When servicing wheel brake parts, do not create dust by cleaning with a dry brush or with compressed air. Asbestos fibers can become airborne if dust is created during servicing. Breathing dust containing asbestos fibers can cause serious bodily harm. To clean away asbestos from brake surfaces, use an OSHA-approved washer. Follow manufacturer's instructions when using the washer.
Use the following instructions to service the brake shoes.
- After removing the retaining devices that hold the drum to the axle flange or hub, the drum can be removed for servicing.
- If the brake drum is rusted or corroded to the axle flange and cannot be removed, lightly tap the axle flange to the drum mounting surface with a plastic mallet.
- Remember that if the drum is worn, the brake shoe adjustment has to be backed off for the drums to clear the brake shoes.
- Do not force the drum or distort it. Do not allow the drum to drop.
- If the brake shoes have expanded too tightly against the drum or have cut into the friction surface of the drum brake, the drums might be too tight for removal. In such a case, the shoes must be adjusted inward before the brake drum is removed.
- On most cars with self-adjusting mechanisms, reach through the adjusting slot with a thin screwdriver (or similar tool) and carefully push the self-adjusting lever away from the star wheel a maximum of 1/16 inch (1.5 mm).
Backing off the self-adjusters in order to remove the drum brake.
- While holding the lever back, insert a brake adjusting tool into the slot and turn the star wheel in the proper direction until the brake drum can be removed.