matic transmission fluid is to be used in the system. Damage may result to the power steering pump and
system if any other fluid is used, and do not overfill.

The pump is connected to the steering gear via the pressure hose and the return hose. The pump shaft has a
pressed-on pulley that is belt driven by the crankshaft pulley.

All vehicles are equipped with a power steering fluid cooler.

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NOTE: Power steering pumps are not interchangeable with pumps installed on other vehicles.

OPERATION

Hydraulic pressure is provided for the power steering
gear by the belt driven power steering pump (2). The
power steering pumps are constant flow rate and dis-
placement, vane-type pumps.

DIAGNOSIS AND TESTING

PUMP LEAKAGE

The pump is serviced as an assembly and should not be disassembled. The plastic pump reservoir and the reser-
voir o-rings can be replaced.

Check for leaks in the following areas:

•

Pump shaft seal behind the pulley

•

Pump to reservoir O-ring

•

Reservoir cap

•

Pressure and return lines

•

Flow control valve fitting

STANDARD PROCEDURE

FLUSHING POWER STEERING SYSTEM

Flushing is required when the power steering/hydraulic booster system fluid has become contaminated. Contami-
nated fluid in the steering/booster system can cause seal deterioration and affect steering gear/booster spool valve
operation.

1. Raise the front end of the vehicle off the ground until the wheels are free to turn.

2. Remove the return line from the pump.

NOTE: If vehicle is equipped with a hydraulic booster remove both return lines from the pump.

3. Plug the return line port/ports at the pump.

4. Position the return line/lines into a large container to catch the fluid.

5. While an assistant is filling the pump reservoir start the engine.

6. With the engine running at idle turn the wheel back and forth.

NOTE: Do not contact or hold the wheel against the steering stops.

7. Run a quart of fluid through the system then stop the engine and install the return line/lines.

8. Fill the system with fluid and perform Steering Pump Initial Operation, (Refer to 19 - STEERING/PUMP - STAN-

DARD PROCEDURE).

9. Start the engine and run it for fifteen minutes then stop the engine.

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10. Remove the return line/lines from the pump and plug the pump port/ports.

11. Pour fresh fluid into the reservoir and check the draining fluid for contamination. If the fluid is still contaminated,

then flush the system again.

12. Install the return line/lines and perform Steering Pump Initial Operation, (Refer to 19 - STEERING/PUMP -

STANDARD PROCEDURE).

POWER STEERING PUMP - INITIAL OPERATION

WARNING: THE FLUID LEVEL SHOULD BE CHECKED WITH ENGINE OFF TO PREVENT INJURY FROM MOV-
ING COMPONENTS.

CAUTION: MOPAR

ATF+4 is to be used in the power steering system. No other power steering or auto-

matic transmission fluid is to be used in the system. Damage may result to the power steering pump and
system if any other fluid is used, and do not overfill.

Wipe filler cap clean, then check the fluid level. The dipstick should indicate COLD when the fluid is at normal
temperature.

1. Turn steering wheel all the way to the left

2. Fill reservoir up to FULL HOT level and crank engine until it just starts. (DO NOT TURN STEERING WHEEL)

Then turn vehicle off. And re check fluid level, to Full COLD.

3. Crank engine again until it just starts, (DO NOT MOVE STEERING WHEEL) and turn vehicle off. Recheck fluid

level to Full COLD.

4. Turn engine on again, (DO NOT MOVE STEERING WHEEL) and let the vehicle idle for 5 minutes. If possible

apply a 20 in-Hg vacuum to the reservoir, while engine is idling.

5. Turn engine off and recheck fluid level, to FULL COLD.

6. If the Steering gear is replaced. ensure reservoir is at FULL HOT level, start engine and turn wheel to left. Stop

Engine and recheck fluid level to FULL HOT. Start engine and turn wheel to the right. Stop engine and check
fluid level is at FULL COLD.

7. Fill the pump fluid reservoir to the proper level and let the fluid settle for at least two (2) minutes.

8. Start the engine. With the engine idling maintain the fluid level.

9. Raise the front wheels off the ground.

10. Slowly turn the steering wheel lock-to-lock 20 times with the engine off while checking the fluid level.

NOTE: For vehicles with long return lines or oil coolers turn wheel 40 times.

11. Lower the front wheels and let the engine idle for two minutes.

12. Turn the steering wheel in both direction and verify power assist and quiet operation of the pump.

If the fluid is extremely foamy or milky looking, allow the vehicle to stand a few minutes and repeat the procedure.

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