Section 325 (Power Steering System): Purging

WARNING: This page is about a different car, the 2003 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

If the air is not purged from the power steering system correctly, premature power steering pump failure can result. This condition can occur on pre-delivery vehicles with evidence of aerated fluid or on vehicles that have had steering component repairs.

NOTE:

A whine heard from the power steering pump may be caused by air in the system. The power steering purge procedure must be performed prior to any component repair for which power steering noise complaints are accompanied by evidence of aerated fluid.

Remove the power steering pump reservoir cap. Check the fluid.

Use MERCON(R) Automatic Transaxle Fluid (ATF).

Fig 1: Inserting Stopper Of Vacuum Pump Into Reservoir
Courtesy of MAZDA MOTORS CORP.
Tightly insert the stopper of the vacuum pump into the reservoir.
Start the vehicle.

Fig 2: Applying Maximum Vacuum
Courtesy of MAZDA MOTORS CORP.
Apply maximum vacuum and maintain it for a minimum of three minutes with the engine speed at idle.
Release the vacuum and remove the vacuum pump.

Fig 3: Filling Reservoir
Courtesy of MAZDA MOTORS CORP.
CAUTION:
- Do not overfill the reservoir.
Fill the reservoir.
1. Use MERCON(R) ATF.
  
  Fig 4: Applying & Maintaining Maximum Vacuum
  Courtesy of MAZDA MOTORS CORP.
Reinstall the vacuum pump. Apply and maintain maximum vacuum.

Fig 5: Cycling Steering Wheel
Courtesy of MAZDA MOTORS CORP.
CAUTION:
- Do not hold the steering wheel against the stops for more than three to five seconds at a time. Damage to the power steering pump can occur.
Cycle the steering wheel fully to the left and right every 30 seconds for approximately five minutes.
Stop the engine, release the vacuum, and remove the vacuum pump.
Install the reservoir cap.
Check for fluid leaks at all of the connections. If the power steering fluid shows signs of air, repeat this procedure.