Brake Shoe: Service and Repair

GM replacement brake lining material is recommended for this vehicle 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 lining material with performance characteristics different from the recommended GM replacement parts can change the intended brake balance of this vehicle.

Removal Procedure
1. Raise the vehicle.
2. Remove the tire and wheel assembly.
3. Mark the relationship of the brake drum to the axle.





4. Remove the brake drum.
5. Remove the brake shoe return springs.





6. Remove the brake shoe guide.





7. Remove the hold down springs.
8. Remove the hold down pins.
9. Remove the actuator lever and the actuator lever pivot.
10. Remove the actuator lever and the lever pivot.
11. Remove the lever return spring.





12. Remove the parking brake strut and the strut spring.
13. Remove the parking brake lever.





14. Remove the brake shoes.
15. Remove the adjusting screw assembly and the adjusting screw spring from the brake shoes.
16. Inspect all parts for discoloration due to heat or stress. Replace parts as needed.
17. Replace all worn parts.
18. Inspect the wheel cylinder for signs of leakage. If there are signs of leakage, overhaul or replace the wheel cylinder.
19. Inspect the brake drum for scoring and machining tolerance.

Installation Procedure





1. Lubricate the brake shoe backing plate, the adjusting screw threads, socket and socket face with a thin coat of white lithium grease or equivalent.

Important: Do not interchange the right and left adjusting screws.





2. Install the adjusting screw assembly and the adjusting screw spring on the brake shoes. The coils of the adjusting screw spring must not touch the adjusting screw.
3. Install the brake shoes on the backing plate.





4. Install the parking brake lever.
5. Install the strut spring on the parking brake strut.
6. Install the parking brake strut.





7. Install the actuator lever and the lever pivot.
8. Install the actuator lever return spring.
9. Install the hold down pins.
10. Install the hold down springs.





11. Install the brake shoe guide.





12. Install the brake shoe return springs.
13. Install the brake drum. Align the marks made during disassembly.
14. Install the tire and wheel assembly.
15. Adjust the brakes.
16. Lower the vehicle.