Nissan Frontier. Manual - part 1184

POWER STEERING GEAR AND LINKAGE

ST-15

< REMOVAL AND INSTALLATION >

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POWER STEERING GEAR AND LINKAGE

Removal and Installation

INFOID:0000000009479922

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.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. Set front wheels in the straight-ahead position.
2. Remove the front wheels and tires from the vehicle, using power tool. Refer to 

WT-48, "Adjustment"

.

3. Drain the power steering fluid.
4. Remove the engine under cover, using power tool. Refer to 

EXT-15, "Removal and Installation"

.

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

DLN-191, "Removal and Installation"

.

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

FSU-15, "Removal and

Installation"

.

7. Remove the cotter pins at the steering outer sockets.

CAUTION:

Do not reuse the cotter pins.

8. Loosen the outer socket nuts.
9. 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.

Bracket

3.

Insulator

4.

Steering gear assembly

5.

Washer

Front

AWGIA0253ZZ

Tool number

: HT72520000 (J-25730-A)

WGIA0130E

ST-16

< REMOVAL AND INSTALLATION >

POWER STEERING GEAR AND LINKAGE

10. Remove the high-pressure and low-pressure piping from the

steering gear assembly, then drain the fluid from the piping.

CAUTION:

Do not reuse O-ring.

11. Remove the pinch bolt from the lower joint shaft, then separate

the lower joint from the steering gear assembly.

CAUTION:

Do not damage the lower joint.

12. 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.

CAUTION:

Do not reuse O-ring.

• Bleed the air from the steering hydraulic system before starting engine. Refer to 

ST-6, "Air Bleeding Hydrau-

lic System"

.

• 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 Alignment"

.

• After adjusting wheel alignment, adjust neutral position of the

steering angle sensor (if equipped with VDC). Refer to 

BRC-124,

"ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Special Repair Requirement"

.

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 OIL PUMP

ST-17

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POWER STEERING OIL PUMP

Component

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QR25DE

AWGIA0197GB

1.

Joint

2.

Suction pipe

3.

O-ring

4.

Front bracket

5.

Pulley

6.

Lock washer

7.

Body assembly

8.

Copper sealing washers

9.

Flow control valve and spring

10. Connector

11. Rear bracket

Apply Genuine Nissan PSF or equivalent

ST-18

< REMOVAL AND INSTALLATION >

POWER STEERING OIL PUMP

VQ40DE

Removal and Installation

INFOID:0000000009479924

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. Drain the power steering fluid from the reservoir tank.
2. On VQ40DE model, remove the engine room cover. Refer to 

EM-140, "Removal and Installation"

.

3. On VQ40DE model, remove cooling fan assembly. Refer to 

CO-48, "Removal and Installation (Motor

driven type)"

 (VQ40DE).

4. Remove the air duct assembly. Refer to 

EM-25, "Exploded View"

 (QR25DE), 

EM-141, "Exploded View"

(VQ40DE).

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

EM-14,

"Removal and Installation"

 (QR25DE), 

EM-129, "Removal and Installation"

 (VQ40DE).

6. Disconnect the harness connector from pressure sensor.
7. Remove the high pressure and low pressure piping from the power steering oil pump. Refer to 

ST-20,

"Removal and Installation"

.

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

INSTALLATION

Installation is in the reverse order of removal. 

AWGIA0137GB

1.

Joint

2.

Suction pipe

3.

O-ring

4.

Front bracket

5.

Pulley

6.

Lock washer

7.

Body assembly

8.

Copper sealing washers

Apply Genuine Nissan PSF or equivalent