Drum Brake System: Testing and Inspection

1. Inspect components for damage or unusual wear. Replace as necessary.
2. Inspect backing plate attaching bolts, and ensure they are tight.
3. Inspect wheel cylinders. Excessive fluid indicates cup leakage and need for wheel cylinder replacement. A slight amount of fluid is always present and is considered normal, acting as a lubricant for the cylinder pistons.
4. Check adjuster screw operation. If satisfactory, lightly lubricate adjusting screw and washer with suitable brake lube. If operation is unsatisfactory, replace.
5. Using fine emery cloth or other suitable abrasive, clean rust and dirt from shoe contact surfaces on backing plate.