REMOVAL & INSTALLATION
See Figures 1 and 2
- Remove the hoses at the pump and tape the openings shut to prevent leakage.
- Remove the pump drive belt.
- Remove the retaining bolts, any braces and the pump.
- If a new pump is being installed, and the pulley is being transferred, a puller is necessary to remove the pulley.
- Torque hose fittings to 20 ft. lbs. (27 Nm). Fill the reservoir with approved power steering fluid and turn the pump backward (counterclockwise as viewed from in front) until bubbles no longer appear in the reservoir.
- Any time the pump is removed, air must be bled from the system upon reinstallation. Bleed the system as described in the next procedure.
- Fill the pump reservoir to the proper level. See the steering index page for fluid recommendations. Operate the engine and turn the steering wheel fully to the left and right without hitting the stops until the power steering fluid reaches normal operating temperature (165-175°F), then stop the engine.
- Raise the front of the vehicle off the ground and support it on jack stands. Failure to raise the front end off the ground could cause flat spots to be worn into the tires during the bleeding procedure.
- Turn the wheels to full left turn position and add power steering fluid to the COLD mark on the dipstick, if necessary.
- Bleed the system by turning the wheels, with the engine running, from side to side without hitting hard against the stops. Maintain the fluid level at the COLD mark on the dipstick. Fluid with air in it will have a milky appearance. Air must be eliminated from the fluid before normal steering action can be obtained. Continue turning the wheels back and forth until all of the air is bled from the system.
- Return the wheels to center position and operate the engine for an additional 2-3 minutes, then stop the engine.
- Road test the car to make sure the steering functions normally and is free of noise. Check the fluid level. All fluid to the HOT mark.
The following tests are generally applicable to most power steering systems.Turning Effort
Check the effort required to turn the steering wheel after aligning the front wheels and inflating the tires to the proper pressure.
- With the vehicle on dry pavement and the front wheels straight ahead, set the parking brake and turn the engine on.
- After a short warm-up period turn the steering wheel back and forth several times to warm the steering fluid.
- Attach a spring scale to the steering wheel rim and measure the pull required to turn the steering wheel one complete revolution in each direction. Check that the effort is approximately equal in both directions.
This test may be done with torque wrench on the steering wheel nut.Fluid Flow and Pressure Relief Valves
When the wheels are turned hard right or hard left, against the stops, the fluid flow and pressure relief valves come into action. If these valves are working, there should be a slight buzzing noise. Do not hold the wheels in the extreme position for over three or four seconds because, if the pressure relief valve is not working, the pressure could get high enough to damage the system.