Infiniti M45 (Y34). Manual - part 706

POWER STEERING GEAR AND LINKAGE

PS-15

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INSTALLATION

In following items with care, install components in reverse order of
removal. Refer to 

PS-13, "Removal and Installation"

 .

●

Confirm rear cover cap on steering gear consists with steering
gear when front wheels are set in straight ahead direction as
shown in figure.

●

Tighten steering gear assembly as shown in figure.

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Confirm if slit of lower yoke of lower joint fits with projection on
rear cover cap.

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After installation, bleed air from piping. Refer to 

PS-6, "Air

Bleeding from Hydraulic System"

 .

INSPECTION AFTER INSTALLATION

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Check if steering wheel turns smoothly when it is turned several times fully to end of left and right.

SGIA0402E

SGIA0404E

SGIA0392E

PS-16

POWER STEERING GEAR AND LINKAGE

Disassembly and Assembly

AGS000DY

SGIA1161E

POWER STEERING GEAR AND LINKAGE

PS-17

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NOTE:

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Secure steering gear with a vise, using copper plates or some-
thing similar to prevent it from being damaged. Do not grip cylin-
der with a vise.

●

Before performing disassembly, clean power steering gear with
kerosene. Be careful not to bring any kerosene into contact with
the discharge and return port connectors.

DISASSEMBLY

1.

Remove EPS solenoid valve assembly.

2.

Remove O-ring from gear housing assembly.

3.

Remove cylinder tubes from gear housing assembly.

4.

Remove rear cover cap from sub-gear assembly.

5.

Measure projection height of adjusting screw from gear housing,
then loosen adjusting screw.

NOTE:

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Do not attempt to disassemble EPS solenoid valve.

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Do not turn adjusting screw more than twice.

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Replace steering gear assembly when adjusting screw is
removed or is turned more than twice.

6.

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

NOTE:
Do not overhaul sub-gear assembly because it is non-overhaul
part. If there is something wrong with sub-gear assembly, replace with new one.

7.

Loosen lock nut, and remove outer socket. 

8.

Remove boot clamps of small diameter side and large diameter side, then remove boots.

NOTE:
On removing boots, be careful not to damage inner socket and gear housing assembly. If they are dam-
aged, replace them to avoid oil leaks.

9.

Remove inner socket from rack.

10. Drill out the punch caulking area on cylinder outer rim with a 3

mm (0.12 in) drill bit. [Drill for approx. 1.5 mm (0.059 in) in
depth.]

11. Remove end cover with a 42 mm (1.65 in) open head (special

service tool).
NOTE:
Be careful not to damage rack. If it is damaged, replace rack.
Otherwise, oil leaks may result.

12. Pull rack assembly with rack oil seal out of gear housing assem-

bly.

1.

Outer socket

2.

Cotter pin

3.

Inner socket 

4.

Boot clamp

5.

Boot

6.

Boot clamp (wire)

7.

End cover assembly 

8.

Rack oil seal (outer)

9.

Rack Teflon ring

10. Rack assembly

11.

O-ring

12. Rack oil seal inner

13. Gear housing

14. Clip

15. Cylinder tubes

16. Copper washer

17. EPS solenoid valve

18. Rear cover cap

19. Sub-gear assembly

SGIA0406E

SGIA0150E

STC0013D

PS-18

POWER STEERING GEAR AND LINKAGE

13. Heat the rack Teflon ring to approx. 40

°

C (104

°

F) with a dryer,

then remove it and O-ring from rack.

NOTE:
Be careful not to damage rack. If it is damaged, replace with
new one to avoid oil leaks. 

14. Use a taped 29 mm (1.14 in) socket and an extension bar, push

out and remove rack oil seal together from gear housing assem-
bly.
NOTE:

●

Be careful not to damage gear housing assembly and cylinder
inner wall.

●

If it is damaged, gear housing assembly must be replaced.
Otherwise, oil leaks will result.

INSPECTION AFTER DISASSEMBLY
Boot

Check boot for gear, wrinkle and deformation. Replace it, if necessary.

Rack 

Check rack gear for damage and wear. Replace it, if necessary.

Sub-Gear Assembly

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Check pinion gear for damage and wear, if damage is found, replace with a new sub-gear assembly.

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Check bearing while at rotating with noise, and then check bearing ball race with dent, worn, or damaged.
If any damage is found, replace with a new sub-gear assembly. 

Gear Housing Assembly 

Check gear housing assembly for damage and scratch (inner wall). Replace it, if necessary.

Outer Socket and Inner Socket

1.

Swing Torque

●

Hook a spring balance at the point shown in the figure. Con-
firm if the reading is within specification, when ball stud and
inner socket start moving. If reading is outside specification,
replace socket. 

SGIA0151E

SGIA0179E

SGIA0493E