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Home › Oldsmobile › 1995 › Achieva SC, 2.3 D, Standard › Repair and Diagnosis › Steering › Steering Gear - Power › Testing › Hydraulic System Pressure Check

Hydraulic System Pressure Check

  1. Disconnect high pressure line at rear of power steering pump. Connect Power Steering Analyzer (J-25323-B) between power steering high pressure line and pump fitting. Set parking brake and leave vehicle in Park or Neutral. Open valve on analyzer. Start engine. Allow system to reach operating temperature. Ensure fluid level is correct.
  2. Note power steering pressure and flow at engine idle. DO NOT  move steering wheel while engine is running. Pressure reading should be less than 150 psi (10.5 kg/cm2 ). If pressure is greater than specified, stop engine and repair restrictions.
    CAUTION: Pump will be damaged if valve is held closed for more than 5 seconds.
  3. Completely close valve for a few seconds and then open it. Do this 3 times, recording highest pressure and flow obtained each time valve is closed. If readings are greater than 1000 psi (70 kg/cm2 ), but not within 50 psi (3.5 kg/cm2 ) of each other, remove and clean flow control valve. Ensure flow control valve moves freely in bore.
  4. If pressure readings are less than 1000 psi (70 kg/cm2 ), replace flow control valve and recheck. If readings are still less than 1000 psi (70 kg/cm2 ), replace rotor and vanes. If pump checks okay, leave valve open and go to next step.
  5. Turn steering wheel all the way left and right. DO NOT  hold steering wheel at stops for more than 5 seconds. If highest pressure and flow readings at each stop is not the same as maximum pressure and flow readings obtained in Step 3), steering gear is leaking internally. Remove steering gear and repair as necessary. Remove analyzer assembly. Fill and bleed hydraulic system. See HYDRAULIC SYSTEM BLEEDING  under LUBRICATION.
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