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SECTION 6B

POWER STEERING PUMP

SPECIFICATIONS

General Specifications

Application
Description
Lubricant
Power Steering Fluid DEXRON®-II or III
Pressure (without EVO)
8,330-8,820 kPa (1,208-1,279 psi)
Type
vain
Displacement
9.6 cc/rev
Relief Pressure
90 kg/cm²
Capacity
1ℓ

Fastener Tightening Specifications

Application
N•m
Lb-Ft
Lb-In
Air Filter Housing Assembly Bolts
6
-
53
High-Pressure Hose Fitting
28
21
-
Power Steering Pump Bolts
25
18
-
Power Steering Pump Pulley Nut
61
45
-
Right Side Power Steering Pump Bracket Bolts
35
26
-

DIAGNOSIS

Power Steering Pump Diagnosis

Foaming or Milky Power Steering Fluid (Air in Fluid)

Checks
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

Checks
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

Checks
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

Checks
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.

MAINTENANCE AND REPAIR

ON-VEHICLE SERVICE



V3B36B01
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Serpentine Accessory Drive Belt

Removal Procedure

  1. Remove the coolant reservoir tank.


  2. V3B36B02
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  3. Use a wrench to turn the tensioner bolt clockwise, compressing the tensioner, and releasing the tension on the serpentine accessory drive belt.


  4. V3B36B03
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  5. Remove the serpentine accessory drive belt.


V3B36B03
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Installation Procedure

  1. Use a wrench to turn the tensioner bolt clockwise, compressing the tensioner, and releasing the tension on the serpentine accessory drive belt.
  2. With the wrench in place on the tensioner bolt, loop the serpentine accessory drive belt loosely over the pulleys.


  3. V3B36B04
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  4. Slip the belt over the tensioner.
  5. Remove the wrench from the tensioner bolt and the belt will tighten itself.


  6. V3B36B01
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  7. Install the coolant reservoir tank.
  8. Tighten
    Tighten the coolant reservoir tank securing bolts to 6 N•m (53 lb-in).



V3B36B02
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Pump Assembly

Removal Procedure

  1. Remove the serpentine accessory drive belt. Refer to "Serpentine Accessory Drive Belt" in this section.


  2. V3B36A02
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  3. Position a drain pan to catch the power steering fluid that will drain from the high-pressure hose after it is disconnected from the power steering pump.
  4. Disconnect the high-pressure hose and the supply hose from the power steering pump.


  5. V3B36B05
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  6. Remove the bolt from the front right side of the power steering pump. Loosen the rear right bolt and swing the bracket out of the way.


  7. V3B36B06
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  8. Remove the two long power steering pump bolts and remove the power steering pump from the vehicle.


V3B36B06
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Installation Procedure

  1. Install the power steering pump into the vehicle and install the two long power steering pump bolts.
  2. Tighten
    Tighten the power steering pump bolts to 25 N•m (18 lb-ft).

  3. Swing the power steering pump bracket down and install the front right side bolt.
  4. Tighten
    Tighten both of the right side power steering pump bracket bolts to 35 N•m (26 lb-ft).



    V3B36A02
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  5. Connect the supply hose to the power steering pump.
  6. Connect the high-pressure hose fitting to the power steering pump.
  7. Tighten
    Tighten the high-pressure hose fitting to 28 N•m (21 lb-ft).



    V3B36B02
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  8. Install the serpentine accessory drive belt. Refer to "Serpentine Accessory Drive Belt" in this section.
  9. Refill the power steering fluid. Refer to Section 6A, Power Steering System.
  10. Bleed the power steering system. Refer to Section 6A, Power Steering System.

UNIT REPAIR



    V5B36B01
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    The unit repair of the power steering pump in this vehicle is not serviceable.
    A faulty pump must be replaced with a new one.

GENERAL DESCRIPTION AND SYSTEM OPERATION

Power Steering Pump

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.


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