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Power Steering System Purging

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
Special Tools

Illustration Tool Name Tool Number
GF0000997Courtesy of FORD MOTOR CO.
 Vacuum Pump Kit 416-D002 (D95L-7559-A) or equivalent
GF0001258Courtesy of FORD MOTOR CO.
 Evacuation Cap, Power Steering 211-265 or equivalent
Material

Item Specification
MERCON® V Automatic Transmission Fluid
XT-5-QM (or XT-5-QMC) (US); CXT-5-LM12 (Canada)		 MERCON® V
    WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in FIRE SUPPRESSION SYSTEM article. Failure to follow the instructions may result in serious personal injury.
    CAUTION: If the air is not purged from the power steering system correctly, power steering pump failure may result. The condition may occur on pre-delivery vehicles with evidence of aerated fluid or on vehicles that have had steering component repairs.
  1. If equipped with fire suppression system, depower the system.
    2. NOTE: A whine heard from the power steering pump can be caused by air in the system. The power steering purge procedure must be carried out prior to any component repair for which power steering noise complaints are accompanied by evidence of aerated fluid.
  2. Remove the power steering pump reservoir cap. Check the fluid.
  3. Raise the front wheels off the floor. Refer to the JACKING & LIFTING article for the procedure.
  4. Tightly insert the stopper of the vacuum pump into the reservoir.
  5. Start the engine.
  6. Install the vacuum pump, apply vacuum, and maintain the maximum vacuum of 68-85 kPa (20-25 in-Hg).
  7. If equipped with Hydro-Boost®, apply the brake pedal twice.
    8. CAUTION: Do not hold the steering wheel against the stops for more than 3 to 5 seconds at a time. Damage to the power steering pump may occur.
  8. Cycle the steering wheel fully from stop-to-stop 10 times.
  9. Stop the engine.
  10. Release the vacuum and remove the vacuum pump.
    11. NOTE: Do not overfill the reservoir.
  11. Fill the reservoir.
    • Use approved transmission fluid.
  12. Start the engine.
  13. Install the vacuum pump. Apply and maintain the maximum vacuum of 68-85 kPa (20-25 in-Hg).
    14. CAUTION: Do not hold the steering wheel against the stops for more than 3 to 5 seconds at a time. Damage to the power steering pump may occur.
  14. Cycle the steering wheel fully from stop-to-stop 10 times.
  15. Stop the engine, release the vacuum and remove the vacuum pump.
    16. NOTE: Do not overfill the reservoir.
  16. Fill the reservoir as needed and install the reservoir cap.
  17. Visually inspect the power steering system for leaks.
    18. NOTE: Do not overfill the reservoir.
  18. Fill the reservoir as needed and visually inspect the power steering system for leaks.
  19. Install the reservoir cap.
    20. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM article. Failure to follow these instructions may result in serious personal injury.
  20. If equipped with fire suppression system, repower the system.
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