Brake pads may contain asbestos, which has been determined to be a cancer causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling any dust from any brake surface! When cleaning brake surfaces, use a commercially available brake cleaning fluid.
REMOVAL & INSTALLATION
See Figure 1
- Raise and safely support the vehicle. Remove the rear wheel and tire assembly.
- Remove the brake fitting retaining bolt from the caliper and disconnect the flexible brake hose from the caliper. Plug the hose and the caliper fitting.
- Remove the caliper locating pins. Lift the caliper off the rotor and anchor plate using a rotating motion.
Do not pry directly against the plastic piston or damage to the piston will occur.
- Position the caliper assembly above the rotor with the anti-rattle spring located on the lower adapter support arm. Install the caliper over the rotor with a rotating motion. Make sure the inner pad is properly positioned.
- Install the caliper locating pins and start them in the threads by hand. Tighten them to 19-26 ft. lbs. (26-35 Nm).
- Install the brake hose on the caliper with a new gasket on each side of the fitting outlet. Insert the retaining bolt and tighten to 30-40 ft. lbs. (40-54 Nm).
- Bleed the brake system, install the wheel and tire assembly and lower the vehicle.
- Pump the brake pedal prior to moving the vehicle to position the linings.
- Road test the vehicle.
See Figures 2, 3, 4, 5 and 6Disassembly
- Remove the rear disc brake caliper from the vehicle and place it on a bench.
- Remove the brake pads from the caliper.
- Place shop towels between the caliper piston and the caliper bridge to cushion the piston's impact. Using an air nozzle, apply air pressure to the caliper fluid port to blow the piston out of its bore. If the piston is seized and cannot be forced from the caliper, tap lightly around the piston while applying air pressure.
Apply only enough air pressure to ease the piston out of the caliper. Excessive pressure can force the piston out of the caliper bore with enough force to cause personal injury. Never attempt to catch the piston by hand as it comes out of the bore.
Do not use a screwdriver or prybar to pry the piston out of the bore; damage to the piston may result.
- With the caliper piston removed, use a magnet to lift out the anti-rotation pin.
- With the anti-rotation pin removed, use a suitable hex wrench to bottom the thrust screw in the caliper.
- Remove the dust boot from the caliper.
- Remove and discard the rubber piston seal from the caliper bore.
- Clean all metal parts with isopropyl alcohol, then clean out and dry the grooves and passageways with compressed air. Make sure the caliper bore and component parts are thoroughly clean.
- Check the caliper bore and piston for damage or excessive wear. Replace the piston if it is pitted or scored. The piston should also be replaced if it worn or shows excessive wear marks.
- Apply a film of clean brake fluid to a new caliper piston seal and install it in the caliper bore. Make sure the seal is firmly seated in the groove and not twisted.
- Install a new dust boot by setting the flange squarely in the outer groove of the caliper bore.
- Coat the piston with brake fluid. Using a C-clamp and a wood block, install the piston into the caliper bore. Make sure the piston is not cocked. Spread the dust boot over the piston as it is installed.
Never apply the C-clamp directly to the caliper piston; damage to the piston may result.
- Seat the dust boot in the piston groove. Make sure the dust boot is tight in the boot groove on the piston.
- Install the disc brake pads and install the caliper on the vehicle.