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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 213 (Disc Brake System) >> Repair Instructions >> Rear Disc Brake Pads 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. Fig 1: Compressing Brake Caliper Piston
    GM1497136Courtesy of GENERAL MOTORS CORP.
  6. Compress the brake 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.
    7. Fig 2: Using Open End Wrench To Loosen Brake Caliper Guide Pin Bolt
    GM1697372Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • DO NOT use any air tools to remove the guide pin 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 caliper guide pin 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 brake are applied.
  7. Using an open end wrench to hold the guide pin, loosen the guide pin bolt.
    8. NOTE: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.
    Fig 3: View Of Brake Components
    GM1699857Courtesy of GENERAL MOTORS CORP.
  8. Remove the guide pin bolt (1) from the brake caliper (2).
  9. Rotate the brake caliper (2) upward until it stops on the caliper mounting bracket (5) and support the caliper with heavy mechanics wire or equivalent.
    10. IMPORTANT:
    • If removing and installing the original brake pads and retaining springs, reference mark the position of the brake pads and retaining springs for proper installation.
    • DO NOT re-use the old brake pad retaining springs with new brake pads. Replace with NEW only.
  10. Remove the brake pads (3) and retaining springs (4) from the mounting bracket (5).
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