Brake Drum: Testing and Inspection

Brake System Inspection

WARNING: Before beginning any service procedure, REFER to Safety Warnings . Failure to follow this instruction may result in serious personal injury.

Material(s)






Brake Drums

NOTE: It is generally not required to install new brake drums to address noise issues.

1. Inspect the brake drums and measure the brake drum diameter. Record the measurements. REFER to General Specifications .

- If the brake drum is cracked or otherwise damaged, install a new brake drum. REFER to Brake Drum .
- If the diameter measurement is more than the maximum specification, install a new brake drum. REFER to Brake Drum .
- Heavily scored brake drums, similar to that caused by shoes worn down to the backing plate, should be machined. In order to machine, drums must be below the maximum diameter specification.