Drum Brake System: Testing and Inspection

REAR DRUM BRAKE





COMPONENT

INSPECTION
1. Inspect the inside of the brake drum for scratches and uneven or abnormal wear.
2. Repair minor damage or replace if damage is excessive.





3. Measure the inside diameter of the brake drum using Brake Drum Micrometer or equivalent.





4. The standard inner drum diameter is 7.87 inches (200 mm). The maximum diameter is 7.91 inch (201 mm).

CAUTION: Be sure to check the drum-to-shoe contact after repairing or replacing the brake drum.

5. Check the brake linings for peeling, cracks, or extremely uneven wear.
6. If the brake lining thickness is less than 0.04 inch (1.0 mm), replace the brake shoes.