Section 11-00: Steering System—Service
1993 Mustang Workshop Manual
TESTING

Preliminary Tests

Make the following preliminary tests before disassembling power steering:

 

Air Bleeding

If bubbles are present in the power steering fluid, bleed the system as follows:

  1. Fill the reservoir.
  1. Run the engine until the fluid reaches normal operating temperature of 74°-79°C (165° -175°F).

     CAUTION: Do not hold the wheel in the far left or right position, or damage to power steering pump may result.

  1. Turn the steering wheel all the way to the left and right several times.
  1. Check the fluid level.
  1. If air is still trapped in the system, refer to Purging Power Steering System of Air.
 

Fluid Level Check

  1. Run the engine until the fluid reaches normal operating temperature of 74°-79°C (165° -175°F).
  1. Turn the steering wheel all the way to the left and right several times. Turn the engine off.

     CAUTION: Do not overfill the reservoir.

  1. Check the fluid level in the power steering reservoir. If the level is low, add Premium Power Steering Fluid E6AZ-19582-AA (ESW-M2C33-F) or equivalent.
 

Pump Belt Check

Replace and adjust broken, glazed or worn pump belts. Refer to Section 03-05 for adjustment procedure.

 

Fluid Leak Check

  1. With engine idling, turn steering wheel left to right several times. Check all possible leakage points.
  1. Tighten all loose fittings. Replace damaged lines and seals.
  1. Check hoses for cut O-rings.
 

Turning Effort Check

Ensure front wheels are properly aligned and tire pressure is correct before checking turning effort.

  1. Park vehicle on dry concrete and set the parking brake.
  1. Idle the engine for two or three minutes. Turn the steering wheel to the left and right several times to warm the fluid to 43° -49°C (110°-120°F).
  1. With the engine running, attach a pull scale to the rim of the steering wheel. Starting with the road wheels in straight-ahead position, measure the pull required to turn the steering wheel one complete revolution in each direction. Refer to the Static Steering Wheel Turning Efforts chart for acceptable measurements at the back of this section.