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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.

DESCRIPTION AND OPERATION

POWER RACK AND PINION

The power steering rack and pinion system has a rotary control valve that directs 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 that moves the rack left or right. That force is then transmitted through the tie rods to the steering knuckles, which turn the wheels.
If power rack and pinion steering is not available, manual rack and pinion control is used; however, with this system, more steering effort is required. The movement of the steering wheel is transferred to the pinion. The rotary movement of the pinion is then transferred through the pinion threads, which mesh with teeth on the rack, thereby causing the rack to move in a linear direction.
A vane-type of hydraulic pump provides hydraulic pressure for both steering systems.

COMPONENT LOCATOR

RACK AND PINION GEAR



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  1. Outer Tie Rod
  2. Tie Rod End Rock Nut
  3. Rack and Pinion Boot
  4. Inner Tie Rod
  5. Bulkhead Retaining Ring
  6. Bushing & Cylinder Bulkhead
  7. Steering Rack Gear
  8. Rack Inner Seal
  9. Bearing
  10. Pinion Gear
  11. Pinion Shaft Seal
  12. Bushing
  13. Cylinder Liner Kit
  14. Cylinder Liner Kit
  15. Rack Bearing
  16. Adjuster Spring
  17. Adjuster Plug
  18. Grommet
  19. Pinion Bearing
  20. Retaining Ring

DIAGNOSTIC INFORMATION AND PROCEDURES

POWER STEERING RACK AND PINION GEAR

Hissing Noise

Check
Action
Check the intermediate shaft joints for looseness.
Tighten the intermediate shaft 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

Check
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 improper installation.
Tighten the steering gear mounting bracket nuts and bolts.
Check the outer tie rods for improper installation.
Tighten the outer tie rod joints. Replace the outer tie rods.

Poor Return of Steering Wheel to Center

Check
Action
Check the steering wheel for contact with the turn signal housing.
Adjust the turn signal housing.
Check the intermediate shaft joints for binding or looseness.
Replace the intermediate shaft.
Check the power steering pump flow control valve for sticking and improper alignment.
Replace the power steering pump.
Check the wheel alignment.
Align the wheels.
Check the wheel bearings for wear or damage.
Replace the wheel bearings.
Check the intermediate shaft joints for improper installation.
Adjust the intermediate shaft between the steering gear and the steering column. Replace the intermediate shaft.
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.
Check the steering gear adjustments.
Perform a straight-ahead check.
Check the steering column shaft seal for rubbing on the shaft.
Replace the dash seal.
Check the steering shaft bearings for binding.
Replace the stub shaft bearings.

Momentary Increase in Effort When Turning the Wheel Quickly

Check
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/or 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

Check
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 power steering pump serpentine belt for slippage.
Tighten the power steering serpentine belt.
Check for air contamination in the power steering system.
Bleed the power steering system.

Steering Vibrates During Low Speed or Static Steering

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

Excessive Wheel Kickback or Loose Steering

Check
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 improper installation.
Tighten the steering gear mounting bracket nuts and bolts.
Check the intermediate shaft joints for improper Installation Note.
Adjust the intermediate shaft between the steering gear and the steering column. Replace the intermediate shaft.
Check the outer tie rods and the ball joints for looseness.
Tighten the tie rods and the ball joints. Replace the tie rods and the ball joints.

Hard Steering or Lack of Assist (Especially During Parking)

Check
Action
Check the intermediate shaft joints for improper installation.
Adjust the intermediate shaft between the steering gear and the steering column. Replace the coupling flange.
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 intermediate shaft.
Tighten the intermediate shaft. Replace the intermediate shaft, as needed.
Check the power steering pump serpentine belt tension.
Tighten the power steering serpentine belt.

POWER STEERING RACK AND PINION 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 to reach the power steering gear on the bench.
  4. Disconnect the return line from the power steering fluid reservoir. Extend this line 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 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.

STRAIGHT-AHEAD CHECK



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After all the necessary operations on the steering gear are completed (removing and installing, disassembling and assembling), 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 lower intermediate shaft pinch bolt lying parallel to the steering gear?
-
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.
Are the angles within specifications?
Inner angle: 37° 15′
Outer angle: 32° 40′
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
-

REPAIR INSTRUCTIONS

ON-VEHICLE SERVICE




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RACK AND PINION ASSEMBLY

Tools Required

KM-507-B Ball Joint Remover

Removal and Installation Procedure

  1. Raise and suitably support the vehicle.
  2. Remove the wheels. Refer to Section 2E, Tires and Wheels.
  3. Remove the outer tie rod nuts and disconnect the tie rod ends from the knuckle using the ball joint remover KM-507-B. Refer to "Outer Tie Rod" in this section.
  4. Installation Notice
    Tightening Torque
    50 N•m (37 lb-ft)



