Brake Shoe: Service and Repair
REMOVINGCAUTION:
All linings on one axle should be replaced at same time. Use linings of same quality.
Rear Drum Brake, Self-Adjusting:
1. Raise and support vehicle, remove rear wheels.
2. Remove dust cap, cotter pin, wheel nut cover and wheel nut, then the thrust washer and outer wheel bearing.
3. Remove brake drum as follows.
- Insert screwdriver in wheel bolt hole and pry up on wedge until stop.
4. Remove spring retainers from shoe retaining springs by pressing retainer against spring, then rotate 90°.
5. Unhook lower return spring.
6. Lift shoes off backing plate
7. Disconnect parking brake cable from lever.
8. Clamp shoes in vise.
Rear Brake Shoes:
9. Unhook upper return spring and adjusting wedge spring.
Rear Drum System, Tension Spring:
10. Unhook tensioning spring, remove shoes from vise.
INSTALLING
Rear Drum System:
1. Apply suitable grease to contact surface of push rod, then install tensioning spring and push rod on brake shoe.
2. Insert adjusting wedge (lug goes toward backing plate).
3. Apply suitable grease to contact surface of brake lever,install shoe with lever in push rod.
4. Connect upper return spring.
5. Hook parking brake cable on lever.
6. Place shoes on wheel cylinder pistons.
7. Connect adjusting wedge spring.
8. Install shoe retaining springs and retainers.
9. Install drums, then adjust wheel bearings as described in "Rear Axle and Suspension.
10. Depress brake pedal once firmly to set the rear brake shoes.
NOTE:
- To inspect brake lining thickness, condition, remove plug on lower surface of backing plate.
- Brakes automatically adjust as necessary during every brake pedal application. Fixed clearance between brake shoes and brake drum is set when pressing and releasing pedal. When brake linings wear, movement of brake shoes is greater than fixed clearance. At this point adjusting wedge is moved down further by spring tension into pushrod slot. This automatically assures proper brake shoe adjustment.