1. Check the wheel cylinders for leakage.
2. Check the brake linings for cracking, glazing, wear or contamination.
3. Measure the brake lining thickness.
Brake Lining Thickness: Standard: 5 mm (0.197 in.) Service Limit; 2.0 mm (0.08 in.)
NOTE: Measurement does not include brake shoe thickness.
4. Check the bearings in the hub unit for smooth operation. If defective, refer section 18.
5. Measure inside diameter of the brake drum.
Drum Inside Diameter:
Standard 203.20-203.33 mm
(8.000-8.005 in.) Service Limit: 204 mm (8.03 in.)
6. Check the brake drum for scoring, grooving, cracks.