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HOMESERVICE MANUALSFORD2021EDGE SE, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 80 (POWER STEERING SYSTEM)DIAGNOSIS AND TESTINGPOWER STEERINGCOMPONENT TESTSPOWER STEERING FLUID LEAK TEST
2021 Ford Edge SE, 4WD

Power Steering Fluid Leak Test

2021 Ford Edge SE, 4WDSECTION Power Steering Fluid Leak Test
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: This test should only be carried out if a leak in the system has not been detected during a thorough visual inspection. Refer to Inspection and Verification.
  1. Remove the power steering pump reservoir cap and check the power steering fluid level. If necessary, add the specified power steering fluid. Automatic Transmission Fluid (WSS-M2C938-A;MERCON ® LV)
  2. Tightly install the Power Steering Evacuation Cap onto the reservoir and connect the Vacuum Pump Kit to the Evacuation Cap.
  3. Using the Vacuum Pump Kit, apply 68-85 kPa (20-25 in-Hg) of vacuum to the power steering system.
  4. Observe the vacuum gauge for 30 seconds. If the vacuum gauge reading drops more than 3 kPa (0.88 in-Hg), a leak is present.
  5. Remove the Vacuum Pump Kit.
  6. Start the engine and insert the Dial Thermometer into the Evacuation Cap.
  7. NOTE: Do not hold the steering wheel at the stops for more than 5 seconds. Damage to the power steering pump may occur.

    With the engine at idle, raise the power steering fluid temperature to 74-80 °C (165-176 °F) by rotating the steering wheel fully to the left and right several times.

  8. Stop the engine and visually inspect the system for leaks.

    • If a leak is evident, repair as necessary.
    • If a leak is not evident, add the specified UV fluorescent tracer dye to the power steering fluid. Use 14.78 ml (1/2 oz) of dye solution for every 1.89L (2 qt) of power steering fluid.

  9. NOTE: Do not hold the steering wheel at the stops for more than 5 seconds. Damage to the power steering pump may occur.

    Start the engine. With the engine at idle, raise the power steering fluid temperature to 74-80 °C (165-176 °F) by rotating the steering wheel fully to the left and right several times.

  10. Stop the engine and inspect the system including the Hydro-Boost (if equipped), for traces of UV dye using the 100W/12 Volt DC UV Lamp. Repair as necessary.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.