Brake Shoe: Service and Repair

Rear Brake Components:

REMOVE OR DISCONNECT
1. Rear brake drum. Refer to Rear Brake Drum Replacement.

CAUTION: Keep fingers away from rear brake shoe springs to prevent fingers from being pinched between spring and shoe web or spring and backing plate.

2. Return springs (1) using J 8049.
3. Hold-down springs (3) and pins (5) using suitable pliers.
4. Actuator pivot (43.
5. Actuator link (6) while lifting up on actuator (7).
6. Actuator (7) and actuator return spring (8).
7. Shoe guide (32), strut (9) and strut spring (10).
8. Primary shoe (13) and secondary shoe (14) from backing plate (29) and parking brake rear cable.
9. Adjuster (31) and spring (15).

Removing Park Brake Cable:

10. Parking brake cable from parking brake lever (12) by pushing parking brake lever (12) into parking brake cable return spring (30). Disengage cable end from parking brake lever (12).
11. Primary shoe (13) with parking brake lever (12) and parking brake cable return spring (30).
12. Parking brake lever (12).
a. Pry open retainer ring (17), remove and discard.
b. Push out pivot pin (11).

Rear Brake Shoe Adjuster:

CLEAN
1. Adjuster (31). Clean adjusting screw threads with wire brush. Wash all components in clean denatured alcohol. Lubricate shoes and adjuster screw threads with a film of GM P/N 1052196 lubricant or equivalent, inside diameter of adjust socket (16) and adjust socket face. Adequate lubrication is achieved when a continuous bead of lubricant is at open end of adjust nut (18) and adjust socket (16) when threads are fully engaged.
2. Backing plate (29) and lubricate contact surfaces with brake lubricant, GM P/N 1052196 or equivalent. Inspect Threads of adjuster (19) for smooth rotation over full length. Inspect All parts. If any parts are of doubtful strength or quality due to discoloration from heat, overstress, or wear, the parts should be replaced.

INSTALL OR CONNECT
1. Parking brake lever (12).
a. Insert pivot pin (11) through holes in primary shoe (13) and parking brake lever (12).
b. Install and crimp new retainer ring (17).
2. Parking brake cable to parking brake lever (12) by pulling back parking brake cable return spring (30). Engage cable end into parking brake lever (12).
3. Adjuster (31) and spring (15).
4. Primary shoe (13) and secondary shoe (14) to backing plate (29) and parking brake rear cable.
a. Start the shoe spring tang into the piston near the I.D. of the shoe.
b. Pull up on the shoe, compress the shoe spring tang, and rotate the shoe towards the piston face until the opposite shoe spring tang snaps into the piston. Shoes should lay flat against piston.
c. After installing the shoes, check that the boot is not touching the shoes. If it is, remove the shoes and re-seat or reposition the boot.
5. Strut (9) and strut spring (10) by spreading primary shoe (13) and secondary shoe (14) apart For proper positioning:
a. Strut end without strut spring (10) engages parking brake lever (12) and primary shoe (13) or secondary shoe (14).
b. Strut end with strut spring (10) engages opposite primary shoe (13) or secondary shoe
6. Shoe guide (32).
7. Actuator (7) and actuator return spring (8).
8. Pins (5), actuator pivot (4) and hold-down springs (3).
9. Actuator link (6) on anchor pin.
10. Actuator link (6) into actuator (7) while holding up on actuator (7).
11. Return springs (1) using J 8057.
12. Rear brake drum. Refer to Rear Brake Drum Replacement.