REMOVAL & INSTALLATION
See Figures 1 through 7
- Raise and safely support the vehicle.
- Remove the wheel and tire assembly.
A left-hand threaded locknut is used on the vehicles right rear wheel spindle. Turn this locknut clockwise to loosen.
- Remove the brake drum.
- Remove the brake shoes.
- Clean the dirt from the back of the wheel cylinder and fittings using a clean shop towel.
- Remove the bleeder screw to allow better access to the brake lines flare nut fitting.
- Unscrew the brake line fitting with a flare nut wrench. Slide the nut away from the wheel cylinder.
- Loosen the two wheel cylinder retaining bolts and remove the wheel cylinder from the backing plate.
- Plug the brake line to prevent contamination.
- Position the wheel cylinder onto the backing plate.
and hand start the brake line flare nut.
- Install the 2 retaining bolts and tighten them to 7-9 ft. lbs. (10-13 Nm).
- Connect the brake line and tighten the fitting to 10-15 ft. lbs. (13-21 Nm).
- Install the rear brake shoes.
- Install the brake drum and adjust the wheel bearing preload. Insert a new cotter pin.
- Install the wheel and tire assembly.
- Lower the vehicle.
- Bleed the brake system and adjust the rear brakes as required.
- Check the brake system for leaks and proper operation.
See Figures 8 through 17
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 new boots into the counterbores by hand. Do not lubricate the boots.
- Install the wheel cylinder.