Brake Drum: Testing and Inspection

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.