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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 477 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> Brake Pipe and Hose Inspection

Brake Pipe and Hose Inspection

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WARNING:

Refer to Brake Fluid Irritant Warning .

  1. Visually inspect all of the brake pipes for the following conditions:
    • Kinks, improper routing, missing or damaged retainers
    • Leaking fittings, excessive corrosion
  2. If any of the brake pipes exhibited any of the conditions listed, then the identified pipe, or pipes, require replacement.
  3. Ensure that the vehicle axles are properly supported at ride height in order to maintain the proper relationship of the flexible brake hoses to the chassis.
  4. Fig 1: Identifying Flexible Brake Hose Failure Conditions
    GM681071Courtesy of GENERAL MOTORS COMPANY
  5. Visually inspect all of the flexible brake hoses for the following conditions:
    • Kinks (1), improper routing, twists, chafing, missing or damaged retainers
    • Leaking connections, cracking, dry-rot, blisters, bulges
  6. If any of the flexible brake hoses exhibited any of the conditions listed, then the identified flexible brake hose, or hoses require replacement.
  7. Squeeze the flexible brake hoses with firm finger pressure to check for soft spots (2), indicating an internal restriction. Check the entire length of each flexible brake hose.
  8. If any of the flexible brake hoses were found to have soft spots (2), then the identified flexible brake hose, or hoses require replacement.