Diesel Data: Automotive Repair

Removal and Replacement




Parking Brake Shoe Replacement

CAUTION
Frequent inhalation of brake shoe dust, regardless of material composition, could be hazardous to your health.
- Avoid breathing dust particles.
- Never use an air hose or brush to clean brake assemblies. Use an OSHA-approved vacuum cleaner.



Disassembly

1. Raise and support the vehicle Service and Repair.

2. Remove the rear wheels.

3. Release the parking brake, and remove the brake disc/drum Rear Brake Disc Replacement.

4. Disconnect and remove the upper return springs (A).






5. Remove the tension pins (A) by pushing the respective retainer springs (B), and turning the pin.






6. Disconnect the rod spring (A), and remove the connecting rod (B).





7. Lower the parking brake shoe assembly.

8. Remove the forward brake shoe (A) and the adjuster assembly (B) by removing the lower return spring (C).






9. Remove the rearward brake shoe (A) by disconnecting the parking brake cable (B) from the parking brake lever (C).






10. Remove the U-clip (A), the wave washer (B), the parking brake lever (C), and the pivot pin (D) from the brake shoe (E).






Reassembly

1. Apply a thin coat of Molykote 44MA grease to the sliding surface of the pivot pin (A), and insert the pin into the rearward brake shoe (B) from the outside.





2. Install the parking brake lever (C) and the wave washer (D) on the pivot pin, and secure the pin with a new U-clip (E).

- Install the wave washer with its convex side facing out.
- Pinch the U-clip securely to prevent the pivot pin from coming out of the brake shoe.

3. Connect the parking brake cable (A) to the parking brake lever (B). Apply Molykote 44MA grease to the cable contact surface (C) on the backing plate.






4. Apply a thin coat of Molykote 44MA grease to the shoe ends and connecting rod ends (A), sliding surfaces of the pivot pin (B), and sliding surfaces of the parking brake shoe (C) as shown. Wipe off any excess. Keep grease away from the brake linings.






5. Install clevis pin A and B on the adjuster (C).

NOTE:

- Clean the threaded portions of clevis pin A and the sliding surface of clevis pin B, then coat them with Molykote 44MA grease.
- Shorten clevis pin A by fully turning the adjuster nut.





6. Position the brake shoe adjuster assembly (D), and hook the lower return spring (E) on the parking brake shoes.

7. Install the rod spring (A) to the connecting rod (B) first with the spring end (C) pointing downward. Then hook the rod spring to the parking brake shoe, and install the connecting rod on the parking brake shoes.






8. Install the tension pins (A) and the retainer springs (B). Make sure the tension pin does not contact the parking brake lever.






9. Install the upper return springs (A).





10. Install the brake disc/drum and brake caliper assembly Rear Brake Disc Replacement.

11. Do the major adjustment for the parking brake.

12. Clean the mating surfaces between the brake disc/drum and the inside of the wheel, then install the rear wheel.