Wheel Cylinder: Testing and Inspection

1. Rear wheel cylinders should not be disassembled unless they are leaking. Pull back each rear wheel cylinder dust boot as shown and inspect for leakage.
2. Excessive fluid at this point indicates leakage past the piston cups and a need for rear wheel cylinder overhaul. A slight amount of fluid is almost always present and acts as a lubricant for the pistons. If evidence of leakage is noted, the rear wheel cylinder should be disassembled, inspected and overhauled.
3. Inspect the rear wheel cylinder bore for scratches and pitting. If the rear wheel cylinder is pitted or has deep scratches, the rear wheel cylinder must be replaced.