Brake Shoe: Testing and Inspection

Rear Drum Brakes Components:

WARNING:
- Never use an air hose or dry brush to clean brake assemblies.
- Use an OSHA approved vacuum cleaner to avoid breathing brake dust.
- Contaminated brake linings or drums reduce stopping ability.
- Block the front wheels before jacking up the rear of the vehicle.

NOTE:
- Block the front wheels, loosen the rear wheel nuts slightly, support the rear of vehicle on safety stands, then remove the rear wheels.
- Release the parking brake, and remove the rear brake drum.

Wheel Cylinder & Linings:

- Measure the brake lining thickness.

Specs:
Brake Lining Thickness*
Standard 4.0 mm (0.157 in)
Service Limit 2.0 mm (0.08 in)

- If the brake lining thickness is less than service limit, replace the brake shoes as a set.
- Check the bearings in the hub unit for smooth operation.

* Measurement does not include brake shoe thickness.