See Figures 1 and 2
Check that there are no cracks or chips in the braking surface. Excessive bluing indicates overheating and a replacement drum is needed. The drum can be machined to remove minor damage and to establish a rounded braking surface on a warped drum. Never exceed the maximum oversize of the drum when machining the braking surface. The maximum inside diameter is stamped on the rim of the drum.
REMOVAL & INSTALLATION
Chrysler Servo Type with Single Anchor
See Figures 3, 4, 5, 6, 7 and 8
- Raise and safely support the truck.
- Remove the plug from the brake adjustment access hole.
- Insert a thin bladed screwdriver through the adjusting hole and hold the adjusting lever away from the starwheel.
- Release the brake by prying down against the starwheel with a brake spoon.
- Remove the rear wheel and clips from the wheel studs. Remove the brake drum.
- Installation is the reverse of removal. Adjust the brakes.
Bendix Duo-Servo Type
See Figures 9, 10, 11 and 12
- Raise and safely support the vehicle.
- Remove the rear wheel and tire.
- 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.