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Pump Flow & Pressure Test

NOTE: Before carrying out the pump flow and pressure test, complete the INSPECTION & VERIFICATION  under TROUBLE SHOOTING.
NOTE: Testing procedure requires using Ford Power Steering Analyzer (D79L-33610) or equivalent.
  1. Remove the power steering high-pressure tube support bracket retaining bolt from the engine mounting bracket.
  2. Disconnect the power steering high-pressure tube between the power steering pump and steering gear. Allow fluid to drain into a suitable container.
  3. Using a Power Steering Analyzer Adaptor 211-D010 (D87C-33610-A) or equivalent, attach the power steering analyzer in line of the high-pressure tube.
  4. Attach a suitable digital tachometer to monitor RPM of the power steering pump.
  5. Place a thermometer in the power steering reservoir.
    6. CAUTION: Make sure the valve on the power steering system analyzer is open, allowing the system to function normally.
  6. Fill the power steering reservoir to the MAX mark.
  7. With engine running, raise fluid temperature to 165°-175° F (74°-79° C) by turning the steering wheel from stop-to-stop several times.
    8. CAUTION: Do not leave the valve on the power steering analyzer closed for more than five seconds. Do not hold the steering wheel against a stop for more than three to five seconds at a time, as damage to the power steering pump may result.
  8. Record the following:
    • Minimum pump flow gallons/minute (liters/minute) at 165°-175° F (74°-79° C).
    • System back pressure psi (kg/cm2 ) at 165°-175° F (74°-79° C) at idle with the gate valve fully open.
  9. Partially close the gate valve to build up pressure to 740 psi (52 kg/cm2 ). Observe and record minimum pump flow gallons/minute (liters/minute) at 165°-175° F (74°-79° C).
  10. Increase pump speed to approximately 2500 RPM. Observe and record minimum pump flow, gallons/minute (liters/minute).
  11. Compare results with those listed in POWER STEERING PUMP FLOW SPECIFICATIONS  table or POWER STEERING PUMP RELIEF PRESSURE  table. If pressure recorded is lower than minimum specification listed, install a new steering pump. See POWER STEERING PUMP  under REMOVAL & INSTALLATION.
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