Power Steering Pump: Description and Operation

DESCRIPTION - POWER STEERING PUMP

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The hydraulic pressure for operation of the power steering gear is provided by a belt driven power steering pump (Fig. 1) (Fig. 2). All applications use a constant flow rate and displacement vane-type power steering pump that is located on the front corner of the engine. No repair procedures are to be done on the internal components of the power steering pump. The only serviceable components of the power steering pump are the power steering pump pulley and the pump itself. The power steering fluid reservoir is serviced with the pump. Because of unique shaft bearings, flow control levels or pump displacements, power steering pumps may be used only on specific vehicle applications. Be sure that all power steering pumps are only replaced with pumps that are the correct replacement for that specific application.

STANDARD PROCEDURE - POWER STEERING PUMP INITIAL OPERATION

WARNING: THE FLUID LEVEL SHOULD BE CHECKED AND ADJUSTED WITH THE ENGINE OFF TO PREVENT INJURY FROM MOVING ENGINE COMPONENTS.

CAUTION: Use only Mopar ATF+4 Automatic Transmission Fluid (MS-9602) in the power steering system. Do not overfill.

1. Fill the power steering fluid reservoir to the proper level, then let the fluid settle for at least two minutes.
2. Start the engine and let run for a few seconds, then turn the engine off.
3. Add fluid if necessary. Repeat the above procedure until the fluid level remains constant after running the engine.
4. Raise the front wheels off the ground.
5. Start the engine. Slowly turn the steering wheel right and left, lightly contacting the wheel stops.
6. Add power steering fluid if necessary.
7. Lower the vehicle and turn the steering wheel slowly from lock to lock.
8. Stop the engine. Check the fluid level and refill as required.
9. If the fluid is extremely foamy, allow the vehicle to stand a few minutes and repeat the above procedure.