To the top of the document
KALOS
To Previous Page To Next Page
GMDE Start Page Load static TOC Load dynamic TOC Help?





SECTION 6C

POWER STEERING GEAR

Caution : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.

SPECIFICATIONS

General Specifications

Application
Description
Power Steering Fluid
DEXRON® II-D
Capacity
1.1 Liter (1.16 qt)
Type
Rack & Pinion
Overall Gear Ratio
16:1
Power Steering Angle
(155)Tire
Inside
39.5°
.
Outside
33°
(175)Tire
Inside
39.5°
.
Outside
33°
(185)Tire
Inside
39.5°
.
Outside
33°
Grease
Rack
Polyureas
Ball Joint
Synthetics Oils & Li Soaps

Fastener Tightening Specifications

Application
N•m
Lb-Ft
Lb-In
Adjuster Plug Locknut
70
52
-
Coolant Surge Tank Attaching Nuts
4
-
35
Coupling Flange Pinch Bolt
22
16
-
Inner Tie Rod Bolts
90
66
-
Outer Tie Rod Hex Nut
60
44
-
Pinion Locknut
30
22
-
Pinion Preload
0.9 to 1.7
-
8 to 15
Power Steering Line Fittings-Cylinder End
27
20
-
Power Steering Line Fittings-Valve End
18
13
-
Steering Gear Inlet and Outlet Pipe Fittings
27
20
-
Steering Gear Retaining Bracket Nuts
22
16
-
Steering Gear Retaining Bracket Studs
22
16
-

SPECIAL TOOLS

Special Tools Table


KM472
Display graphicTranslations of text in graphics


KM-472
Wrench

J36545
Display graphicTranslations of text in graphics


J-36545
Installing Tube

KM507B
Display graphicTranslations of text in graphics


KM-507-B
Ball Joint Remover

J29810
Display graphicTranslations of text in graphics


J-29810
Stub Shaft Protector

KMJ26610
Display graphicTranslations of text in graphics


KM-J-26610
Installer

DIAGNOSIS

Power Rack and Pinion Steering Gear

Hissing Noise

Checks
Action
Check the steering coupling joints for looseness.
Tighten the steering coupling joints.
Check the power steering hose for contact with other components.
Be sure the power steering hose is correctly fitted into the hose clips.

Rattling Noise in Steering Gear

Checks
Action
Check the power steering hose for contact with the body.
Be sure the power steering hose is correctly fitted into the hose clips.
Check the steering gear for insufficient lubrication.
Lubricate the steering gear.
Check the steering gear mounting for looseness.
Tighten the steering gear mounting bracket nuts.
Check the outer tie rods for improper installation.
Tighten the outer tie rod joints. Replace the outer tie rods as needed.

Poor Return of Steering Wheel to Center

Checks
Action
Check the steering wheel for contact with the turn signal housing.
Adjust the turn signal housing.
Check the steering coupling for binding or looseness.
Replace the steering coupling flange.
Check the power steering pump flow control valve for sticking and improper alignment.
Replace the power steering pump.
Check the wheel alignment.
Adjust the wheel alignment.
Check the wheel bearings for wear or damage.
Replace the wheel bearings.
Check the steering gear-to-column joints for improper installation.
Adjust the steering coupling flange on the steering gear and the steering column. Replace the coupling flange as needed.
Check the outer tie rods and the ball joints for binding or looseness.
Tighten the tie rods and the ball joints. Replace the tie rods and the ball joints as needed.
Check the steering gear adjustments.
Perform a straight-ahead check.
Check the steering column shaft seal for rubbing on the shaft.
Replace the shaft seal.
Check the steering shaft bearings for binding.
Replace the steering shaft bearings.

Momentary Increase in Effort When Turning the Wheel Quickly

Checks
Action
Check the power steering pump for internal leaks.
Replace the power steering pump.
Check the hoses for damage or restricted flow.
Replace the power steering hoses and pipes.
Check the power steering fluid level.
Fill the power steering fluid reservoir.
Check the power steering pump flow control valve for sticking and improper operation.
Replace the power steering pump.

