Park Brake Shoe Inspection

Park Brake Shoe Inspection
1. With the brake drum removed, clean the friction surface of the park brake shoes with denatured alcohol or an equivalent approved brake cleaner.
2. 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 bluing discoloration
^ Excessive uneven wear
3. If the braking surface of the park brake shoes exhibits one or more of the Braking Surface Conditions, the shoes require replacement.
4. Measure and record the thinnest point of each of the park brake shoe linings.
5. Compare the thickness recorded to the following specification:
Specification
Park brake shoe minimum allowable thickness 0.75 mm (0.030 inch).
6. If the park brake shoe thickness is less than the specification, the shoes require replacement.