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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 Brake Rotor Replacement (1500 Series) >> Installation Procedure

Installation Procedure

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    IMPORTANT: Whenever the brake rotor has been separated from the hub/axle flange, any rust or contaminants should be cleaned from the hub/axle flange and the brake rotor mating surfaces. Failure to do this may result in excessive assembled lateral runout (LRO) of the brake rotor, which could lead to brake pulsation.
  1. Using the J 42450-A  , clean the rust and contaminants from the mating surface of the hub flange. See Special Tools .
  2. Using the J 41013  , clean all rust and contaminants from the inside diameter of the hat section of the brake rotor to prevent any foreign material from getting between the brake rotor and the hub flange. See Special Tools .
    3. Fig 1: View of Brake Rotor
    GM1708934Courtesy of GENERAL MOTORS CORP.
  3. Align the rotor to its original position on the hub, if applicable, and install the rotor.
  4. If the rotor was removed and installed as part of a brake system repair, measure the assembled lateral runout (LRO) of the rotor to ensure optimum performance of the disc brakes. Refer to Brake Rotor Assembled Lateral Runout Measurement .
  5. If the rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications. Refer to Brake Rotor Assembled Lateral Runout Correction .
    6. Fig 2: View Of Brake Caliper & Bracket Assembly
    GM1708847Courtesy of GENERAL MOTORS CORP.
  6. Install the caliper and caliper bracket assembly.
  7. Perform the following procedure before installing the brake caliper bracket mounting bolts:
    1. Remove all traces of the original adhesive patch from the threads of the bolts.
    2. Clean the threads of the bolts with denatured alcohol or equivalent and allow to dry.
    3. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488) to the threads of the bolts.
    8. NOTE: Refer to Fastener Notice .
  8. Install the brake caliper bracket mounting bolts.

    Tighten:  Tighten the bolts to 165 N.m (122 lb ft).

  9. Adjust the park brake. Refer to Park Brake Adjustment .
  10. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  11. Lower the vehicle. Refer to Lifting and Jacking the Vehicle .
  12. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of its travel distance.
  13. Slowly release the brake pedal.
  14. Wait 15 seconds, then repeat steps 12-13 until a firm pedal is obtained to properly seat the caliper pistons and pads.
  15. Fill the master cylinder reservoir to the proper level with clean brake fluid, if necessary. Refer to Master Cylinder Reservoir Filling (JD9, JH6) or Master Cylinder Reservoir Filling (Two-mode Hybrid) .
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