disc (rotor) as on the AC and AY applications. Also available on the AA body is a caliper assembly with a 36 mm (1.42 inch) piston, with a 15 inch vented braking disc (rotor).
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General Information . . . . . . . . . . . . . . . . . . . . . . |
. 45 |
Lining Wear . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 45 |
Service Precautions . . . . . . . . . . . . . . . . . . . . . . |
. 46 |
The AG and AJ body vehicles are also equipped with different size caliper pistons depending on the size and type of braking disk used on the vehicle. The 149 solid braking disk (rotor) applications use a 34 mm (1.34 inch) piston, and the 159 vented braking disk (rotor) applications use a 36 mm (1.42 inch) piston.
The caliper assembly on all applications float on rubber bushings using internal metal sleeves which are attached to the adapter using threaded guide pin bolts.
The adapter is mounted to the rear axle of the vehicle and is used to mount the brake shoes and actuating cables for the parking brake system. The adapter also mounts the rear caliper assembly to the vehicle. The adapter has two machined abutments which are used to position and align the caliper and brake shoes for movement for and aft (Fig. 1)
LINING WEAR
To check the amount of lining wear, remove the wheel and tire assemblies. If a visual inspection does not adequately determine the condition of the lining,
Fig. 1 Rear Disc Brake Assembly