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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 333 (Hydraulic Brake System) >> Repair Instructions >> Master Cylinder Reservoir Replacement (Two-mode Hybrid) >> Removal Procedure

Removal Procedure

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WARNING:

Refer to Brake Fluid Irritant Warning .

    NOTE:

    The ignition must be in the OFF position, without pausing at ACCESSORY, and without applying the brake pedal to ensure the brake modulator and high pressure accumulator (HPA) pressure relief occurs. This process will take approximately 1 to 3 minutes.

  1. Turn the ignition to OFF, without pausing at ACCESSORY, and remove the ignition key.
  2. NOTE:

    During the pressure relief process, the fluid level in the master cylinder reservoir will rise. Do not remove the master cylinder reservoir cap during the pressure relief process.

  3. Wait approximately 1 to 3 minutes until the brake modulator and HPA pressure relief is complete.
  4. Remove the brake fluid from the brake master cylinder reservoir and discard into an approved container.
  5. Disconnect the brake fluid level sensor electrical connector.
  6. Fig 1: Reservoir Return Hose Quick Connect
    GM1892190Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the brake master cylinder reservoir return hose quick connect (1) and position the hose aside.
  8. Disconnect the brake master cylinder reservoir supply hose quick connect (2) and position the hose aside.
  9. Fig 2: Brake Master Cylinder Reservoir Pins
    GM1892191Courtesy of GENERAL MOTORS CORP.
  10. Remove the brake master cylinder reservoir pins (1).
  11. Fig 3: Master Cylinder Reservoir
    GM1892193Courtesy of GENERAL MOTORS CORP.
  12. Lift the master cylinder reservoir (1) straight up and remove the reservoir from the master cylinder.
  13. Fig 4: 3 Master Cylinder Reservoir Seals
    GM1892196Courtesy of GENERAL MOTORS CORP.
  14. Remove the 3 master cylinder reservoir seals (1).