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. When inspecting rear wheel cylinder, excessive fluid indicates leakage past the piston cups and a need to overhaul the rear wheel cylinder. A slight amount of fluid is normally 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.