Brake Rotor Surface and Wear Inspection
Brake Rotor Surface and Wear InspectionTools Required:
- J 26900- 1 Combimike Micrometer
1. Reposition and support the caliper and the brake pads.
2. Clean the brake pad lining contact surfaces of the brake rotor with denatured alcohol or an equivalent brake cleaner.
3. Inspect the braking surfaces of the brake rotor for the following braking surface conditions:
- Heavy rust and/or pitting
Use an abrasive disc in order to remove light surface rust.
Refinish the rotor in order to remove heavy surface rust.
- Cracks and/or heat spots
- Excessive blueing discoloration
4. If the braking surfaces of the brake rotor exhibits one or more of the braking surface conditions, refinish or replace the brake rotor.
5. Use the J26900-1, or the equivalent micrometer, in order to measure any grooves on the rotor braking surface.
6. Compare the groove depth to the following specification:
Specification
The maximum groove depth is ......0.38 mm (0.015 inch).
7. If the groove depth exceeds the specification, or if an excessive amount of scoring is present, refinish or replace the brake rotor.