Diagnostic Starting Point - Drum Brakes
Begin the drum brake system diagnosis with Diagnostic Starting Point - Hydraulic Brakes . The use of the Diagnostic Starting Point leads to the identification of the correct procedure for diagnosing the system and where the procedure is located.
Drum Brake Adjusting Hardware Inspection
- Inspect the drum brake adjusting hardware for the following: Excessive corrosion Damaged or broken adjuster spring Damaged or broken adjuster lever Damaged or broken adjuster star wheel and or adjuster thread
- If components are found to be damaged, replace them.
Brake Shoe Inspection
Inspect the linings every 9 650 km (6,000 mi) and any time the wheels are removed (tire rotation, etc.). Inspect the lining for wear by removing the plug and using the inspection hole. Replace the shoe and lining assemblies when the thickness of any lining is worn within 0.72 mm (0.030 in) of the shoe. Replace riveted shoe and lining assemblies when the lining is worn to within 0.76 mm (0.030 in) of any rivet head. Always replace shoe and lining assemblies as a complete axle set.