Steering Surges or Jerks When Turning with Engine Running

Checks
Action
Check the power steering pump for insufficient pressure.
Replace the power steering pump.
Check the power steering pump flow control valve for sticking and improper operation.
Replace the power steering pump.
Check the pump drive belt for slippage.
Tighten the pump drive belt.
Check for air contamination in the power steering system.
Bleed the power steering system.

Steering Vibrates During Low Speed or Static Steering

Checks
Action
Check for air contamination in the power steering system.
Bleed the power steering system.
Check the pump drive belt for looseness.
Tighten the pump drive belt.

Excessive Wheel Kickback or Loose Steering

Checks
Action
Check for air contamination in the power steering system.
Bleed the power steering system.
Check the wheel bearings for wear or damage.
Replace the wheel bearings.
Check the steering gear mounting for looseness.
Tighten the steering gear mounting bracket nuts.
Check the steering gear-to-column joints for improper installation.
Adjust the steering coupling flange on the steering gear and the steering column. Replace the coupling flange as needed.
Check the outer tie rods and ball joints for looseness.
Tighten the tie rods and the ball joints. Replace the tie rods and the ball joints as needed.

Hard Steering or Lack of Assist (Especially During Parking)

Checks
Action
Check the steering gear-to column joints for improper installation.
Adjust the steering coupling flange on the steering gear and the steering column. Replace the coupling flange as needed.
Check the power steering pump flow control valve for sticking and improper installation.
Replace the power steering pump.
Check the power steering pump for insufficient pressure.
Replace the power steering pump.
Check the power steering pump for internal leaks.
Replace the power steering pump.
Check for a loose or a worn steering coupling.
Tighten the steering coupling flange. Replace the steering coupling flange as needed.
Check the pump drive belt tension.
Adjust the pump drive belt tension.

Power Rack and Pinion Steering Gear Bench Testing

Removal, Setup and Testing Procedure

Notice : Pressure checks or pressure and flow checks may also be conducted using this setup.

  1. Disconnect and remove the power steering gear. Refer to "Rack and Pinion Assembly" in this section.
  2. Place the power steering gear on a bench next to the vehicle.
  3. Disconnect the pressure line at the point where the hose connects to the pipe. Extend this line in order to reach the power steering gear on the bench.
  4. Disconnect the return line from the the power steering fluid reservoir. Extend this line in order to reach the power steering gear on the bench.
  5. Connect the power steering pipes to the power steering gear.
  6. Start the engine and allow it to idle for 10 seconds.
  7. Check the power steering fluid level. Refer to Section 6A, Power Steering System.
  8. Start the engine and turn the rack and pinion stub shaft to a full turn in each direction. Hold the shaft against each stop for 5 seconds.
  9. Inspect for possible leak points. Refer to Section 6A, Power Steering System.

Installation Procedure

  1. Stop the engine.
  2. Disconnect the power steering pipes from the power steering gear.
  3. Remove the extensions and reconnect the pressure and return lines.
  4. Install and connect the power steering gear. Refer to "Rack and Pinion Assembly"in this section.
  5. Start the engine and allow it to idle for 10 seconds.
  6. Check the power steering fluid level. Refer to Section 6A, Power Steering System.

MAINTENANCE AND REPAIR

ON-VEHICLE SERVICE



T3B16C01
Display graphicTranslations of text in graphics


Rack and Pinion Assembly

Tools Required

KM-507-B Ball Joint Remover

Removal Procedure

  1. Disconnect the negative battery cable.
  2. Position the tires straight ahead by turning the steering wheel.
  3. Remove the Interm Shaft.Refer to Section 6E, Steering Wheel And Column.


