Expedition 4WD V8-4.6L SOHC VIN W (1999)
Power Steering Bleeding: Service and Repair
Special Tools
NOTE: If the air is not purged from the power steering system correctly, pump failure could result. This condition can occur on pre-delivery vehicles
with evidence of aerated fluid or on vehicles that have had steering component repairs.
A whine heard from the power steering pump may be caused by air in the system. The power steering purging procedure must be performed under the
following conditions:
-
Prior to any component repair for which power steering noise complaints are accompanied by evidence of aerated fluid.
-
After replacement of any power steering system component (gear, hose, etc.).
1. Remove the power steering fluid reservoir cap.
2. Tightly insert the stopper of the special tool into the power steering fluid reservoir.
3. Start the engine and allow it to idle.
