Infiniti G37 Coupe. Manual - part 1233

ST-32

< ON-VEHICLE REPAIR >

STEERING GEAR AND LINKAGE

15. Adjust inner socket to standard length “L”, and then tighten lock

nut to the specified torque. Check length “L” again after tighten-
ing lock nut.

CAUTION:

Adjust toe-in after this procedure. The length achieved after
toe-in adjustment is not necessary the above value.

Inspection

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INSPECTION AFTER INSTALLATION

• Check if steering wheel turns smoothly when it is turned several times fully to the end of the left and right.
• Check the steering wheel play, neutral position steering wheel, steering wheel turning force, and front wheel

turning angle. Refer to 

ST-12, "Inspection"

.

• Check the fluid level, fluid leakage, and air bleeding hydraulic system. Refer to 

ST-10, "Inspection"

.

• Perform 4WAS front actuator neutral position adjustment. Refer to 

STC-27, "4WAS FRONT ACTUATOR

NEUTRAL POSITION ADJUSTMENT : Description"

.

INSPECTION AFTER DISASSEMBLY

Boot

• Check boot for cracks, and replace it if a malfunction is detected.

Rack Assembly

• Check rack for damage or wear, and replace it if a malfunction is detected.

Gear-Sub Assembly

• Check gear-sub assembly for damage or wear, and replace it if a malfunction is detected.
• Rotate gear-sub assembly and check for torque variation or rattle, and replace it if a malfunction is detected.

Gear Housing Assembly

• Check gear housing assembly for damage and scratches (inner wall). Replace if there are.

Outer Socket and Inner Socket

• Check the following items and replace the component if it does not meet the standard.

BALL JOINT SWINGING TORQUE

• Hook a spring balance at the point shown in the figure and pull the

spring balance. Make sure that the spring balance reads the spec-
ified value when ball stud and inner socket start to move. Replace
outer socket and inner socket if they are outside the standard.

BALL JOINT ROTATING TORQUE

Standard

Inner socket length “L”

: Refer to 

ST-49, "Inner 

Socket Length"

.

SGIA0167E

Standard for outer socket

(Measuring point: Stud cotter pin mounting hole)

Spring balance measure-
ment

: Refer to 

ST-48, "Socket 

Swing Force and Rotating 
Torque"

.

Standard for inner socket

(Measuring point: “*” mark shown in the figure)

Spring balance measure-
ment

: Refer to 

ST-48, "Socket 

Swing Force and Rotating 
Torque"

.

SGIA0896E

STEERING GEAR AND LINKAGE

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• Make sure that the reading is within the following specified range

using preload gauge (A) [SST: ST3127S000 (J-25765-A)]. Replace
outer socket if the reading is outside the specified value.

BALL JOINT AXIAL END PLAY

• Apply an axial load of 490 N (50 kg, 110 lb) to ball stud. Using a

dial gauge, measure amount of stud movement, and then make
sure that the value is within the following specified range. Replace
outer socket (1) and inner socket (2) if the measured value is out-
side the standard.

Standard

Outer socket rotating 
torque

: Refer to 

ST-48, "Socket 

Swing Force and Rotating 
Torque"

.

SGIA1382E

Standard

Outer socket

: Refer to 

ST-49, "Socket Axial 

End Play"

.

Inner socket

: Refer to 

ST-49, "Socket Axial 

End Play"

.

JSGIA0109ZZ

ST-34

< ON-VEHICLE REPAIR >

POWER STEERING OIL PUMP

POWER STEERING OIL PUMP

EXCEPT FOR SPORT MODELS

EXCEPT FOR SPORT MODELS : Exploded View

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REMOVAL AND INSTALLATION

DISASSEMBLY AND ASSEMBLY

1.

Power steering oil pump

2.

Bracket

: Vehicle front

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSGIA0046GB

1.

Pulley

2.

Oil seal

3.

Bracket

4.

Body assembly

5.

Suction pipe

6.

O-ring 

JSGIA0103GB

POWER STEERING OIL PUMP

ST-35

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EXCEPT FOR SPORT MODELS : Removal and Installation

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REMOVAL

1.

Drain power steering fluid from reservoir tank.

2.

Remove the right half of the air cleaner and the right half of the air duct. Refer to 

EM-26, "Exploded View"

.

3.

Loosen drive belt. Refer to 

EM-25, "Exploded View"

.

4.

Remove drive belt from oil pump pulley.

5.

Remove copper washers and eye bolt (drain fluid from their pipings).

6.

Remove suction hose (drain fluid from their pipings).

7.

Remove oil pump mounting bolts, and then remove oil pump.

INSTALLATION

Note the following, and install in the reverse order of removal.
• When installing suction hoses (1), refer to the figure.

CAUTION:

• Never apply fluid to the hose (1) and tube (2).
• Insert hose securely until it contacts spool (A) of tube.
• Install clamp (3) to the hose at 3 – 8 mm (0.12 – 0.31 in) (L)

from the edge of the hose.

• When installing eye bolt (1) and copper washer (2) to oil pump (3),

refer to the figure.

CAUTION:

• Never reuse copper washer.
• Apply power steering fluid to around copper washer, then

install eye-bolt.

• Install eye-bolt with eye-joint (assembled to high pressure

hose) (B) protrusion (A) facing with pump side cutout, and
then tighten it to the specified torque after tightening by
hand. Refer to 

ST-45, "Exploded View"

.

• Securely insert harness connector to pressure sensor.

• Adjust belt tension. Refer to 

EM-12, "Tension Adjustment"

.

• Check fluid level, fluid leakage and air bleeding hydraulic system after the installation. Refer to 

ST-10,

"Inspection"

.

EXCEPT FOR SPORT MODELS : Disassembly and Assembly

INFOID:0000000001666246

DISASSEMBLY

1.

Remove rear cover mounting bolts, and then remove rear cover from body assembly.

CAUTION:

• Fix oil pump with a vise if necessary.

7.

Flow control valve B assembly

8.

Flow control valve spring

9.

Flow control valve A

10. Dowel pin

11.

Front side plate

12. Vane

13. Rotor

14. Rotor snap ring

15. Cam ring 

16. Rear side plate

17. O-ring

18. Teflon ring

19. O-ring

20. Rear cover

21. Cartridge

A: Oil seal lip

: Apply power steering fluid.

: Apply multi-purpose grease.

Refer to 

GI-4, "Components"

 for symbols not described on the above.

JSGIA0118ZZ

SGIA1379E