  4. T3B16C02
    Display graphicTranslations of text in graphics


  5. Remove the Front Tires.
  6. Drain the Power Steering fluid from the Rack And Pinion.
  7. Disconnect the Steering Gear Inlet and Outlet pipe fittings.


  8. T3B16C03
    Display graphicTranslations of text in graphics


  9. Remove the outer tie rod hex nuts. Refer to "outer tie rod" in this section.


  10. T3B12C09
    Display graphicTranslations of text in graphics


  11. Remove the ball joint hex nuts and disconnect the stabilizer shaft from the knuckle by removing the stabilizer shaft link assembly. Refer to Section 2C, Front Suspension.


  12. T3B16C04
    Display graphicTranslations of text in graphics


  13. Remove the cross member by removing the nuts and bolts to the underbody.


  14. T3B16C05
    Display graphicTranslations of text in graphics


  15. Remove the Rack and Pinion assembly by disconnecting the steering gear retaining bracket nuts.


T3B16C05
Display graphicTranslations of text in graphics


Installation Procedure

  1. Install the Rack and Pinion assembly by connecting the steering gear retaining bracket nuts.
  2. Tighten
    Tighten the steering gear retaining bracket nuts to 50 N•m(37 lb-ft).



    T3B16C04
    Display graphicTranslations of text in graphics


  3. Install the cross member by tightening the nuts and bolts to the underbody.
  4. Tighten
    Tighten the cross member by tightening the nuts and bolts to the underbody to 150 N•m (111 lb-ft).



    T3B12C09
    Display graphicTranslations of text in graphics


  5. Install the ball joint hex nuts and connect the stabilizer shaft to the knuckle by tightening the the bolt with stabilizer shaft link assembly. Refer to Section 2C, Front Suspension.
  6. Tighten
    Tighten the ball joint hex nuts to knuckle to 45 N•m(33 lb-ft). Tighten the bolts of stabilizer shaft to the knuckle to 45 N•m (33 lb-ft).



    T3B16C03
    Display graphicTranslations of text in graphics


  7. Install the outer tie rod hex nuts.
  8. Tighten
    Tighten the outer tie rod hex nuts to 45 N•m (33 lb-ft).



    T3B16C02
    Display graphicTranslations of text in graphics


  9. Connect the Steering Gear Inlet and Outlet pipe fittings.
  10. Tighten
    Tighten the nuts of Steering Gear Inlet and Outlet pipe fittings to 22 N•m (16 lb-ft).

  11. Install the Front Tires.Refer to Section 2E, Tires and Wheels.
  12. Refill the Power Steering fluid.
  13. Notice : When adding fluid or making a complete fluid change, always use DEXRON-III power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.



    T3B16C01
    Display graphicTranslations of text in graphics


  14. Install the Interm Shaft.Refer to Section 6E, Steering Wheel And Column.
  15. Install the steering wheel and column.
  16. Connect the negative battery cable.
  17. Important : After all the operations with the steering gear, be sure to check the exact straight-ahead position of the steering in each case.Refer to "Straight-ahead check" in this section.



T3B16C06
Display graphicTranslations of text in graphics


Outer Tie Rod

Tools Required

KM-507-B Ball Joint Remover

Removal Procedure

  1. Remove the outer tie rod hex nut and disconnect the outer tie rod from the steering knuckle using the special tool KM-507-B.


  2. T3B16C07
    Display graphicTranslations of text in graphics


  3. Loose the tie rod lock nuts and remove the outer tie rod.
  4. Important : Before loose the tie rod lock nut, mark the position of the lock nut for easy alignment after installation procedure.



