Front

DISASSEMBLY

NOTE: After service, pump brake pedal and obtain a firm pedal before moving the vehicle. Riding the brake pedal (common on left-foot application) must be avoided when driving the vehicle.

CAUTION: Do not use a screwdriver or any similar tool to pry piston out of bore. It will result in damage to piston. Cushion piston's impact against caliper when blowing it out of bore by placing shop towels between piston and caliper bridge. Use care because the piston can develop considerable force from pressure buildup.

1. Remove caliper assembly from caliper anchor bracket and front disc brake rotor as outlined under disc brake caliper removal. Do not use screwdriver or similar tool to pry piston back into cylinder bore. Use a C-clamp.
2. Disconnect the disc brake caliper from the hydraulic system, and blow the piston out by using air pressure. Cushion piston impact by inserting shop towel between piston and housing. Apply air pressure to the fluid port in the caliper with Air Nozzle Assembly TOOL-7000-DE or equivalent to remove caliper piston. If caliper piston is seized and cannot be forced from the disc brake caliper, tap lightly around the caliper piston while applying air pressure.
3. Remove the dust boot from the disc brake caliper.
4. Remove the rubber piston seal from the disc brake caliper and discard it.

ASSEMBLY
1. Be sure to clean foreign material from wheel cylinder piston surfaces and lubricate with brake fluid before inserting into disc brake caliper. Always install new seal and dust boot.
2. When installing caliper piston back into bore, use wood block or another flat stock, like an old pad lining assembly, between C-clamp and caliper piston. Do not apply C-clamp directly to caliper piston surface. This can result in damage to caliper piston. Be sure caliper piston is not cocked.
3. Make sure dust boot is tight in boot groove on caliper piston and in disc brake caliper.
4. Install disc brake caliper as outlined in Brake Caliper, Service and Repair.