Brake Shoe: Testing and Inspection

BRAKE LINING THICKNESS CHECK





1. Remove the brake drum.
2. Measure the wear of the brake lining at the place worn the most.
Limit: 1.0 mm (0.039 inch)
Replace the shoe and lining assembly if any location of the brake lining thickness is less than the limit.

Caution:
1. Whenever the shoe and lining assembly is replaced, replace both RH and LH assemblies as a set to prevent the car from pulling to one side when braking.
2. If there is a significant difference in the thicknesses of the shoe and lining assemblies on the left and right sides, check the sliding condition of the wheel cylinder piston.

BRAKE DRUM INSIDE DIAMETER CHECK





1. Remove the brake drum.
2. Measure the inside diameter of the hub and drum at two or more locations.
Limit: 231 mm (9.1 inch)
3. Replace brake drums, shoe and lining assemblies when wear exceeds the limit value or is badly out of balance.

BRAKE LINING AND BRAKE DRUM CONTACT CHECK





1. Remove the brake drum.
2. Remove the shoe and lining assembly.
3. Chalk inner surface of brake drum and rub with shoe and lining assembly.
4. Replace shoe and lining assembly or brake drum if very irregular contact area is observed.

NOTE: Clean off chalk after check.