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SECTION 6B

POWER STEERING PUMP

DESCRIPTION AND OPERATION

GENERAL DESCRIPTION

The power steering pump is a multivaned hydraulic pump. The serpentine accessory drive belt on the engine drives the power steering pump. The power steering pump provides the hydraulic pressure to the power steering gear.
The power steering gear uses the hydraulic pressure to assist in steering the vehicle. The power steering system uses a remote reservoir in order to make available more space in the engine compartment.
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.

DIAGNOSTIC INFORMATION AND PROCEDURES

POWER STEERING PUMP DIAGNOSIS

Foaming or Milky Power Steering Fluid (Air in Fluid)

Check
Action
Check for internal leakage in the power steering pump, causing an overflow.
Repair the internal pump leakage.
Bleed the system.
Check for a low fluid level.
Repair the internal pump leakage.
Bleed the system.
Cold temperatures will cause the air bubbles in the system if the fluid level is low.

Low Pressure Due to Power Steering Pump

Check
Action
Check for an external leakage of the power steering pump at the seals.
Replace the seals.
Repair the leak.
Bleed the system.
Check for a worn serpentine accessory drive belt.
Replace the serpentine accessory drive belt.

Low Pressure Due to Power Steering Gear

Check
Action
Check for a scored housing bore.
Replace the housing bore.
Check for leakage at the valve rings or the seals.
Repair the leak.
Bleed the system.

Groaning Noise in the Power Steering Pump

Check
Action
Check for air in the power steering fluid.
Perform the checks listed in "Foaming or Milky Power Steering Fluid (Air in Fluid)" above.
Check for a low level of power steering fluid.
Repair any internal or external leaks.
Bleed the system.
Check for a loose mounting of the power steering pump.
Tighten the pump mounting to specifications.

REPAIR INSTRUCTIONS

ON-VEHICLE SERVICE



UAA6B010
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SERPENTINE ACCESSORY DRIVE BELT

Removal and Installation Procedure

    Tools Required

    DW 110-080 Serpentine Accessory Drive Belt Remover
  1. Use a Serpentine Accessory Drive Belt Remover to turn the tensioner bolt clockwise, compressing the tensioner, and releasing the tension on the serpentine accessory drive belt.
  2. Remove the serpentine accessory drive belt .


UAA6B020
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POWER STEERING PUMP ASSEMBLY

Removal and Installation Procedure

  1. Remove the serpentine accessory drive belt Refer to "Serpentine Accessory Drive Belt" in this section.
  2. Siphon the power steering fluid from the fluid reservoir.
  3. Disconnect the pressure line pipe from the outlet connection on the power steering pump and the pressure line hose from the inlet connection on the power steering pump.
  4. Installation Notice
    Tightening Torque
    28 N•m (21 lb-ft)


    UAA6B030
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  5. Remove the bolt from the front right side of the power steering pump.
  6. Remove the power steering pump assembly mounting bolts.
  7. Remove the power steering pump assembly.
  8. Installation Notice
    Tightening Torque
    Power Steering
    Pump Front
    Right Side Bolt
    25 N•m (18 lb-ft)
    Tightening Torque
    Power Steering
    Pump Mounting
    Bolts
    25 N•m (18 lb-ft)

UNIT REPAIR

POWER STEERING PUMP PULLEY

The power steering pump pulley in this vehicle is not serviceable. If the power steering pump pulley is defective, you must replace the power steering pump assembly.

SPECIFICATIONS

GENERAL SPECIFICATIONS

Application
Description
Lubricant
DEXRON®II-D
Capacity
1.1 Liter
Type
Vane

FASTENER TIGHTENING SPECIFICATIONS

Application
N•m
Lb-Ft
Lb-In
Power Steering Pump-to-Pressure Line Pipe Fitting Nut
28
21
-
Power Steering Pump Front Right Side Bolt
25
18
-
Power Steering Pump Mounting Bolt
25
18
-

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS TABLE


D108B101
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DW 110-080
Serpentine Accessory
Drive Belt Remover


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