Brake Drum: Service and Repair

Brake Drum And Hub And Bearing Assembly:

REMOVE
Further clearance can be obtained by backing off the brake automatic adjuster screw. Remove rubber plug from top of brake support plate. Rotate automatic adjuster screw assembly with an upward motion, using a medium size screwdriver.
1. Raise vehicle on jackstands or centered on a hoist.
2. Remove the rear wheel and tire assemblies from the vehicle.
3. Remove rear brake drum to hub retaining clips (if equipped).
4. Remove rear brake drum from rear hub/bearing assembly.
5. Inspect brake linings for wear, shoe alignment and contamination.

Maximum Brake Drum Diameter Identification:

Measure drum runout and diameter. If not to specification, reface drum. (Runout should not exceed 0.1524 mm or 0.006 inch). The diameter variation (oval shape) of the drum braking surface must not exceed either 0.0635 mm (0.0025 inch) in 30° or 0.0889 mm (0.0035 inch) in 360°. All brake drums are marked with the maximum allowable brake drum diameter.

INSTALL
1. Install rear brake drum assembly on rear hub and bearing assembly.
2. Install the wheel and tire assembly.
3. Tighten the wheel mounting stud nuts in proper sequence until all nuts are torqued to half specification. Then repeat the tightening sequence to the full specified torque of 109 - 150 Nm (80 - 110 ft. lbs.).