GM replacement rear brake shoe material
is recommended for all vehicles to maintain the balance between front and
rear brake performance. GM replacement brake parts have been carefully
selected to provide the proper brake balance for the purposes of stopping
distance and control over the full range of operating conditions. Installation
of front or rear brake material with performance different from that
of GM replacement parts recommended for this vehicle can change the
intended brake balance of the vehicle.
Removal Procedure
Caution: Avoid taking the following actions when you service wheel brake parts:
• | Do not grind brake linings. |
• | Do not sand brake linings. |
• | Do not clean wheel brake parts with a dry brush or with compressed air. |
Some models or aftermarket brake parts may contain asbestos fibers which can
become airborne in dust. Breathing dust with asbestos fibers may cause serious bodily
harm. Use a water-dampened cloth in order to remove any dust on brake parts. Equipment
is available commercially in order to perform this washing function. These wet methods
prevent fibers from becoming airborne.
- Raise the vehicle and support the vehicle with safety stands.
- Remove the tire and the wheel. Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Install the pin into the park brake lever. Refer to
Parking Brake Cable Adjuster Enabling
in Parking
Brake.
- Remove the rear brake drum. Refer to
Drum Brake Adjustment
.
- Remove the rear brake
shoe return springs (7,8).
- Remove the hold-down springs (9).
- Remove the hold-down pins (15).
- Remove the shoe guide (3).
- Remove the rear brake shoe actuator (11) and the spring (10).
- Remove the rear brake shoe actuator link (6).
- Remove the rear parking brake lever strut (4) and spring (2).
- Remove the rear brake shoe adjuster spring (13).
- Remove the rear brake shoe adjuster (12).
- Remove the rear brake shoes (1,14).
- Inspect all of the parts for discoloration due to heat or stress.
Replace as needed.
- Inspect all of the parts for signs of wear. Replace
as needed.
- Inspect the rear brake cylinder for signs of leakage. If any is
found, refer to
Wheel Cylinder Overhaul
.
- Inspect the rear brake drum for scoring and machining tolerance.
Refer to
Brake Drum Inspection
in
Drum Brakes.
Installation Procedure
- Lubricate the rear brake
backing plate and the adjusting screw threads with a thin coat of white lithium
grease.
- Install the rear brake shoes (1,14).
- Install the rear brake shoe adjuster (12).
Important: Do not interchange the right and left brake shoe adjusting screws.
- Install the rear brake shoe adjuster spring (13). The coils of the adjusting
screw spring must not touch the adjusting screw.
- Install the rear park brake lever strut (4) and spring (2).
- Install the rear brake shoe actuator link (6).
- Instal the rear brake shoe actuator (11) and spring (10).
- Install the shoe guide (3).
- Install the hold-down pins (15).
- Install the hold-down springs (9).
- Install the rear brake shoe return springs (7,8).
- Install the rear brake drum to the vehicle. Refer to
Brake Drum Replacement
.
- Remove the pin to the park brake lever. Refer to
Parking Brake Cable Adjuster Enabling
in Parking
Brake.
- Install the tire and the wheel. Refer to
Tire and Wheel Removal and Installation
in Tires
and Wheels.
- Adjust the rear brakes. Refer to
Drum Brake Adjustment
.
- Adjust the park brake. Refer to
Park Brake Cable Service/Adjustment
in Park Brake.
- Remove the safety stands. Lower the vehicle.