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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Disc Brakes >> Overhaul >> Brake Caliper >> Disassembly (Rear)

Disassembly (Rear)

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.
CAUTION: Avoid taking the following actions when you service wheel brake parts: DO NOT grind brake linings. DO NOT sand brake linings. DO NOT clean wheel brake parts with a dry brush or with compressed air. Some models or aftermarket brake parts may contain asbestos fibers which can become airborne in dust. Breathing dust with asbestos fibers may cause serious bodily harm. Use a water-dampened cloth in order to remove any dust on brake parts. Equipment is available commercially in order to perform this washing function. These wet methods prevent fibers from becoming airborne.
CAUTION: Brake fluid may irritate eyes and skin. In case of contact, take the following actions: Eye contact; rinse thoroughly with water. Skin contact; wash with soap and water. If ingested, consult a physician immediately.
  1. Remove the brake caliper from the vehicle. See BRAKE CALIPER  under REMOVAL & INSTALLATION. Place a thin piece of wood in front of the piston in order to prevent damage. Remove the piston by directing compressed air into the brake hose inlet fitting port of the brake caliper housing.
  2. Remove the piston boot. Remove the piston seal. Remove the brake caliper bleed screw cap. Remove the brake caliper bleed screw. See Figure. Inspect the brake caliper bore and the piston seal groove for scoring and corrosion. If you find excessive scoring or corrosion around the piston seal area, replace the brake caliper housing.
  3. Inspect the brake caliper mounting bracket guide surfaces for corrosion and wear. Remove and replace the brake caliper mounting bracket if needed. Clean all the residue from the brake pad guiding surfaces on the brake caliper housing and the brake caliper mounting bracket.
  4. Clean all the parts not included in the repair kit with denatured alcohol. Dry all the parts with filtered un-lubricated compressed air. Blow out all passages in the brake caliper housing and the brake caliper bleeder valve.
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