Nissan Pathfinder (2006 year). Manual - part 359

POWER STEERING GEAR AND LINKAGE

PS-15

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2006 Pathfinder

POWER STEERING GEAR AND LINKAGE

PFP:49001

Removal and Installation

EGS0011K

CAUTION:

Spiral cable may snap due to steering operation if the steering column is separated from the steering
gear assembly. Therefore secure the steering wheel to avoid turning.

REMOVAL

1.

Set front wheels in the straight-ahead position.

2.

Remove the front tires from the vehicle, using power tool.

3.

Remove the undercover, using power tool.

4.

On 4WD models, remove the front final drive, then support the drive shafts, using suitable wire. Refer to

FFD-14, "Removal and Installation"

 .

5.

Remove the stabilizer bar brackets and reposition the stabilizer bar. Refer to 

FSU-12, "Removal and

Installation"

 .

6.

Remove the cotter pins at the steering outer sockets.

CAUTION:

Do not reuse the cotter pins.

7.

Loosen the outer socket nuts.

8.

Remove the steering outer sockets from the steering knuckles,
using Tool, then remove the nuts. 

CAUTION:

●

Do not damage the outer socket boots.

●

Do not damage the outer socket threads. Thread the ball
joint nut onto the end of the outer socket during removal. 

1.

Cotter pin

2.

Mounting bracket

3.

Mounting insulator

4.

Steering gear assembly

5.

Washer

⇐

Front

WGIA0170E

Tool number

: HT72520000 (J-25730-A)

WGIA0130E

PS-16

POWER STEERING GEAR AND LINKAGE

2006 Pathfinder

9.

Remove the high-pressure and low-pressure piping from the
steering gear assembly, then drain the fluid from the piping.

10. Remove the bolt from the lower joint of the lower joint shaft, then

separate the lower joint from the steering gear assembly.

CAUTION:

●

Do not damage the lower joint.

11. Remove the nuts and bolts of the steering gear assembly, using

power tool, then remove the steering gear assembly from the
vehicle.

INSTALLATION

Installation is in the reverse order of removal.

●

With the steering wheel in the straight ahead position, align the
slit of the lower joint with the projection on the dust cover. Insert
the joint until surface "A" contacts surface "B".

●

After removing/installing or replacing steering components,
check wheel alignment. Refer to 

FSU-6, "Front Wheel Align-

ment"

 .

●

After adjusting wheel alignment, adjust neutral position of the
steering angle sensor. Refer to 

BRC-58, "Adjustment of Steering

Angle Sensor Neutral Position"

 .

●

Bleed the air from the steering hydraulic system. Refer to 

PS-6,

"Air Bleeding Hydraulic System"

 .

INSPECTION AFTER INSTALLATION

●

Check that the steering wheel turns smoothly to the left and right locks.

●

Check that the number of turns are the same from the straight-forward position to the left and right locks.

●

Check that the steering wheel is in the neutral position when driving straight ahead.

LGIA0032E

LGIA0029E

LGIA0024E

SST491C

POWER STEERING GEAR AND LINKAGE

PS-17

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PS

2006 Pathfinder

Disassembly and Assembly

EGS0011L

CAUTION:

●

Secure the gear housing assembly with a vise. Use copper plates or equivalent to prevent it from
being damaged. Do not grip the cylinder with a vise.

●

Before performing disassembly, clean the gear housing assembly. Be careful not to allow any
cleaner to contact the discharge and return port connectors.

DISASSEMBLY

1.

Remove the cylinder tubes from the gear housing assembly.

2.

Loosen the lock nuts of the outer sockets, then remove the outer sockets from the inner sockets.

3.

Remove the boot clamps from the boots, then remove the boots from the inner sockets and gear housing
assembly.

CAUTION:

●

Do not reuse the large-diameter boot clamps.

●

Do not damage the boots, inner socket or gear housing assembly. If they are damaged, replace
them.

4.

Remove the inner sockets.

1.

Boot clamp

2.

Inner socket

3.

