- Remove the caliper from the vehicle and place on a clean workbench.
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 prytool 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.
Removal & Installation
- Raise and safely support the vehicle. Remove the front wheel and tire assembly.
- Loosen the brake line fitting that connects the brake hose to the brake line at the frame bracket. Plug the brake line. Remove the retaining clip from the hose and bracket and disengage the hose from the bracket.
- Remove the hollow bolt attaching the brake hose to the caliper and remove the brake hose. Discard the sealing washers.
- Remove the caliper locating pins and remove the caliper. If removing both calipers, mark the right and left sides so they may be reinstalled correctly.
- Install the caliper over the rotor with the outer brake pad against the rotor's braking surface. This prevents pinching the piston boot between the inner brake pad and the piston.
- Lubricate the locating pins and the inside of the locating pin insulators with silicone dielectric grease. Install the caliper locating pins and thread them into the spindle/anchor plate assembly by hand.
- Tighten the caliper locating pins to 45-65 ft. lbs. (61-88 Nm).
- Install new sealing washers on each side of the brake hose fitting outlet and install the hollow bolt, through the hose fitting and into the caliper. Tighten the bolt to 30 ft. lbs. (41 Nm).
- Position the other end of the brake hose in the bracket and install the retaining clip. Make sure the hose is not twisted.
- Remove the plug from the brake line, connect the brake line to the brake hose and tighten the fitting nut to 10-18 ft. lbs. (13-24 Nm).
- Bleed the brake system, install the wheel and tire assembly and lower the vehicle.
- Apply the brake pedal several times before moving the vehicle, to position the brake pads.
- Road test the vehicle.