Park Brake Shoe Inspection
- With the brake drum removed, clean the friction surface of the park brake shoes with denatured alcohol or an equivalent approved brake cleaner.
- Inspect the braking surface of the park brake shoes for the following braking surface conditions:
- Deep grooves or scoring.
- Cracks and/or heat spots.
- Excessive blueing discoloration.
- Excessive uneven wear.
- If the braking surface of the park brake shoes exhibits one or more of the braking surface conditions, the shoes require replacement. See PARK BRAKE SHOES under REMOVAL & INSTALLATION.
- Measure and record the thinnest point of each of the park brake shoe linings.
- Compare the thickness recorded to the park brake shoe minimum allowable thickness. See DISC BRAKE SPECIFICATIONS .
- If the park brake shoe thickness is less than the specification, the shoes require replacement. See PARK BRAKE SHOES under REMOVAL & INSTALLATION.