Boot

4.

Boot clamp

5.

Outer socket

6.

Cylinder tubes

7.

Gear housing assembly

8.

Connector

WGIA0171E

PS-18

POWER STEERING GEAR AND LINKAGE

2006 Pathfinder

INSPECTION AFTER DISASSEMBLY
Boot

Check boot for tears, cracks and deformation. Replace if necessary.

Gear Housing Assembly

Check gear housing assembly for dents, cracks or damage. Replace as an assembly if necessary.

Outer Socket and Inner Socket

SWING TORQUE

●

Measure the swing torque, using Tool. When ball stud and inner
socket start moving the measured value must be within the
specification. If the reading is outside the specification, replace
the socket.

ROTATING TORQUE

●

Measure the rotating torque, using Tool. If the value is outside
the specification, replace the outer sockets.

AXIAL END PLAY

●

Apply a load of 490 N (50 kg-f, 110 lb-f) to the ball stud axially.
Use a dial gauge to measure the amount of the movement that
the stud makes. If the value is outside the specification, replace
the sockets.

ASSEMBLY

1.

Install the inner sockets.

Tool number

:

—

(J-44372)

WGIA0131E

Item

Outer socket

Inner socket

Measuring point

Cotter pin hole of stud 

Shown as L: 83.2 mm (3.276 in)

Swing torque

0.3 

−

 2.9 N·m (0.03 

−

 0.29 kg-m, 3 

−

 25 in-lb)

1.0 

−

 7.8 N·m (0.11 

−

 0.79 kg-m, 9 

−

 69 in-lb)

Measuring value

4.84 

−

 46.7 N (0.50 

−

 4.7 kg-f, 4 

−

 34 lb-f)

12.1 

−

 93.7 N (1.3 

−

 9.5 kg-f, 9 

−

 69 lb-f)

Tool number

: ST3127S000 (J-25765-A)

Outer socket 
rotating torque

: 0.3 

−

 2.9 N·m (0.03 

−

 0.29 kg-m, 

3 

−

 25 in-lb)

WGIA0132E

Outer socket

: 0.5 mm (0.020 in) or less

Inner socket

: 0.2 mm (0.08 in) or less

SGIA0057E

POWER STEERING GEAR AND LINKAGE

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2006 Pathfinder

2.

Install the large-diameter side of the boots to the gear housing
assembly.

3.

Install the small-diameter side of the boots to the groove of the
inner sockets.

4.

Install the boot clamps to the boots, as shown.

CAUTION:

Do not reuse the large boot clamps.

5.

Crimp the large boot clamps, using Tool.

6.

Install the cylinder tubes to the gear housing assembly.

7.

Install the lock nuts and outer sockets to the inner sockets.

8.

Thread the outer sockets onto the inner sockets to the specified
length "L", then tighten the lock nuts to the specified torque.
Refer to 

PS-17, "Disassembly and Assembly"

 . Reconfirm that

the tie-rod length "L" is within specification.

SGIA0550E

AST139

Tool number

: KV40107300 (

—

)

RAC1133D

Maximum inner socket 
length "L"

: 84.0 mm (3.31 in)

SGIA0167E

PS-20

POWER STEERING OIL PUMP

2006 Pathfinder

POWER STEERING OIL PUMP

PFP:49110

On-Vehicle Inspection and Service

EGS0011M

CHECKING RELIEF OIL PRESSURE

CAUTION:

Before starting work, confirm that the belt tension is within specification. Refer to 

EM-14, "Tension

Adjustment"

 .

1.

Connect the Tool between the power steering oil pump dis-
charge connector and the high pressure hose, then bleed the air
from the hydraulic circuit. Refer to 

PS-6, "Air Bleeding Hydraulic

System"

 .

2.

Start the engine. Run the engine until the power steering fluid temperature in reservoir tank reaches 50 –
80

°

C (122 – 176

°

F).

CAUTION:

●

Warm up the engine with the shut-off valve fully opened. If the engine is started with the shut-off
valve closed, fluid pressure in the power steering oil pump increases to maximum pressure.
This will raise fluid temperature excessively.

