Infiniti G37 Coupe. Manual - part 1227

ST-8

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PREPARATION

PREPARATION

PREPARATION

Special Service Tools

INFOID:0000000001666217

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number
(Kent-Moore No.)
Tool name

Description

ST27180001
(J-25726-A)
Steering wheel puller

Removing steering wheel

ST3127S000
(J-25765-A)
Preload gauge

Inspecting sliding torque, steering torque, and 
rotating torque for ball joint

KV48103400
(

—

)

Preload adapter

Inspecting rotating torque

ST35300000
(

—

)

Drift
a: 45.1 mm (1.776 in) dia.
b: 59.0 mm (2.323 in) dia.

Installing oil pump oil seal (Except for 4WAS 
models)

KV48103500
(J-26357)
Oil pressure gauge

Measuring oil pump relief pressure

KV48102500
(J-33914)
Oil pressure gauge adapter

Measuring oil pump relief pressure

S-NT544

ZZA0806D

ZZA0824D

ZZA0881D

S-NT547

S-NT542

PREPARATION

ST-9

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Commercial Service Tools

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Tool number
Tool name

Description

Power tool

Loosening bolts and nuts

PBIC0190E

ST-10

< ON-VEHICLE MAINTENANCE >

POWER STEERING FLUID

ON-VEHICLE MAINTENANCE

POWER STEERING FLUID

Inspection

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FLUID LEVEL

1.

Check fluid level with engine stopped.

2.

Ensure that fluid level is between MIN and MAX.

3.

Fluid levels at HOT and COLD are different. Do not confuse
them.

CAUTION:

• The fluid level should not exceed the MAX line. Excessive fluid causes fluid leakage from the

cap.

• Never reuse drained power steering fluid.

FLUID LEAKAGE

• Check hydraulic connections for fluid leakage, cracks, damage,

looseness, or wear.

1.

Run engine until the fluid temperature reaches 50 to 80

°

C (122

to 176

°

F) in reservoir tank, and keep engine speed idle.

2.

Turn steering wheel several times from full left stop to full right
stop.

3.

Hold steering wheel at each lock position for five seconds and
carefully, check for fluid leakage.

CAUTION:

Never hold the steering wheel in a locked position for more
than 10 seconds. (There is the possibility that power steer-
ing oil pump assembly may be damaged.)

4.

If fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not overtighten con-
nector as this can damage O-ring, washer and connector.

5.

If fluid leakage from oil pump is noticed, check oil pump. Refer to 

ST-38, "EXCEPT FOR SPORT MOD-

ELS : Inspection"

 (Except for sport models), 

ST-43, "SPORT MODELS : Inspection"

 (Sport models).

6.

Check steering gear boots for accumulation of fluid indicating from steering gear.

AIR BLEEDING HYDRAULIC SYSTEM

If air bleeding is not complete, the following symptoms can be observed.
• Bubbles are created in reservoir tank.
• Clicking noise can be heard from oil pump.
• Excessive buzzing in the oil pump.

NOTE:
Fluid noise may occur in the steering gear or oil pump. This does not affect performance or durability of the
system.

1.

Turn steering wheel several times from full left stop to full right stop with engine off.

CAUTION:

Fill reservoir tank with a sufficient amount of fluid so that fluid level is not below the MIN line while
turning steering wheel.

2.

Start engine and hold steering wheel at each lock position for 3 seconds at idle to check for fluid leakage.

HOT

: Fluid temperature 50 – 80

°

C (122 – 176

°

F)

COLD

: Fluid temperature 0 – 30

°

C (32 – 86

°

F)

Recommended fluid

: Refer to 

MA-10, "Fluids 

and Lubricants"

.

Fluid capacity

: Refer to 

ST-47, "General 

Specifications"

.

PGIA0007J

SGIA0506E

POWER STEERING FLUID

ST-11

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3.

Repeat step 2 above several times at approximately 3 seconds intervals.

CAUTION:

Never hold the steering wheel in a locked position for more than 10 seconds. (There is the possi-
bility that oil pump may be damaged.)

4.

Check fluid for bubbles and while contamination.

5.

Stop engine if bubbles and white contamination do not drain out. Perform step 2 and 3 above after waiting
until bubbles and white contamination drain out.

6.

Stop the engine, and then check fluid level.