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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 481 (Disc Brake System) >> Repair Instructions >> Rear Brake Caliper Replacement (1500 Series) >> Removal Procedure

Removal Procedure

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  1. Inspect the fluid level in the brake master cylinder reservoir.
  2. If the fluid level is midway between the maximum-full point and the minimum allowable level, no fluid needs to be removed from the reservoir before proceeding.
  3. If the fluid level is higher than midway between the maximum-full point and the minimum allowable level, remove fluid to the midway point before proceeding.
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  6. Clean all dirt and foreign material from the brake hose fitting.
    7. Fig 1: Compressing Brake Caliper Piston
    GM1497136Courtesy of GENERAL MOTORS COMPANY
  7. Compress the caliper piston.
    1. Install a large C-clamp over the top of the caliper housing and against the back of the outboard pad.
    2. Slowly tighten the C-clamp until the piston is pushed completely into the caliper bore.
    3. Remove the C-clamp from the caliper.
    8. Fig 2: Brake Hose Fitting
    GM1497137Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Cap or plug the brake pipe to prevent brake fluid leakage and contamination of the brake system.

  8. Remove the brake hose to caliper bolt. Position the brake hose to the side.
    9. NOTE:
    • Ensure that the copper gaskets are not attached to the brake caliper or the brake hose.
    • DO NOT re-use the copper gaskets, replace with NEW.
  9. Remove and discard the 2 copper brake hose gaskets.
    10. Fig 3: Using Open End Wrench To Loosen Brake Caliper Guide Pin Bolt
    GM1697372Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • DO NOT use any air tools to remove or tighten the guide pin bolts. Use hand tools only.
    • Install an open end wrench to the guide pin and hold it in line with the caliper while removing or installing the caliper bolts. DO NOT allow the wrench to come in contact with the brake caliper. Allowing the wrench to come in contact with the brake caliper will cause a pulsation when the brake is applied.
  10. Using an open end wrench to back up the caliper guide pin, remove the guide pin bolt.
    11. Fig 4: Caliper & Caliper Bracket
    GM1497139Courtesy of GENERAL MOTORS COMPANY
  11. Remove the brake caliper from the mounting bracket.
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