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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 >> Front 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 brake fluid level is midway between the maximum-full point and the minimum allowable level, no brake fluid needs to be removed from the reservoir before proceeding.
  3. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, remove brake 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. Fig 1: Compressing Brake Caliper Pistons
    GM1497134Courtesy of GENERAL MOTORS COMPANY
  6. Compress the brake caliper pistons.
    1. Install 2 large C-clamps over the top of the caliper housing and against the back of the outboard pad.
    2. Slowly tighten the C-clamps until the pistons are pushed completely into the caliper bores.
    3. Remove the C-clamps from the caliper.
    7. Fig 2: Brake Hose Fitting
    GM1497135Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Cap or plug the brake hose to prevent brake fluid loss and contamination.

  7. Clean all dirt and foreign material from the brake caliper.
  8. Remove the brake hose to caliper bolt.
    9. NOTE:

    Ensure the washers are not still attached to the brake hose or the brake caliper.

  9. Remove and discard the 2 copper brake hose gaskets.
  10. Remove the brake hose from the brake caliper.
    11. 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 install the brake caliper bolts. Use hand tools ONLY.
    • Install an open end wrench to hold the caliper guide pin in line with the brake caliper while removing or installing the brake caliper bolt. DO NOT allow the open end wrench to come in contact with the brake caliper. Allowing the open end wrench to come in contact with the brake caliper will cause a pulsation when the brakes are applied.
  11. Using an open end wrench to hold the guide pin, loosen the brake caliper bolts.
    12. Fig 4: Brake Caliper Bolt
    GM1479402Courtesy of GENERAL MOTORS COMPANY
  12. Remove the brake caliper bolts.
    13. Fig 5: Caliper Bracket
    GM1479403Courtesy of GENERAL MOTORS COMPANY
  13. Remove the brake caliper from the mounting bracket.
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