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  5. Remove the lower pinch bolt from the intermediate shaft. Refer to "Intermediate Shaft And Dash Seal" in this section.
  6. Remove the return line bracket bolt from the cross-member. Refer to Section 6A, Power Steering System.
  7. Installation Notice
    Tightening Torque
    Intermediate Shaft Lower Pinch Bolt
    26 N•m (19 lb-ft)
    Tightening Torque
    Crossmember-to-Return Line Bracket Bolt
    8 N•m (6 lb-ft)



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  8. Disconnect the return line pipe from the power steering gear outlet. Place a drain pan under the steering gear to catch the power steering fluid.
  9. Disconnect the pressure line pipe from the power steering gear inlet.
  10. Remove the rack and pinion assembly mounting bolt and nut.
  11. Installation Notice
    Tightening Torque
    Power Steering Gear
    Inlet-to-Pressure Line
    Fitting Nut
    28 N•m (21 lb-ft)
    Tightening Torque
    Power Steering Gear
    Outlet-to-Return
    Line Fitting Nut
    28 N•m (21 lb-ft)
    Tightening Torque
    Rack and Pinion Assembly Mounting Bolt
    60 N•m (44 lb-ft)
    Tightening Torque
    Rack and Pinion Assembly Mounting Nut
    60 N•m (44 lb-ft)



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  12. Remove the rack and pinion assembly U-clamp mounting bolt and nut.
  13. Remove the U-clamp and the bushing.
  14. Installation Notice
    Tightening Torque
    Rack and Pinion
    Assembly U-clamp
    Mounting Bolt
    60 N•m (44 lb-ft)
    Tightening Torque
    Rack and Pinion
    Assembly U-clamp
    Mounting Nut
    60 N•m (44 lb-ft)



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  15. Remove the rack and pinion assembly.
  16. Installation Notice



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OUTER TIE ROD

Tools Required

KM-507-B Ball Joint Remover

Removal and Installation Procedure

  1. Raise and suitably support the vehicle.
  2. Remove the wheels. Refer to Section 2E, Tires and Wheels.
  3. Remove the outer tie rod nuts and disconnect the tie rod ends from the knuckle using the ball joint remover KM-507-B.
  4. Installation Notice
    Tightening Torque
    50 N•m (37 lb-ft)



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  5. Mark the threads on the inner tie rod to aid in repositioning the adjusting nut.
  6. Loosen the outer tie rod adjusting nut and remove the outer tie rod by twisting it off the inner tie rod.
  7. Installation Notice
    Tightening Torque
    64 N•m (47 lb-ft)


UAA6C080
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DUST BOOT

Tools Required

KM-J-22610 Dust Boot Clamp Installer

Removal and Installation Procedure

  1. Raise and suitably support the vehicle.
  2. Remove the wheel. Refer to Section 2E, Tires and wheels.
  3. Remove the outer tie rod. Refer to "Outer Tie Rod" in this section.
  4. Remove the dust boot retaining clamps.


  5. UAA6C090
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  6. Remove the dust boot.
  7. Installation Notice


UAA6C100
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INTERMEDIATE SHAFT AND DASH SEAL

(Left-Hand Drive Shown, Right-Hand Drive Similar)

Removal and Installation Procedure

  1. Turn the steering wheel until it is horizontal. This is the straight-ahead position. Make a mark on the steering column shaft that lines up with a mark on the intermediate shaft upper universal joint.
  2. Remove the upper pinch bolt from the universal joint on the intermediate shaft.
  3. Installation Notice
    Tightening Torque
    22 N•m (16 lb-ft)


    UAA6C110
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  4. Raise and suitably support the vehicle.
  5. Make a mark on the stub shaft housing that lines up with a mark on the intermediate shaft lower universal joint.
  6. Remove the lower pinch bolt from the universal joint on the intermediate shaft.
  7. Remove the nuts from the dash seal.
  8. Remove the intermediate shaft.
  9. Installation Notice
    Tightening Torque
    Dash Seal Nut
    6 N•m (4 lb-ft)
    Tightening Torque
    Intermediate Shaft
    Lower Pinch Bolt
    25 N•m (18 lb-ft)


UAA6C120
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HYDRAULIC CYLINDER LINES

(Left-Hand Drive Shown, Right-Hand Drive Similar)

Removal and Installation Procedure

  1. Siphon the power steering fluid from the power steering fluid reservoir.
  2. Raise and suitably support the vehicle.
  3. Disconnect the power steering gear hydraulic cylinder pipes from the power steering gear at the valve end. Replace the O-ring seals as needed.
  4. Installation Notice
    Tightening Torque
    18 N•m (13 lb-ft)


    UAA6C130
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  5. Disconnect the power steering gear hydraulic cylinder pipes from the power steering gear at the cylinder end.
  6. Remove the steering gear hydraulic cylinder pipes from the vehicle.
  7. Installation Notice
    Tightening Torque
    27 N•m (20 lb-ft)

UNIT REPAIR



UAA6C140
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RACK AND PINION

Disassembly and Assembly Procedure

  1. Remove the rack and pinion assembly from the vehicle. Refer to "Rack and Pinion Assembly" in this section.
  2. Remove the valve and pinion assembly from the rack and pinion steering assembly. Refer to "Valve and Pinion" in this section.
  3. Remove the rack bearing assembly from the rack and pinion steering assembly. Refer to "Rack Bearing" in this section.


