Parking Brake System: Testing and Inspection

Parking Brake Inspection








1. Block the front wheels then raise the rear of the vehicle, and make sure it is securely supported. Remove the rear wheels.
2. Release the parking brake, and remove the rear caliper and rear brake disc/drum.





3. Check the parking brake linings (A) for cracking, glazing, wear, and contamination.
4. Measure the parking brake lining thickness (B). Measurement does not include brake shoe thickness.
Parking brake lining thickness:
Standard: 1.9 - 2.5 mm (0.075 - 0.098 inch)
Service limit: 1.0 mm (0.04 inch)
5. If the brake lining thickness is less than the service limit, replace all the parking brake shoes as a set.
6. Check the bearings in the hub unit for smooth operation.





7. Measure the inside diameter of the parking brake drum brake with inside vernier calipers.
8. If the inside diameter of the parking brake drum is more than the service limit, replace the rear brake disc/drum.
9. Check the parking brake drum for scoring, grooves, and cracks.