LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Power Rack & Pinion Steering System) >> Lubrication >> Hydraulic System Bleeding >> Excessive Vacuum Drop Diagnosis

Excessive Vacuum Drop Diagnosis

WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. If the vacuum continues to drop, remove the pressure and return hose from the pump. Install the plugs supplied with the Power Steering Bleeder Adaptor into the pressure and return port.
  2. Attach the Power Steering Bleeder Adapter to the Metal Mity vac or equivalent. Place the Power Steering Bleeder Adapter on or in the pump reservoir filler neck. Apply a vacuum of 68 kPa (20 in Hg) maximum. 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.
    3. NOTE: Fluid must be free from bubbles and foam. Be aware of periodic bubbles that indicate a loose connection or leaking O-ring seal in the return hose or the pressure hose. Fluid must be free from discoloration.
  3. Observe the fluid. If condition persists, replace the return hose clamps, return hose O-rings, pressure hose O-rings, gear cylinder line O-rings and the reservoir to pump O-ring.
  4. Repeat the bleed procedure from the beginning. Drive the vehicle approximately 16 km (10 mi) in order to warm the system to operating temperature. Evaluate vehicle on a smooth flat surface.
  5. Verify that there is smooth power assist, the vehicle operates quietly, the pump maintains the proper fluid level, that there is not any leaking in the steering system and that the fluid is free of foam or discoloration.
scientia non olet · About LEMON Manuals