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Special Conditions Procedure

  1. If the vacuum continues to drop, remove the pressure and return hose from the pump.
  2. Install the plugs (1 and 2) supplied with J 45727 into the pressure and return port.
    3. Fig 1: Installing Plugs
    G01956322Courtesy of GENERAL MOTORS CORP.
  3. Attach J45727 (2) to J 35555 (1) or equivalent.
    4. Fig 2: Attaching J45727 To J35555
    G01956323Courtesy of GENERAL MOTORS CORP.
  4. Place J45727 (2) on the pump reservoir filler neck.
  5. Apply a vacuum of 20 Hg maximum.
  6. If the vacuum drops again, repair or replace the pump. If the vacuum holds steady, continue to check the other parts of the steering system.
    NOTE: Fluid must be free from bubbles. Be aware of periodic bubbles that indicate a loose connection or pressure hose.
    NOTE: Fluid must be free from discoloration.
  7. Observe the fluid.
  8. If condition persists, replace the following parts:
    • The return hose clamps
    • The return hose O-rings
    • The pressure hose O-rings
    • The gear cylinder line O-rings
    • The reservoir to pump O-ring
  9. Repeat the bleed procedure from the beginning.
  10. Drive vehicle approximately 16 kilometers (10 miles) to warm system to operating temperature. Evaluate vehicle on a smooth flat surface.
  11. To check for noise problems, verify the following items:
    • There is a smooth power assist.
    • The vehicle operates quietly.
    • The pump maintains the proper fluid level.
    • There is no leaking in the steering system.
    • The fluid is free of foam or discoloration.
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