- Remove the brake drum.
- Measure the wear of the brake lining at the place worn the most. The service limit for replacement is 0.039 in. (1.0mm).
- Replace the shoe and lining assembly is any located is less than the limit. Whenever the shoe and lining assembly is replaced, be sure to replace the left and right side assemblies as a set to prevent the car from pulling to one side when braking.
- If there is a big difference between the thicknesses of the shoe and lining assembly on the left and right sides, check the sliding condition of the wheel cylinder piston.
REMOVAL & INSTALLATION
- Raise vehicle and support safely.
- Remove the tire and wheel assembly.
- Remove the brake drum.
- Remove the front shoe-to-rear shoe spring.
- Remove the shoe-to-lever spring and remove the adjuster assembly.
- Remove the shoe hold-down clips and the brake shoes.
- Disconnect the parking brake cable from the rear shoes by spreading the horseshoe clip apart.
- Thoroughly clean and dry the backing plate. Ensure the backing plate bosses are smooth, so shoes won't bind.
- Lubricate backing plate bosses, anchor pin, and parking brake actuating mechanism with a lithium-based grease.
- Remove, clean and dry all remaining parts. Apply anti-seize to the star wheel threads and transfer all parts to the new shoes.
- Connect the parking brake arm to the appropriate brake shoe.
- Attach shoes to the backing plate and install all remaining hardware in the reverse order it was removed.
- Preadjust the shoes so the drum slides on with a light drag and install brake drum.
- Install a new wheel bearing self-locking nut and torque to 130 ft. lbs. (180 Nm).
- Install the wheel bearing dust cap and adjust the rear brake shoes.
- Raise and safely support the vehicle.
- Remove the rear wheels and drums.
- Remove the lever return spring.
- Remove the shoe-to-lever spring.
- Remove the adjuster lever.
- Remove the auto-adjuster assembly.
- Remove the retainer spring.
- Remove the brake shoe hold-down springs and spring cups.
- Remove the shoe-to-shoe spring.
- Remove the brake shoes.
- Disconnect the parking brake cable from the lever on the rear shoe.
- Remove the parking brake lever from the used shoe and install it on the new brake shoe. Make sure the wave washer is installed in the proper direction.
- Clean the backing plate and lightly apply brake grease to the six shoe support pads.
- Clean the adjuster assembly and apply brake grease to the threads; do not use more grease than necessary.
- Connect the parking brake cable to the lever on the rear shoe.
- Position the rear shoe on the backing plate and install the hold-down spring and pin.
- Position the front shoe on the backing plate and install the hold-down spring and pin.
- Position the adjuster assembly between the two shoes.
- Install the shoe-to-shoe spring.
- Install the retainer spring.
- Install the adjuster lever.
- Install the shoe-to-lever spring.
- Install the lever return spring.
- Adjust the brake shoes and install the drum.
- Install the wheel and tire assembly.
- Lower the vehicle to the floor.
The rear brakes are automatically adjusted while driving the vehicle. The brakes are also adjusted each time the parking brake is applied. Manual brake adjustment is only required after the brake shoes or hardware has been replaced, or the adjuster has been replaced.
- Remove the brake drum as described in this section.
- Remove any excessive dust and dirt present on the brakes using the appropriate methods.
- Using a brake adjustment gauge, measure the inside diameter of the brake drum.
- Adjust the brake shoes to the same diameter as the drum by placing the brake adjustment gauge on the shoes and turn the adjusting star wheel.
- Install the brake drum as described in this section.