Hydraulic System Performance Check

For information on Ford Color Coded Illustrations refer to OEM Color Coding .

Check 

1. NOTE: The steering wheel must be centered for this step.

   Start the engine and allow the hydraulic system to charge the accumulator.

2. Listen to the LH front corner of the vehicle while an assistant turns the steering wheel slightly off-center, left or right, to make sure that the pump enters and exits

   Sleep Mode  .

   • The pump noise should increase and become more high pitched while turning the wheel and become quieter when the wheel is not moving.
   • If the pump is consistently loud and high pitched, the in-line filter may need to be replaced.

3. NOTE: Make sure that the area around and under the vehicle is clear.
   NOTE: The rear wing should be in the retracted position.

   Put the vehicle into

   Track Mode  .

   1. NOTE: Must be checked on the first cycle.

      Make sure that the rear wing deploys smoothly in less than 2 seconds.

   2. If the wing deployment is slow or not smooth, check the wing mechanism for obstructions. If no obstructions are found, bleed the power steering system. Refer to: Power Steering System Bleeding  .
   3. If the wing is clear of obstructions and bleeding the system does not resolve the issue, inspect the wing control valves.
   4. NOTE: This can be checked on subsequent cycles.
      NOTE: Under normal operation, the front will slightly lead the rear of the vehicle.

      Make sure that the suspension ride height moves smoothly and evenly.

4. Inspect the coal chutes to make sure they are fully closed while the rear wing is deployed.

   Courtesy of FORD MOTOR COMPANY

5. Leave the vehicle in

   Track Mode  for 3 minutes to make sure that the system is stable.

   • If the ride height begins to rise, look for signs of leakage on that axle.

6. NOTE: Test drive must be performed in Sport Mode  .
   NOTE: The wing must be set to Auto Mode  .

   Test drive the vehicle.

   • Cycle the vehicle to

     Track Mode  then back to

     Sport Mode  to force the rear wing to deploy.

   1. Drive vehicle over 15 Mph (24.1 Kmh) to make sure that the rear wing retracts.
   2. Drive the vehicle at slow speed moving the steering wheel to make sure the system operates smoothly.
   3. NOTE: Only where and when safe to do so.

      Drive the vehicle above 71 Mph (114.3, Kmh) to make sure the rear wing deploys.

   4. Slow the vehicle to below 45 Mph (72.4 Kmh) to make sure that the rear wing retracts.
   5. NOTE: Only where and when safe to do so.

      Drive the vehicle above 75 Mph (120.7 Kmh) and brake firmly (>0.5g) to check if the air brake deploys.