1. Check the parking brake linings (A) for cracking, glazing, wear, and contamination. Measure the parking brake lining thickness (B). Measurement does not include brake shoe thickness.
   Parking brake lining thickness:
   | Standard: | 3.2 mm (0.13 in.)
   | Service limit: | 1.0 mm (0.04 in.)
If the parking brake lining thickness is less than the service limit, replace all the parking brake shoes as a set. Check the bearings in the hub unit for smooth operation. |