T3B16C07
Display graphicTranslations of text in graphics


Installation Procedure

  1. Install the outer tie rod by tightening the lock nuts to 54 N•m(40 lb-ft).


  2. T3B16C06
    Display graphicTranslations of text in graphics


  3. Install the outer tie rod by tightening the hex nut to 45 N•m(33 lb-ft).

Inner Tie Rod

Removal Procedure

  1. Refer to the unit repair of power steering gear in this section.


T3B16C08
Display graphicTranslations of text in graphics


Rack Bearing Preload On-Vehicle Adjustment

Adjustment Procedure

    Make the rack bearing adjustment with the front wheel raised and the steering wheel centered. Be sure to check the returnability of the steering wheel to center after the adjustment.
  1. Loosen the locknut and turn the adjuster plug clockwise until a torque of 10 N•m (88 lb-in) is obtained.
  2. Back the adjuster plug off by 55 to 65 degrees. Check the pinion preloaded torque is within the range 0.9 to 1.7 N•m (8 to 15 lb-in).
  3. Tighten the adjuster plug locknut while holding the adjuster plug stationary.
  4. Tighten
    Tighten the adjuster plug locknut to 70 N•m (52 lb-ft).



T3B16C09
Display graphicTranslations of text in graphics


Straight-Ahead Check

After all the necessary operations on the steering gear are completed, check the exact straight-ahead position of the steering in each case.
With the vehicle on the floor, place the steering wheel in the straight-ahead position. Mark the centerline of both tires on the floor. Turn the steering wheel all the way to the right and mark the new centerline of both tires on the floor.

Straight-Ahead Check Table

Step Action Value(s) Yes No
1
Place the steering wheel in the straight-ahead position.
Is the wheel in the correct position?
-
Go to Step 2
-
2
Is the steering coupling flange pinch bolt lying horizontally?
-
Go to Step 3
Go to Step 4
3
Is the steering wheel off center by more than 5 degrees?
-
Go to Step 5
Go to Step 6
4
The pinion is displaced on the rack. The steering pinion position must be corrected.
Is the repair complete?
-
Go to Step 2
-
5
Remove steering wheel and center on the spindle splines.
Is the repair complete?
-
Go to Step 3
-
6
Turn the steering wheel all the way to the right. Measure the inner and the outer angles of the tire centerline compared to the straight-ahead centerline. Do the angles match the value specified?
Inner angle: 39° 5'± 1° 30'
Outer angle: 34° ± 1° 30'
System OK
Go to Step 7
7
The rack assembly was not assembled correctly.
Repair, as needed.
Is the repair complete?
-
Go to Step 6
-

UNIT REPAIR



T3B16C11
Display graphicTranslations of text in graphics


Rack Bearing

There is no provision for overhaul or disassembly of the rack and pinion power steering gear. The power steering gear is served only as an assembly.

Removal Procedure

  1. Remove the rack and pinion steering assembly from the vehicle. Refer to "Rack and Pinion Assembly" in this section.
  2. Remove the adjuster plug locknut from the adjuster plug, and remove the adjuster plug from the housing with the rack guide spring cap wrench(22mm).


  3. T3B16C10
    Display graphicTranslations of text in graphics


  4. Remove the adjuster spring and rack bearing.

Installation Procedure

    Tighten
    Tighten the adjuster plug to 12N•m(9 lb-ft).



T3B16C11
Display graphicTranslations of text in graphics


Rack Bearing Preload Adjustment

Adjustment Procedure

  1. Raise and suitably support the vehicle.
  2. Center the steering wheel.
  3. Remove the power steering gear. Refer to "Rack and Pinion Assembly" in this section.
  4. Loosen the locknut and the adjuster plug clockwise until a torque of 12N.m(9lb-ft) is obtained, then loosen it by 50 to 70 degrees.


  5. T3B16C11
    Display graphicTranslations of text in graphics


  6. Tighten the locknut on the adjuster plug while holding the adjuster plug stationary.
  7. Install the power steering gear. Refer to "Rack and Pinion Assembly" in this section.
  8. Be sure to check the return ability of the steering wheel to center position after adjustment.
  9. Tighten
    Tighten the adjuster plug to 12 N•m (9 lb-ft) and the adjuster plug lock nut to 30 N•m (22 Ib-ft).



