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Power Steering Pump: Inspection

  1. Measure clearance between pump shaft and front housing bushing. Replace components if clearance exceeds specification. See appropriate POWER STEERING PUMP SPECIFICATIONS  table.
  2. Measure vane plate length, height and thickness. Measure vane plate-to-rotor clearance. Replace components if not within specification. See appropriate POWER STEERING PUMP SPECIFICATIONS  table.
    NOTE: If replacing rotor, ensure number stamped on outer edge of rotor is same as number stamped on outer surface of cam ring.
  3. Inspect flow control valve for damage. Coat valve with ATF, and ensure flow control valve moves freely in housing bore. Close one hole on side of flow control valve.
  4. Apply 57-71 psi (4-5 kg/cm2 ) of compressed air in opposite hole on side of valve. Replace flow control valve if air escapes from hole on bottom of valve. Ensure flow control valve spring free length is within specification. See appropriate POWER STEERING PUMP SPECIFICATIONS  table.
CAUTION: If replacing flow control valve, ensure replacement valve has same letter as stamped on outer edge of original valve.
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