- Depress the brake pedal 3 times with 30 kg (66 lbs) of force using the Brake Pedal Effort Gage tool J 28662.
- Raise and safely support the rear of the vehicle securely on jackstands.
- Rotate each rear tire and wheel assembly in order to inspect the brake shoe drag on the brake drum.
- If the brake shoe drag on the brake drum is not correct, remove the tire and wheel assembly.
- Remove the brake drum.
- Insert the Drum-to-Brake Shoe Clearance Gage J 21177-A to the braking surface of the drum.
- Position the Drum-to-Brake Shoe Clearance Gage J 21177-A over the linings on the brake shoes.
- Turn the adjuster until the primary and the secondary shoes contact the Clearance Gage.
- Install the brake drum.
- Depress the brake pedal 3 times with 30 kg (66 lbs) of force using the Clearance Gage.
- Rotate the brake drum in order to inspect the brake shoe drag on the brake drum. Verify the brake shoe drag on the brake drum is correct.
- Install the tire and wheel assembly.
- Lower the vehicle.
Removal & Installation
Dust and dirt accumulating on brake parts during normal use may contain asbestos fibers from production or aftermarket brake linings. Breathing excessive concentrations of asbestos fibers can cause serious bodily harm. Exercise care when servicing brake parts. Do not sand or grind brake lining unless equipment used is designed to contain the dust residue. Do not clean brake parts with compressed air or by dry brushing. Cleaning should be done by dampening the brake components with a fine mist of water, then wiping the brake components clean with a dampened cloth. Dispose of cloth and all residue containing asbestos fibers in an impermeable container with the appropriate label. Follow practices prescribed by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) for the handling, processing, and disposing of dust or debris that may contain asbestos fibers.
- Raise and safely support the vehicle.
- Remove the rear wheel(s).
- Remove the brake drum.
- Using a suitable tool, remove the brake shoe return spring.
- Using a brake spring hold-down tool, disengage the hold-down spring and retainers from the front shoe. Remove the hold-down retainer pinch
- Disconnect the anchor spring from the front shoe and remove the front shoe.
- Remove the anchor spring from the rear shoe. Using a brake spring hold-down tool, disengage the hold-down spring and retainers from the rear shoe. Remove the hold-down pinch
- Disengage the parking brake lever from the parking brake cable and remove the rear shoe.
- Remove the C-washer, the automatic adjuster lever and spring, the C-washer, and the parking brake lever from the rear shoe.
- Thoroughly clean the backing plate and brake hardware with brake cleaning solvent. Apply high temperature grease to the backing plate shoe contact points, anchor plate and shoe contact points, adjusting bolt, and adjuster and brake shoe contact points.
- Reinstall the automatic adjuster lever and the parking brake lever to the rear shoe using new C-washers.
- Connect the parking brake lever to the parking brake cable. Set the adjuster and spring to the rear shoe.
- Set the rear brake shoe in place, install the hold-down pin and install the hold-down spring and retainers. Make sure that the shoe is inserted in the wheel cylinder and that the other end is in the anchor plate.
- Install the anchor spring to the rear shoe.
- Install the front shoe to the other end of the anchor spring and set the front shoe in place. Make sure that the front shoe engages the wheel cylinder, adjuster mechanism and spring, and the anchor plate.
- Reinstall the front brake shoe hold-down pin and secure with the hold-down spring and retainers using a suitable tool.
- Install the return spring.
- Install the brake drum and pull the parking brake lever all the way up until a clicking sound can no longer be heard.
- Verify that the rear wheels will not turn. If the rear wheels turn, adjust the parking brake cable as necessary.
- Release the parking brake and remove the brake drum.
- If the brake shoe clearance is not correct, adjust the brake shoes until the clearance is correct.
- Reinstall the brake drum, replace the wheel(s), and safely lower the vehicle.
- Road-test the vehicle for proper brake operation.