  4. UAA6C150
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  5. Mark the threads on the inner tie rod to aid in repositioning the adjusting nut.
  6. Loosen the adjusting nut and remove the outer tie rod nut and the adjusting nut.
  7. Installation Notice
    1. Remove the dust boot retaining clamps and remove the dust boot.


    UAA6C160
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    1. Remove the cylinder-side inner tie rod and the pinion-side inner tie rod.
    Installation Notice
    Tightening Torque
    100 N•m (74 lb-ft)


    UAA6C170
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    Important : The retaining ring can be released by inserting a small screwdriver through the hole in the side of the housing.

  8. Remove the bulkhead inner cylinder retaining ring, the bulkhead inner cylinder, and the rack.
  9. Installation Notice


    UAA6C180
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UAA6C190
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RACK BEARING

Tools Required

J-42459 Rack Guide Spring Cap Wrench

Removal and Installation 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 J-42459.
  3. Remove the adjuster spring and the rack bearing.
  4. Installation Notice
    Tightening Torque
    12 N•m (9 lb-ft)


UAA6C200
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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 turn the adjuster plug clockwise until a torque of 12 N•m (9 lb-ft) is obtained, then loosen it by 50 to 70 degrees.
  5. Tighten the locknut on the adjuster plug while holding the adjuster plug stationary.
  6. Install the power steering gear. Refer to "Rack and Pinion Assembly" in this section.
  7. Be sure to check the return ability of the steering wheel to center position after adjustment.
  8. Installation Notice
    Tightening Torque
    12 N•m (9 lb-ft)


UAA6C210
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VALVE AND PINION ASSEMBLY

Disassembly and Assembly 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 and the retaining ring from the lower end of the housing.
  3. Notice : If the stub 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. Installation Notice
    Tightening Torque
    30 N•m (22 lb-ft)


    UAA6C220
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  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 dust cover and the upper housing retaining ring.


  8. UAA6C230
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  9. Remove the valve and pinion assembly from the stub shaft housing.


  10. UAA6C240
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  11. Remove the stub shaft dust seal, the stub shaft bearing annulus assembly.


  12. UAA6C250
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  13. Remove the pinion bearing from the stub shaft housing.
  14. Installation Notice

SPECIFICATIONS

GENERAL SPECIFICATIONS

Application
Description
Power Steering Fluid
Power Steering Fluid DEXRON®-III
Capacity
1.1 Liter
Type
Rack and Pinion
Overall Gear Ratio
16:1
Power Steering Angle
185 Tire
Inside
37.4
Outside
32.1
195 Tire
Inside
37.4
Outside
32.1
Grease
Rack
Grease No. 2 Lithium
Ball Joint
Nerita 0460 & Retinax or Crown #2

FASTENER TIGHTENING SPECIFICATIONS

Application
N•m
Lb-Ft
Lb-In
Knuckle-to-Outer Tie Rod Nut
50
37
-
Intermediate Shaft Lower Pinch Bolt
26
19
-
Intermediate Shaft Upper Pinch Bolt
22
16
-
Crossmember-to-Return Line Bracket Bolt
8
6
71
Power Steering Gear Inlet-to-Pressure Line Fitting Nut
28
21
-
Power Steering Gear Outlet-to-Return Line Fitting Nut
28
21
-
Rack and Pinion Assembly Mounting Bolt
60
44
-
Rack and Pinion Assembly Mounting Nut
60
44
-
Rack and Pinion Assembly U-clamp Mounting Bolt
60
44
-
Rack and Pinion Assembly U-clamp Mounting Nut
60
44
-
Inner Tie Rod Adjusting Nut
64
47
-
Dash Seal Nut
6
4
53
Power Steering Gear Hydraulic Cylinder Pipe-to-Valve End Fitting Nut
18
13
-
Power Steering Gear Hydraulic Cylinder Pipe-to-Cylinder End Fitting Nut
27
20
-
Inner Tie Rod Nut
100
74
-
Adjuster Plug Locknut
12
9
106
Valve and Pinion Locknut
30
22
-

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS TABLE


UAA2C330
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KM-507-B Ball Joint Remover

C105C001
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J-42459 Rack Guide Spring Cap Wrench

A104A008
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KM-J-22610 Dust Boot Clamp Installer


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