REMOVAL & INSTALLATION
See Figures 1 through 5
- Raise and safely support the vehicle. Remove the rear wheel and tire assembly.
- Clean the area around the wheel cylinder assembly inlet and pilot.
- Remove the brake drum assembly.
- Remove any brake components, necessary for access to the wheel cylinder.
- Disconnect and plug the inlet brake line.
- Remove the wheel cylinder-to-backing plate mounting screws and/or lockwashers, then remove the wheel cylinder assembly.
- Apply Loctite® Master Gasket, or equivalent to the wheel cylinder shoulder face that contact the backing plate.
- Position the wheel cylinder assembly to the backing plate, then install the retaining screws/bolts and/or lockwashers. Tighten the retainers to 106 inch lbs. (12 Nm).
- Unplug and connect the inlet brake line. Tighten the line nut to 12 ft. lbs. (17 Nm), using a flare nut wrench.
- Install any brake components that were removed for access to the wheel cylinder.
- Install the brake drum and the wheel and tire assembly.
- Carefully lower the vehicle, then properly bleed the brake system, as outlined in this section.
See Figures 6 through 16
Wheel cylinder overhaul kits may be available, but often at little or no savings over a reconditioned wheel cylinder. It often makes sense with these components to substitute a new or reconditioned part instead of attempting an overhaul.
If no replacement is available, or you would prefer to overhaul your wheel cylinders, the following procedure may be used. When rebuilding and installing wheel cylinders, avoid getting any contaminants into the system. Always use clean, new, high quality brake fluid. If dirty or improper fluid has been used, it will be necessary to drain the entire system, flush the system with proper brake fluid, replace all rubber components, then refill and bleed the system.
- Remove the wheel cylinder from the vehicle and place on a clean workbench.
- First remove and discard the old rubber boots, then withdraw the pistons. Piston cylinders are equipped with seals and a spring assembly, all located behind the pistons in the cylinder bore.
- Remove the remaining inner components, seals and spring assembly. Compressed air may be useful in removing these components. If no compressed air is available, be VERY careful not to score the wheel cylinder bore when removing parts from it. Discard all components for which replacements were supplied in the rebuild kit.
- Wash the cylinder and metal parts in denatured alcohol or clean brake fluid.
- Allow the parts to air dry or use compressed air. Do not use rags for cleaning, since lint will remain in the cylinder bore.
- Inspect the piston and replace it if it shows scratches.
- Lubricate the cylinder bore and seals using clean brake fluid.
- Position the spring assembly.
- Install the inner seals, then the pistons.
- Insert the new boots into the counterbores by hand. Do not lubricate the boots.
- Install the wheel cylinder.