Infiniti QX56 (Z62). Manual - part 1255

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< PERIODIC MAINTENANCE >

POWER STEERING FLUID

PERIODIC 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.
• Always use the specified fluid. Refer to 

MA-10, "Fluids and Lubricants"

.

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-52, "Inspection"

.

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-57, "General 

Specifications"

.

SGIA0232J

SGIA0506E

POWER STEERING FLUID

ST-31

< PERIODIC MAINTENANCE >

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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.

ST-32

< PERIODIC MAINTENANCE >

STEERING WHEEL

STEERING WHEEL

Inspection

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STEERING WHEEL AXIAL END PLAY

1.

Check installation conditions of steering gear assembly, front suspension assembly, axle and steering col-
umn assembly.

2.

Check if movement exists when steering wheel is moved up and down, to the left and right and to the axial
direction.

3.

Check the following items when steering wheel axial end play is out of the standard.
• Check the steering column assembly mounting condition. Refer to 

ST-34, "Exploded View"

.

• Check steering gear assembly mounting condition for looseness. Refer to 

ST-41, "Exploded View"

.

STEERING WHEEL PLAY

1.

Turn steering wheel so that front wheels come to the straight-ahead position.

2.

Start engine and lightly turn steering wheel to the left and right until front wheels start to move.

3.

Measure steering wheel movement on the outer circumference.

4.

Check the following items when steering wheel play is out of the standard.
• Check backlash for each joint of steering column assembly.
• Check installation condition of steering gear assembly.

Steering wheel axial end play

: Refer to 

ST-57, "Steering Wheel Axial End Play and Play"

.

Steering wheel play

: Refer to 

ST-57, "Steering Wheel Axial End Play and Play"

.

STEERING WHEEL

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< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

STEERING WHEEL

Exploded View

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Removal and Installation

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REMOVAL

NOTE:
When reconnecting spiral cable, fix cable with a tape so that fixing case and rotating part keep aligned. This
will omit neutral position alignment procedure during spiral cable installation.

1.

Set vehicle to the straight-ahead position.

2.

Remove driver air bag module. Refer to 

SR-11, "Removal and Installation"

.

3.

Remove steering wheel lock nut after steering is locked.

4.

Remove steering wheel with the steering wheel puller (A) [SST:
ST27180001 (J-25726-A)].

INSTALLATION

Note the following, and install in the reverse order of removal.

CAUTION:

Never twist spiral cable freely on excessively after it becomes tight (doing so may cause the cable to
tear off).
NOTE:
Check the spiral cable neutral position after replacing or rotating spiral cable. Refer to 

SR-14, "Removal and

Installation"

.

1.

Steering wheel

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSGIA0704GB

JSGIA0711ZZ