REMOVAL & INSTALLATION
See Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11
- Raise and safely support the vehicle securely on jackstands.
- Remove the wheels.
- Disconnect the rubber brake hose from the tubing at the frame mount. Check the rubber hose for cracks or chafed spots.
If the piston is to be removed from the caliper, leave the brake hose connected to the caliper.
- Plug the brake line to prevent loss of fluid.
- Remove the retaining screw, clip and anti-rattle spring that attach the caliper to the adapter.
- Carefully slide the caliper out and away from the disc. A small prybar may be necessary to free the caliper from the adapter.
- If the old brake pads are being used, matchmark them for installation reference.
- Position the outboard shoe in the caliper. The shoe should not rattle in the caliper. If it does, or if any movement is obvious, bend the shoe tabs over the caliper to tighten the fit.
- Install the inboard shoe.
- Lubricate the slide surfaces of the caliper with high temperature grease.
- Slide the caliper into position on the adapter and over the rotor.
- Install the anti-rattle springs and retaining clips and tighten the retainer bolts to 20 ft. lbs. (2 Nm).
- Connect the rubber brake hose to the tubing at the frame mount and tighten to 10 ft. lbs. (47 Nm).
- Refill the brake master cylinder reservoir with clean, fresh brake fluid, meeting DOT 3 or DOT 4 specifications.
- Properly bleed the brake system.
- Install the wheels.
Failure to tighten the lug nuts to the proper torque in a star pattern may result in damage to the brake rotor.
- Lower the vehicle.
See Figures 12, 13, 14, 15, 16, 17, 18 and 19
Some vehicles may be equipped dual piston calipers. The procedure to overhaul the caliper is essentially the same with the exception of multiple pistons, O-rings and dust boots.
- Remove the caliper from the vehicle and place on a clean workbench.
Depending upon the vehicle, there are two different ways to remove the piston from the caliper. Refer to the brake pad replacement procedure to make sure you have the correct procedure for your vehicle.
The first method is as follows:
- Stuff a shop towel or a block of wood into the caliper to catch the piston.
- Remove the caliper piston using compressed air applied into the caliper inlet hole. Inspect the piston for scoring, nicks, corrosion and/or worn or damaged chrome plating. The piston must be replaced if any of these conditions are found.
- For the second method, you must rotate the piston to retract it from the caliper.
- If equipped, remove the anti-rattle clip.
- Use a prybar to remove the caliper boot, being careful not to scratch the housing bore.
- Remove the piston seals from the groove in the caliper bore.
- Carefully loosen the brake bleeder valve cap and valve from the caliper housing.
- Inspect the caliper bores, pistons and mounting threads for scoring or excessive wear.
- Use crocus cloth to polish out light corrosion from the piston and bore.
- Clean all parts with denatured alcohol and dry with compressed air.
- Lubricate and install the bleeder valve and cap.
- Install the new seals into the caliper bore grooves, making sure they are not twisted.
- Lubricate the piston bore.
- Install the pistons and boots into the bores of the calipers and push to the bottom of the bores.
- Use a suitable driving tool to seat the boots in the housing.
- Install the caliper in the vehicle.
- Install the wheel and tire assembly, then carefully lower the vehicle.
- Properly bleed the brake system.