●

Do not contact the belt with the hose while the engine is running.

3.

With the engine at idle, close the shut-off valve and read the relief oil pressure.

CAUTION:

Do not close the shut-off valve of the pressure gauge for more than 10 seconds.

4.

After measurement, open the shut-off valve slowly.

●

If relief oil pressure is outside the specification, replace the power steering oil pump. Refer to 

PS-21,

"Removal and Installation"

 .

5.

After inspection, disconnect the oil pressure gauge and oil pressure gauge adapter from the hydraulic cir-
cuit, then connect the power steering oil pump discharge connector. Add fluid and bleed the air from the
hydraulic circuit thoroughly. Refer to 

PS-6, "Air Bleeding Hydraulic System"

 .

Tool number:

Pressure gauge and shut-off valve

KV48103500
(J-26357 and J-26357-10)

Oil pump side

Connector A and 
O-ring

KV48105300-4 and 5295262U10 
(

—

)

Eye-bolt and O-ring

KV48105300-3 and 5295262U00 
(

—

)

High pressure pip-
ing side

Connector B and 
O-ring

KV48105300-1 and 5295262U00 
(

—

)

Nut

KV48105300-2
(      —       )

Relief oil pressure

: 8.0 – 8.8 mPa (81.60 – 89.76 kg/cm

2

 , 1160.0 – 1276.0 psi)

WGIA0129E

POWER STEERING OIL PUMP

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2006 Pathfinder

Components

EGS0014K

Removal and Installation

EGS0011N

REMOVAL

1.

Drain the power steering fluid from the reservoir tank.

2.

Remove the engine room cover. Refer to 

EM-13, "Removal and Installation"

 .

3.

Remove the air duct assembly. Refer to 

EM-16, "Removal and Installation"

 .

4.

Remove the serpentine drive belt from the auto tensioner and power steering oil pump. Refer to 

EM-14,

"Removal and Installation"

 .

5.

Disconnect the pressure sensor electrical connector.

6.

Remove the high pressure and low pressure piping from the power steering oil pump. Refer to 

PS-24,

"HYDRAULIC LINE"

 .

7.

Remove the power steering oil pump bolts, then remove the power steering pump.

INSTALLATION

Installation is in the reverse order of removal. Refer to 

PS-24, "HYDRAULIC LINE"

  for tightening torque.

●

After installation, bleed the air from the hydraulic circuit thoroughly. Refer to 

PS-6, "Air Bleeding Hydraulic

System"

 .

NOTE:
Belt tension is automatic and requires no adjustment.

1.

Connector

2.

Suction pipe

3.

O-ring

4.

Bracket

5.

Pulley

6.

Lock washer

7.

Body assembly

8.

Copper washers

LGIA0036E

PS-22

POWER STEERING OIL PUMP

2006 Pathfinder

Disassembly and Assembly

EGS0011O

INSPECTION BEFORE DISASSEMBLY

Disassemble the power steering oil pump only if the following items are found.

●

Deformed or damaged pulley, bracket, connector or suction pipe

●

Oil leakage from the suction pipe or connector. 

DISASSEMBLY

NOTE:
Mount the power steering oil pump in a vise as needed.

1.

Remove the connector bolt, connector and copper washers.

CAUTION:

Do not reuse the copper washers.

2.

Remove the suction pipe and O-ring.

CAUTION:

Do not reuse the O-ring.

3.

Remove the pulley nut and pulley.

4.

Remove the bracket bolts and bracket.

INSPECTION AFTER DISASSEMBLY
Body Assembly Inspection

Check the power steering oil pump body assembly for damage. If any damage is found, replace with a new
power steering oil pump assembly.

ASSEMBLY

Assembly is in the reverse order of disassembly.

1.

Connector

2.

Suction pipe

3.

O-ring

4.

Bracket

5.

Pulley

6.

Lock washer

7.

Body assembly

8.

Copper washers

LGIA0036E