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Bleeding Hydro-Boost Unit

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2003 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Hydro-Boost is generally self-bleeding. Listed procedure will normally bleed air from power steering system. Normal vehicle operation will remove any additional air.
  1. Fill the power steering oil reservoir with MERCON® Multi-Purpose ATF transmission fluid.
  2. Remove the Powertrain Control Module (PCM) fuse located in the battery junction box, to prevent the engine from starting.
  3. Crank the engine for several seconds.
  4. Check the fluid level in the power steering oil reservoir and add if necessary. Install the PCM fuse.
  5. Start the engine.
  6. With the engine running, turn the steering wheel from stop-to-stop twice. Turn the engine off.
  7. Press the brake pedal several times to discharge the accumulator.
  8. Repeat Steps  5 and  6 .
  9. If foaming occurs, stop the engine and allow the foam to dissipate.
  10. Repeat procedure as required, until all the air is removed from the system (when the foaming stops).
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