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Home >> Jeep >> 2005 >> Wrangler Rubicon, Automatic >> Repair and Diagnosis >> Steering >> Steering Column >> Power Steering System >> Steering >> Diagnosis And Testing >> Power Steering Flow And Pressure >> Flow And Pressure Test
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Flow And Pressure Test

  1. Check the power steering belt to ensure it is in good condition and adjusted properly.
  2. Connect pressure gauge hose from the Power Steering Analyzer to Tube 6865.
  3. Connect Adapter 6826 to Power Steering Analyzer test valve end.
  4. Disconnect the high pressure hose from the power steering pump.
  5. Connect Tube 6865 to the pump hose fitting.
  6. Connect the power steering hose from the steering gear to Adapter 6826.
  7. Open the test valve completely.
  8. Start engine and let idle long enough to circulate power steering fluid through flow/pressure test gauge.
  9. Shut off the engine and check the fluid level, add fluid as necessary. Start engine again and let idle.
  10. Gauge should read below 862 kPa (125 psi), if above, inspect the hoses for restrictions and repair as necessary. The initial pressure reading should be in the range of 345-552 kPa (50-80 psi).
  11. Increase the engine speed to 1500 RPM and read the flow meter. The reading should be 2.4 - 2.8 GPM, if the reading is below this specification the pump should be replaced.
    CAUTION: This next step involves testing maximum pump pressure output and flow control valve operation. Do not leave test valve closed for more than three seconds as the pump could be damaged.
  12. Close valve fully three times for three seconds and record highest pressure indicated each time. All three readings must be above pump relief pressure specifications and within 345 kPa (50 psi) of each other. 
    1. Pressures above specifications but not within 345 kPa (50 psi) of each other, replace pump.
    2. Pressures within 345 kPa (50 psi) of each other but below specifications, replace pump.
  13. Open the test valve and turn the steering wheel to the extreme left and right positions against the stops. Record the highest pressure reading at each position. Compare readings to pump specifications chart. If pressure readings are not within 50 psi. of each other, the gear is leaking internally and must be repaired.
    CAUTION: Do not force the pump to operate against the stops for more than 2 to 4 seconds at a time because, pump damage will result.
PUMP SPECIFICATIONS

ENGINE RELIEF PRESSURE +/- 50 FLOW RATE (GPM)
2.4L 9653 kPa (1400 psi) 1500 RPM 2.4 - 2.8 GPM
4.0L 9653 kPa (1400 psi)
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