- Remove loose rust and other foreign matter from the outside surfaces of the drum with a wire brush.
- Check the casting itself for cracks or other obvious damage. Bluing indicates overheating. The cause should be determined.
- Check the lug stud holes for ovality.
- Clean the inside of the drum. Check for scoring or grooves. Any imperfections must be removed.
- Check the inside diameter of the rotor. Maximum allowable inside diameter is stamped on the drum. If machining is needed to clean up the contact surface, the measurement must be taken afterwards. Replace the drum if it exceeds the specification.
- Clean up the brake lining contact area with medium sandpaper. Be sure that you don't leave a directional pattern on the contact surface.
Perform a final cleaning of the contact area with a purpose-made commercial brake cleaning solvent to remove fingerprints and oily residue.
Removal & Installation
- Before servicing the vehicle, please familiarize yourself with safety procedures.
- Remove the axle shaft nuts, washers and cones. If the cones do not readily release, rap the axle shaft sharply in the center.
- Remove the axle shaft.
- Remove the outer hub nut.
- Straighten the lockwasher tab and remove it along with the inner nut and bearing.
- Carefully remove the drum.
- Position the drum on the axle housing.
- Install the bearing and inner nut. While rotating the wheel and tire, tighten the adjusting nut until a slight drag is felt.
- Back off the adjusting nut 1 / 6 turn so that the wheel rotates freely without excessive end-play.
- Install the lockrings and nut. Place a new gasket on the hub and install the axle shaft, cones, lockwashers and nuts.
- Install the wheel and tire.
- Road-test the vehicle.