See Figure 1
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
Servo With Single Anchor
- Jack and support the truck.
- Remove the plug from the brake adjustment access hole.
- Insert a thin bladed prytool through the adjusting hole and hold the adjusting lever away from the star wheel.
- Release the brake by prying down against the star wheel with a brake spoon.
- Remove the rear wheel and clips from the wheel studs. Remove the brake drum.
- If there is a little trouble releasing the drum from the axle, you may tap around on the drum in an even manner to loosen it.
- Install the drum and retaining clips.
- Install the wheel and tire assembly.
- Adjust the brakes.
- Raise and support the vehicle.
- Remove the rear wheel and tire.
- Remove the axle shaft nuts, washers and cones. If the cones do not readily release, tap 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 truck.