Brake Shoe: Adjustments

Drum Brake Adjustment

Tools Required
^ J21177-A Drum to Brake Shoe Clearance Gauge

Important: The rear brakes must be adjusted manually after replacing the rear brake shoes.

1. Raise the vehicle. Refer to Vehicle Lifting.
2. Remove the brake drum.

Fig. 7 Measuring Brake Drum Inside Diameter:

3. Using the J21177-A measure the inside diameter of the brake drum.

Important: When performing the following service procedure, ensure that the J21177-A is level before taking the measurement.

Fig. 8 Adjusting Brake Shoes To Brake Drum Inside Diameter:

4. Using the J21177-A, adjust the brakes shoes until there is approximately 0.50 mm (0.020 lbs.) clearance between the rear brake shoes and the rear brake drum.





5. Using a punch and hammer, remove and discard the knockout plug in the backing plate (1) which is directly behind the star wheel adjuster.
6. Install the brake drum.





7. Insert a flat bladed screw driver (1) and move the adjuster lever away from the star wheel.
8. Using a brake adjusting tool, rotate the brake adjuster (2) until the amount of drag is equal on the left and right rear brake drums.
9. Apply the brake pedal two times in order to center the brake shoes on the locating pins.
10. Check the drums again for light drag. Adjust as necessary.
11. Install an adjusting hole cover in the backing plate.
12. Lower the vehicle. Refer to Vehicle Lifting.
13. Check the park brake adjustment.