The rear brakes do not require manual adjustment. Adjust the shoes by sharply applying the brake pedal several times while driving the vehicle alternately forwards and backwards. Check the brake operation by making several stops while driving forward. The self-adjusting mechanism will sufficiently adjust the rear brake shoes without any manual tightening at the brake shoe adjuster. If the rear brake shoes are manually adjusted, the additional action of the brake shoe adjuster can cause the brakes to become over-tightened and result in binding or overheated rear brakes.
Inspect the brake shoes for wear using a ruler or Vernier caliper. The brake lining thickness should be 0.059 - 0.232 inch (1.5 - 5.9mm). If the lining is thinner than specification or there is evidence of the lining being contaminated by brake fluid, repair the leak and replace all brake shoe assemblies (a complete axle set). In addition to the shoes inspect all springs and brake shoe hardware for wear and replace as necessary.
Removal & Installation
- Loosen the lug nuts on the rear wheels.
- Block the front wheels, then raise and safely support the rear of the vehicle securely on jackstands.
- Remove the rear wheels.
- Remove the brake drum.
- Using a pair of side cutters, pull the parking brake cable return spring back on the cable. Disconnect the parking brake rear cable from the parking brake lever.
- Remove the two brake shoe hold-down springs and hold-down pins.
- Using a pair of needlenose pliers, remove the upper retracting spring and brake adjusting lever.
- Using a pair of needlenose pliers, remove the lower retracting spring.
- Remove the brake adjuster screw.
- Remove the rear brake shoes and linings from the backing plate.
Remove the parking brake lever clip and washer from the secondary brake shoe and remove the lever from the shoe.
- Clean the backing plate, springs, hold-down assemblies, and adjusters using a commercially available brake cleaning fluid.
- Apply a light coating of silicone dielectric compound, such as Ford D7AZ-19A331-A or equivalent silicone grease, at the points where the brake shoes contact the backing plate.
- Apply a thin coat of lubricant to the adjuster screw threads and socket end of the adjusting screw. Install the stainless steel washer over the socket end of the adjusting screw and install the socket. Turn the adjusting screw into the adjusting pivot nut to the limit of the threads and then back off 1 / 2 turn.
- Assemble the parking brake lever to the secondary (rear) shoe by installing the spring washer and a new horse shoe retaining clip. Crimp the clip until it retains the lever to the shoe securely.
- Position the secondary (rear) shoe on the backing plate and install the brake shoe hold-down spring and pin.
- Position the primary (front) shoe on the backing plate and install the brake shoe hold-down spring and pin.
- Attach the parking brake cable to the parking brake lever.
- Attach the lower retracting spring to the rear brake shoes.
- Install the adjuster in the slots on the rear brake shoes. The wider slot on the socket must fit in the slot on the primary brake shoe. The slot on the adjuster nut end must fit into the slots in the secondary brake shoe and parking brake lever.
- Install the brake adjusting lever on the pin of the primary brake shoe.
- Install the upper retracting spring in the slot on the secondary shoe and in the slot on the adjusting lever. The brake shoe adjusting lever should contact the brake adjuster.
- Install the brake drum.
- Install the wheel and tighten the lug nuts to 72 - 87 ft. lbs. (98 - 118 Nm).
- Lower the vehicle.
- Adjust the rear brake shoes by sharply applying the brakes several times while driving the vehicle alternately forwards and backwards. Check the brake operation by making several stops while driving forward.