When an overhaul is suggested, normally because of fluid leakage or sticky operation, investigate all possibilities before commencing the job. This is very easy since new wheel cylinders are available. Should it be decided to rebuild the wheel cylinder, make sure that there is a rebuild kit on-hand before attempting it and that the wheel cylinders are rebuilt in pairs. To take out the wheel cylinder, lift the rear of the car and place it firmly on jackstands and block the front wheels so that the car does not roll. Disassemble the shoe assembly of the brake and remove all dirt and foreign substance around the wheel cylinder. Break the
Brake Line with a flare-nut wrench without eliminating the mounting bolts and loosening the wheel cylinder by attaching the brake line, but ensure you keep the brake line plugged to avoid losing and contaminating fluids. To overhaul, take the bleeder screw, piston cups, pistons, boots, and piston assemblies out of the wheel cylinder body, wipe it with brake fluid, denatured alcohol, or brake system cleaner. Blow out the passages with compressed air and blow out excess fluid, inspect the cylinder bore corrosion and score lines. The crocus cloth is used to remove light corrosion and stains, however, in case the defects are not easily removable, or the bore is scored, the cylinder should be replaced. Apply brake fluid to lubricate the new piston cups and fit the parts of the brake cylinder, making sure that the lips on the piston cups are inwards-facing. To install it, the wheel cylinder is placed in place and the bolts installed, the brake line connected and the brake shoe assembly installed and then the brakes bled.