REMOVAL & INSTALLATION
- Elevate and safely support the vehicle. If only the rear wheels are elevated, block the front wheels with chocks. Once the vehicle is firmly on stands, release the parking brake.
- Remove the rear wheel.
- Make an index mark showing the relationship between one wheel lug and one hole in the drum. This will allow the drum to be reinstalled in its original position.
- On sedans, remove the grease cap, cotter pin, lock cap, nut, washer and wheel bearing.
Tap the drum with a rubber mallet or wooden hammer handle. Remove the brake drum. It will not come off if the parking brake is applied. If the brake drum cannot be removed easily, follow these procedures:
- Insert a screwdriver through the hole in the backing plate and hold the adjusting lever away from the star wheel.
- Using a brake adjusting tool, turn the star wheel to reduce the tension (increase the clearance) on the brake shoes.
- Before reinstalling the drum, perform the measurements and adjustments explained in this section.
- Install the drum, observing the matchmarks made earlier. Keep the drum straight while installing it; if it goes on crooked it can damage the brake shoes.
- On sedans, install the adjust the wheel bearing(s). Refer to the procedures in this repair guide.
- Install the wheel.
- Lower the car to the ground.
- Test drive the car at safe speeds and in a safe location to check the pedal feel and brake function. Adjust as necessary.
See Figure 1
For reasons of safety and reliability, we recommend that if one drum requires replacement, both drums, along with new shoes, should be replaced as a set.
- Clean the drum.
- Inspect the drum for scoring, cracks, grooves and out-of-roundness. Measure it to determine maximum diameter. A cracked drum must be replaced; do not attempt to weld a drum.
- Light scoring may be removed by dressing the drum with fine emery cloth. If brake linings are replaced, always resurface a grooved drum.
- Heavy scoring will require the use of a brake drum lathe to turn the drum.
During manufacture, weights are used to balance brake drums. These weights must not be removed. After a drum is refinished, or if there are vibration problems not traceable to wheel balance, the brake drums should be checked for balance. If the drum is out of balance, it must be replaced.