Brake Shoe: Service and Repair

NOTE: Raise vehicle and suitably support. Mark relationship of wheel to axle flange to insure proper wheel balance upon assembly. Mark relationship of brake drum to axle flange to insure proper wheel balance upon assembly.

REMOVE OR DISCONNECT
1. Tire and wheel assembly.
2. Brake drum. If difficulty is encountered in removing the brake drum, the following steps may be of assistance. Make sure parking brake is released. Back off parking brake cable adjustment. Use a rubber mallet to tap gently on outer rim of the drum and/or around inner drum diameter by spindle. Take care not to deform the drum by use of excessive force.
3. Return springs (1 and 2) using J 8049 or J 29840 pliers.
4. Hold-down springs (3) and pins (5) using suitable pliers.
5. Actuator link (6) while lifting up on actuator lever (7).
6. Actuator lever (7), lever return spring (8) and bearing sleeve (4).
7. Parking brake strut (9) and strut spring (10).
8. Shoe and lining assemblies (11 and 12) after disconnecting parking brake cable.





9. Adjusting screw assembly (29) and adjusting screw spring (13).
10. Retaining ring (17), pin (18) and parking brake lever (19) from secondary shoe (12).

NOTES:
^ If any parts are of doubtful strength or quality due to discoloration from heat, over-stress, or wear, the parts should be replaced.

CLEAN
Before reinstalling adjusting screw assembly (29) it must be disassembled, thoroughly cleaned and lubricated.
^ Clean adjusting screw (16) threads with a wire brush.
^ Inspect threads of adjusting screw (16) for smooth rotation over full length.
^ Wash all components in clean denatured alcohol.
^ Apply brake lubricant GM P/N 1052196 (or equivalent) to the adjusting screw (16) threads, inside diameter of socket (14) and socket face. Adequate lubrication is achieved when a continuous bead of lubricant is at open end of pivot nut (15) and socket (14) when threads are fully engaged.
^ Lubricate 6 pads on backing plate where brake shoes contact backing plate.


INSTALL OR CONNECT
1. Parking brake lever (19) on secondary shoe (12) with pin (18) and retaining ring (17).
2. Adjusting screw assembly (29) and adjusting screw spring (13).
3. Shoe and lining assemblies (11 and 12) after attaching parking brake cable.
4. Parking brake strut (9) and strut spring (10) by spreading shoes (11 and 12) apart. To be properly positioned: The end without the strut spring (10) should engage the parking brake lever (19) and secondary shoe and lining (12). The end with the strut spring (10) should engage the primary shoe and lining (11).

NOTE: In the next step, the bearing sleeve (4) must be installed between the secondary shoe an lining (12) and the actuator lever (7).





5. Bearing sleeve (4), actuator lever (7) and lever return spring (8).
6. Hold-down pins (5) and hold-down springs (3).
7. Actuator link (6) on anchor pin (32).
8. Actuator link (6) into actuator lever (7) while holding up on lever.
9. Shoe return springs (1 and 2) using J 8057 pliers. Adjust Brakes.
10. Brake drum, aligning previous marks.
11. Tire and wheel assembly.
12. Lower vehicle.
13. Tighten wheel nuts to specified torque. Adjust Parking brake.