Expedition 4WD V8-4.6L SOHC VIN 6 (1997)
6. Verify Power Steering Analyzer valve is open.
7. Place the Dial Thermometer in the power steering fluid reservoir.
8. Fill the system.
9. With the engine running, raise the fluid temperature to 50-60° C (122-140° F) by rotating the steering wheel fully left and fully right several times.
CAUTION: Do not hold the steering wheel against the stops for an extended period of time. Damage to the pump could occur.
10. Measure the power steering pump output pressure by closing the valve and increasing the engine speed to 1000-1500 rpm.
CAUTION: Do not leave the Power Steering Analyzer valve closed for more than 15 seconds.
11. If the pressure recorded is lower than the minimum specified pressure, replace the pump. If the pressure is too high, inspect for a kinked hose and
repair as necessary.
12. Increase engine speed to 2500 rpm. If the flow exceeds the maximum free flow specified, replace the power steering pump.
13. Measure the pressure generated at the steering gear by leaving the valve on Power Steering Analyzer open and decreasing engine speed to
1000-1500 rpm. Rotate the steering wheel fully left or fully right and read the pressure.
14. If the pressure is not within specifications, replace the steering gear.