Brake Shoe: Testing and Inspection

NOTE: Replace any rear brake shoe and lining that is defective. Replace lining in axle sets only. Never replace just one shoe of a brake assembly. Replace both leading and trailing shoes on both sides.

PRE-CHECKS
- Check the brake backing plate for damage. If any damage is found, replace the brake backing plate as described.
- Prior to replacement of lining, check drum diameter to determine that brake drum diameter is within specification. If braking surface diameter exceeds specification, brake drum must be replaced.

OVERHEATING INSPECTION
- Check condition of rear brake shoes and linings, brake shoe retracting spring, brake shoe hold-down springs and brake drum for signs of overheating.
- If rear brake shoes and linings have a slight blue coloring, indicating overheating, brake shoe retracting spring and brake shoe hold-down springs should be replaced. Overheated springs lose their pull and could cause new rear brake shoe and lining to wear prematurely if they are not replaced.





INSPECT BRAKE LINING
- Inspect brake shoe and linings for peeling, cracking, or extremely uneven wear on the lining.
- Inspect the lining for normal wear. If the lining material is less than 8 mm (0.125 inch), the rear brake shoes and linings must be replaced.
- Replace any brake shoe and lining that has been contaminated with oil, grease or brake fluid.