Jeep Grand Cherokee WK. Manual - part 1289

PUMP - SERVICE INFORMATION

DESCRIPTION

Hydraulic pressure for the power steering system is
provided by a belt driven power steering pump (4).
The pump shaft has a pressed-on drive pulley (5) that
is belt driven by the crankshaft pulley. The power
steering reservoir (1) is mounted to the pump body
(4), except if the vehicle has 5.7L or Diesel engines
then it has a remote reservoir mounted to the fan
shroud.

OPERATION

The power steering pump (4) is a constant flow rate
and displacement, vane-type pump. The pump internal
parts operate submerged in fluid. The flow control ori-
fice is part of the high pressure line fitting. The pres-
sure relief valve inside the flow control valve limits the
pump pressure. The reservoir is attached to the pump
body with three bolts (7), except if the vehicle is
equipped with a 5.7L or Diesel engine then it has a
remote reservoir mounted to the fan shroud. The
power steering pump is connected to the steering gear
by the pressure and return hoses.

NOTE: Power steering pumps have different pressure rates and are not interchangeable with other pumps.

STANDARD PROCEDURE

INITIAL OPERATION

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

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PUMP - SERVICE INFORMATION

CAUTION: THIS SYSTEM REQUIRES THE USE OF HYDRAULIC SYSTEM / POWER STEERING FLUID WHICH
MEETS DAIMLER CHRYSLER SPECIFICATION MS-10838, SUCH AS MOPAR PART NUMBER 05142893AA, OR
EQUIVALENT, DO NOT MIX POWER STEERING FLUID TYPES. 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
ambient temperature.

1. Fill the pump fluid reservoir to the proper level and let the fluid settle for at least two minutes.

2. Start the engine and let run for a few seconds then turn 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. Slowly turn the steering wheel right and left, lightly contacting the wheel stops at least 20 times.

6. Check the fluid level add if necessary.

7. Lower the vehicle, start the engine and turn the steering wheel slowly from lock to lock.

8. Stop the engine and check the fluid level and refill as required.

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

dure.

CAUTION: Do not run a vehicle with foamy fluid for an extended period. This may cause pump damage.

INITIAL OPERATION - WITH HYDRAULIC COOLING FAN

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

NOTE: Remove as much of the old fluid out of the system as possible with a suction tool or by removing
a hose, When a component has failed. Then refill it with fresh fluid until it is clean. This may have to be
done more than once.

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

1. Fill the pump fluid reservoir to the proper level and let the fluid settle for at least two minutes.

2. Start the engine and let run for a few seconds then turn 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. Slowly turn the steering wheel right and left, lightly contacting the wheel stops at least 20 times.

6. Check the fluid level add if necessary.

7. Lower the vehicle, start the engine, and use the DRB III to activate the hydraulic fan on full fan operation.

8. Turn the steering wheel slowly from lock to lock.

9. Stop the engine, check the fluid level and refill as required and repeat the process

CAUTION: Do not run a vehicle with foamy fluid for an extended period. This may cause pump damage.

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

cedure.

11. While the vehicle is in park, use the DRB III to activate the hydraulic fan to full fan operation and briefly rev the

engine up to 3000 rpm to fully engage the hydraulic fan.

12. Check the fluid level add if necessary.

PUMP - SERVICE INFORMATION

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REMOVAL

PUMP - 3.7L & 4.7L

1. Siphon power steering reservoir.

2. Remove the cooler return hose at the reservoir.

3. Disconnect the pressure hose nut at the pump.

4. Remove the pressure hose at the pump.

5. Remove serpentine drive belt, (Refer to 7 - COOL-

ING/ACCESSORY

DRIVE/DRIVE

BELTS

REMOVAL).

6. Remove 3 pump mounting bolts (1).

7. Remove pulley from pump if necessary (Refer to

19 - STEERING/PUMP/PULLEY - REMOVAL).

PUMP - 5.7L

1. Siphon power steering reservoir.

2. Remove the air intake tube.

3. Remove the drive belt.

4. Disconnect the supply hose (2) at the pump (1).

5. Disconnect the pressure line at the pump.

6. Remove the three pump mounting bolts.

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PUMP - SERVICE INFORMATION

INSTALLATION

PUMP - 3.7L & 4.7L

1. Install pulley on pump if removed (Refer to 19 -

STEERING/PUMP/PULLEY - INSTALLATION).

2. Install 3 pump mounting bolts (1) and tighten to 27

N·m (20 ft. lbs.).

3. Install the drive belt, (Refer to 7 - COOLING/AC-

CESSORY DRIVE/DRIVE BELTS - INSTALLA-
TION).

4. Install the pressure hose on the pump and tighten

the nut to 28 N·m (21 ft. lbs.).

5. Install the cooler return hose at the reservoir.

6. Add power steering fluid, (Refer to 19 - STEER-

ING/PUMP - STANDARD PROCEDURE).

PUMP - 5.7L

1. Install pulley on pump if removed (Refer to 19 -

STEERING/PUMP/PULLEY - INSTALLATION).

2. Install 3 pump mounting bolts (1) and tighten to 27

N·m (20 ft. lbs.).

3. Install the pressure hose on the pump and tighten

the nut to 28 N·m (21 ft. lbs.).

4. Reconnect the supply hose (2) at the pump (1).

5. Install the drive belt, (Refer to 7 - COOLING/AC-

CESSORY DRIVE/DRIVE BELTS - INSTALLA-
TION).

6. Install the air intake tube.

7. Fill the system with power steering fluid.

8. Bleed the hydraulic fan system using a scan tool

(Refer to 19 - STEERING/PUMP - STANDARD
PROCEDURE).

PUMP - SERVICE INFORMATION

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