Infiniti M35/M45 Y50. Manual - part 1001

POWER STEERING GEAR AND LINKAGE

PS-19

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POWER STEERING GEAR AND LINKAGE

PFP:49001

Removal and Installation

NGS000DC

COMPONENTS

CAUTION:

Spiral cable may be cut if steering wheel turns while separating steering column assembly and steer-
ing gear assembly. Be sure to secure steering wheel using string to avoid turning.

REMOVAL

1.

Set vehicle to the straight-ahead position.

2.

Remove tires from vehicle with a power tool.

3.

Remove undercover from vehicle with a power tool.

4.

Remove lower side fixing bolt of lower joint.

5.

Remove cotter pin (1), and then loosen the nut.

6.

Remove steering outer socket (2) from steering knuckle (3) so
as not to damage ball joint boot (4) using the ball joint remover
(suitable tool).

CAUTION:

Temporarily tighten the nut to prevent damage to threads
and to prevent the ball joint remover from suddenly coming
off.

7.

Remove high and low pressure piping of hydraulic piping, and
then drain power steering fluid. Refer to 

PS-39, "HYDRAULIC

LINE"

 .

1.

Cotter pin

2.

Steering gear assembly 

3.

Steering gear assembly
(AWD models)

Refer to 

GI-11, "Components"

 , for the symbols in the figure.

SGIA1387E

SGIA0844E

SGIA1183E

PS-20

POWER STEERING GEAR AND LINKAGE

8.

Remove steering hydraulic piping bracket from front suspension member. Refer to 

PS-39, "HYDRAULIC

LINE"

 .

9.

Remove power steering solenoid valve harness connector. Refer to 

PS-21, "COMPONENTS"

 .

10. Remove rack stay (2WD) or front cross bar (AWD). Refer to 

FSU-8, "Components"

 , 

FSU-26, "Compo-

nents"

 .

11. Remove mounting bolts and nuts of steering gear assembly, and then remove steering gear assembly

from vehicle.

INSTALLATION

Installation is the reverse order of removal. For tightening torque, refer to 

PS-19, "COMPONENTS"

 .

●

When installing lower joint to steering gear assembly, follow the procedure listed below.

–

Set rack of steering gear in the neutral position.

NOTE:
To get the neutral position of rack, turn gear-sub assembly and measure the distance of inner socket, and
then measure the intermediate position of the distance.

–

Align rear cover cap projection (A) with the marking position (B)
of gear housing assembly.

–

Install slit part of lower joint (C) aligning with the projection (A) of
rear cover cap (1). Make sure that the slit part of lower joint (C)
is aligned with both the projection (A) of rear cover cap (1) and
the marking position (B) of gear housing assembly.

●

After installation, bleed air from the steering hydraulic system.
Refer to 

PS-8, "Air Bleeding Hydraulic System"

 .

●

Perform final tightening of nuts and bolts on each part under
unladen conditions with tires on level ground when removing
steering gear assembly. Check wheel alignment. Refer to 

FSU-

6, "Wheel Alignment Inspection"

 , 

FSU-24, "Wheel Alignment

Inspection"

 .

●

Adjust neutral position of steering angle sensor after checking wheel alignment. Refer to 

BRC-6, "Adjust-

ment of Steering Angle Sensor Neutral Position"

 .

INSPECTION AFTER INSTALLATION

Make sure that steering wheel operates smoothly by turning several times from full left stop to full right stop.

SGIA1175E

POWER STEERING GEAR AND LINKAGE

PS-21

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Disassembly and Assembly

NGS000DD

COMPONENTS

CAUTION:

●

Disassemble and assemble steering gear assembly by securing the mounting area in a vise using
copper plates.

●

Clean steering gear assembly with kerosene before disassembling. Be careful to avoid splashing
or applying any kerosene over connector of discharge port or return port.

1.

Outer socket

2.

Boot clamp

3.

Boot

4.

Inner socket

5.

Boot clamp (stainless wire)

6.

End cover assembly

7.

Rack oil seal

8.

Rack Teflon ring

9.

O-ring

10.

Rack assembly

11.

Gear housing assembly

12.

Cylinder tubes

13.

O-ring

14.

Gear-sub assembly

15.

power steering solenoid valve

16.

Rear cover cap

Refer to 

GI-11, "Components"

 , and the followings for the symbols in the figure.

: Apply power steering fluid.

: Apply Genuine Liquid Gasket, Three Bond 1111B or equivalent.

: Apply multi-purpose grease.

SGIA1388E

PS-22

POWER STEERING GEAR AND LINKAGE

DISASSEMBLY

1.

Remove fixing bolts of power steering solenoid valve, and then remove power steering solenoid valve
from gear-sub assembly.

2.

Remove cylinder tubes from gear housing assembly.

3.

Remove rear cover cap from gear-sub assembly.

4.

Measure adjusting screw height “H”, and loosen adjusting
screw.

CAUTION:

●

Do not loosen adjusting screw 2 turns or more.

●

Replace steering gear assembly if adjusting screw is
loosened 2 turns or more and it is removed.

5.

Remove fixing bolts of gear-sub assembly, and then remove
gear-sub assembly from gear housing assembly.

6.

Remove O-ring from gear housing assembly.

7.

Loosen outer socket lock nut, and remove outer socket.

8.

Remove boot clamp, and then remove boot from inner socket.

CAUTION:

Do not damage inner socket and gear housing assembly when removing boot. Inner socket and
gear housing assembly must be replaced if inner socket and gear housing assembly are damaged
because it may cause foreign material interfusion.

9.

Remove inner socket from gear housing assembly.

10. Drill out the clinching part of gear housing assembly (end cover

assembly side) outer rim with a 3 mm (0.12 in) drill bit. [Drill for
approximately 1.5 mm (0.059 in) depth.] 

11. Remove end cover assembly with a 36 mm (1.42 in) open head

(suitable tool).

CAUTION:

Do not damage rack assembly surface when removing.
Rack assembly must be replaced if damaged because it
may cause fluid leakage.

12. Pull rack assembly together with rack oil seal (outer side) out

from gear housing assembly.

CAUTION:

Do not damage cylinder inner wall when removing rack
assembly. Gear housing assembly must be replaced if dam-
aged because it may cause fluid leakage.

13. Heat rack Teflon ring to approximately 40

°

C (104

°

F) with a

dryer, and remove rack Teflon ring and O-ring from rack assem-
bly.

CAUTION:

Do not damage rack assembly. Rack assembly must be
replaced if damaged because it may cause fluid leakage.

SGIA0624E

STC0013D

SST081B

SGIA0151E