Front

Disassembly Procedure





Important:
^ Replace all the components included in the repair kits used to service this brake caliper.
^ Lubricate the rubber parts with clean brake fluid to make assembly easier.
^ If any hydraulic component is removed or disconnected, it may be necessary to bleed all or part of the brake system.
^ Replace the brake pads in axle sets only. The torque values specified are for dry, unlubricated fasteners.
^ Perform the service operations on a clean bench, free from all mineral oil materials.





Caution: Do not place your fingers in front of the piston in order to catch or protect the piston while applying compressed air. This could result in serious injury.

1. Remove the brake caliper from the vehicle. Refer to Brake Caliper Replacement (Front).
2. Remove the pistons by directing compressed air into the brake hose inlet fitting port of the brake caliper housing.





3. Remove the piston boots (2).
4. Remove the piston seals (1).





5. Remove the brake caliper bleed screw cap.
6. Remove the brake caliper bleed screw (1).
7. Inspect the brake caliper bores and piston seal grooves for scoring and corrosion. If badly scored or corroded around the piston seal area, replace the brake caliper housing.





8. Inspect the brake caliper mounting bracket guide surfaces for corrosion and wear. Remove and replace the brake caliper mounting bracket if necessary.
9. Clean all the residue from the brake pad guiding surfaces on the brake caliper housing and the brake caliper mounting bracket.
10. Clean all the parts not included in the repair kit with denatured alcohol.
11. Dry all the parts with filtered unlubricated compressed air.
12. Blow out all passages in the brake caliper housing and the brake caliper bleeder valve.

Assembly Procedure

Notice: Refer to Fastener Notice in Service Precautions.





1. Install the brake caliper bleed screw (1).
^ Tighten the brake caliper bleed screw to 12 Nm (106 lb in).
2. Install the brake caliper bleed screw cap.





3. Lubricate the new piston seals and the brake caliper bore seal grooves with brake fluid.
4. Install new seals (1) into the brake caliper bore seal grooves.
5. Make sure the seals are not twisted.
6. Lubricate the brake caliper bores and the pistons with brake fluid.
7. Install the boot (2) and piston (3).
7.1. Install the boot over the end of the piston so that the fold will face toward the brake caliper housing piston bore opening.
7.2. Seat the boot into the brake caliper bore groove and slide the piston into the brake caliper bore.
7.3. Push down the piston to the bottom of the brake caliper bore.
7.4. Make sure the boot is properly seated into the piston groove and into the groove in the brake caliper bore.
7.5. Repeat Steps 5 and 6 for the remaining piston.
8. Install the brake caliper to the vehicle. Refer to Brake Caliper Replacement (Front).