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 1 wheel lug and 1 hole in the drum. This will allow the drum to be reinstalled in its original position.
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:
- Insert a screwdriver through the hole in the backing plate and hold the adjusting lever away from the star wheel.
- Using another screw driver or 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 the Adjustments section earlier in this Section.
- Reinstall 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.
- 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.
- 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. This can be done on most off-vehicle balancers; a bubble balancer is particularly handy for this check. If the drum is out of balance, it must be replaced.