T3B16C12
Display graphicTranslations of text in graphics


Valve and Pinion Assembly

Disassembly Procedure

  1. Remove the rack and pinion steering assembly from the vehicle. Refer to "Rack and Pinion Assembly" in this section.
  2. Remove the dust cover from the lower end of the housing.
  3. Notice : If the stud shaft is not held, damage to the pinion teeth will occur.

  4. While holding the stub shaft with a wrench, remove the locknut from the pinion.


  5. T3B16C13
    Display graphicTranslations of text in graphics


  6. With the gear centered, mark the location of the stub shaft notch on the housing to aid in properly installing the pinion and valve assembly.
  7. Remove the upper housing retaining ring.


  8. T3B16C14
    Display graphicTranslations of text in graphics


  9. Remove the valve and pinion assembly from the stub shaft housing.
  10. Notice : Be sure to remove the stub shaft from the housing with caution, otherwise the shaft, bearing and seal could be damaged.



    T3B16C15
    Display graphicTranslations of text in graphics


  11. Remove the stub shaft dust seal, the stub shaft bearing annulus assemly.


T3B16C16
Display graphicTranslations of text in graphics


Installation Notice

    Notice : Be sure to install the stub shaft to the housing with caution, otherwise the shaft, bearing and seal could be damaged.



T3B16C16
Display graphicTranslations of text in graphics


Rack and Pinion

Removal Procedure

  1. Remove the tie rod.
  2. Remove the rack bearing. Refer to "Valve and Pinion Assembly" in this section.


  3. T3B16C17
    Display graphicTranslations of text in graphics


  4. Remove the pinion shaft ball bearing.
  5. Notice : The Pinion shaft ball bearing should be removed with caution by tapping the shaft gently.



    T3B16C18
    Display graphicTranslations of text in graphics


  6. Remove the sir clip from the rack gear housing.


  7. T3B16C19
    Display graphicTranslations of text in graphics


  8. Remove the rack gear and stopper by pulling them.
  9. Remove the rack gear stopper.


T3B16C20
Display graphicTranslations of text in graphics


Inspection Procedure

  1. Check any damage on the rack gear.


  2. T3B16C21
    Display graphicTranslations of text in graphics


  3. Check and damage on the pinion gear and valve assembly.


  4. T3B16C22
    Display graphicTranslations of text in graphics


  5. Check and tie rod and ball joint.


T3B16C12
Display graphicTranslations of text in graphics


Installation Procedure

  1. Install the pinion lock nut.
  2. Tighten
    Tighten the pinion lock nut to 30 N•m (22 Ib-ft).



    T3B16C11
    Display graphicTranslations of text in graphics


  3. Install the adjust nut and its lock nut. Refer to "Rack Bearing Preload Adjustment" in this section.


  4. T3B16C23
    Display graphicTranslations of text in graphics


  5. Install the tie rod.
  6. Tighten
    Tighten the tie rod to 100 N•m (75 Ib-ft).

GENERAL DESCRIPTION AND SYSTEM OPERATION

Power Rack and Pinion

General Description

The power rack and pinion steering system has a rotary control valve which directs the hydraulic fluid coming from the hydraulic pump to one side or the other side of the rack piston. The integral rack piston is attached to the rack. The rack piston converts hydraulic pressure to a linear force which moves the rack left or right. The force is then transmitted through the inner and the outer tie rods to the steering knuckles, which turn the wheels.
If hydraulic assist is not available, manual control is maintained. However, under these conditions, more steering effort is required. The movement of the steering wheel is transferred to the pinion. The movement of the pinion is then transferred through the pinion teeth, which mesh with the teeth on the rack, causing the rack to move.
A vane-type pump provides hydraulic pressure for the system.
The boot and rack guide, the rack bearings, and the valve and pinion assembly are no longer serviceable on this vehicle. They must be replaced as whole units.


To Previous Page To Next Page
© Copyright General Motors Daewoo Europe. All rights reserved