See Figures 1 and 2
See Figure 3
Inspect the brake shoes for wear using a ruler or Vernier caliper. Compare measurements to the brake specifications chart. If the lining is thinner than specification or there is evidence of the lining being contaminated by brake fluid or oil, 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
See Figures 4 through 20
When servicing drum brakes, only dissemble and assemble one side at a time, leaving the remaining side intact for reference.
- Raise and safely support the vehicle.
- Remove the rear wheel and tire assembly.
- Remove the brake drum retainers, if equipped.
- Grasp the brake drum and remove.
If the drum will not slide off with light force, then the brake shoes will need to be backed off:
- Remove the rubber plug on the backing plate and insert a screwdriver or small brake adjusting tool into the slot to contact the brake strut and quadrant.
- A forward motion of the screwdriver will separate the quadrant from the knurled wheel and allow the brake shoes to retract.
- Remove the brake drum.
- Remove the brake shoe hold down springs and the brake shoe hold down pins.
- Remove the brake shoe retracting springs.
- Disengage the parking brake cable and conduit from the parking brake lever.
- Remove the brake shoes.
- Disengage the rear brake strut and quadrant from the rear brake shoe.
- Remove the parking brake rear cable and conduit from the parking brake cable anchor on the trailing brake shoe.
- Lubricate the rear brake shoe contact points on the backing plate with an appropriate grease.
- Engage the parking brake rear cable and conduit into the parking brake cable anchor on the trailing brake shoe.
- Position the trailing brake shoe on the backing plate.
- Engage the rear brake strut and quadrant.
- Reinstall the parking brake rear spring.
- Reinstall the brake shoe hold down spring pin and the hold down spring.
- Insert the leading brake shoe into the slot on the rear brake strut and quadrant.
- Reinstall the brake shoe hold down pin and hold down spring.
- Reinstall the brake shoe retracting springs.
- Adjust the brake shoes by first measuring the inside drum diameter with an appropriate brake adjustment gauge.
- Insert a small screwdriver or similar tool into the knurled quadrant of the brake strut and quadrant to adjust the brake shoes to the same measurement of the brake drum by expanding the brake strut and quadrant.
- Trial fit the brake drum. The shoes should just contact the drum surface when properly adjusted.
- Make sure that the brake drum and brake shoes are clean of any oils or protective coatings.
- Reinstall the brake drum.
- Reinstall new drum retainers, if available.
- Reconnect the parking brake rear cable and conduit to the parking brake lever. It may be necessary to back off on the parking brake cable adjustment to allow for the new brake shoes.
- Reinstall the wheel and tire assembly. Torque the lug nuts to 62 ft. lbs. (85 Nm).
- Lower the vehicle.
- Work the parking brake control several times to complete the brake shoe adjustment and to check the parking brake adjustment as well.
- Pump the brake pedal several times to assure a good pedal.
- Road test the vehicle and check for proper brake system operation.
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.
- Insert a screwdriver into the knurled quadrant to release the brake shoes.
- Adjust the brake shoes to the same diameter as the drum by placing the brake adjustment gauge on the shoes and expanding the strut and quadrant.
- Install the brake drum as described in this section.