Infiniti F50. Manual - part 707

POWER STEERING GEAR AND LINKAGE

PS-17

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Component 

EGS00074

SGIA0663E

PS-18

POWER STEERING GEAR AND LINKAGE

Disassembly and Assembly

EGS00075

DISASSEMBLY

●

Secure power steering gear in a vise, using copper plates or
something similar to prevent it from being damaged. Do not grip
cylinder in a vise.

●

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

1.

Remove EPS solenoid valve assembly.

CAUTION:

Do not attempt to disassemble EPS solenoid valve.

2.

Remove cylinder tube from gear housing assembly.

3.

Remove rear cover cap from gear sub-assembly.

4.

Remove adjusting screw and lock nut along with spring and retainer from gear housing assembly.

5.

Remove gear sub-assembly from gear housing assembly.

CAUTION:

Do not attempt to disassemble gear sub-assembly. 

6.

Remove nuts, outer socket and boot.

CAUTION:

When removing boot, be careful not to scratch or damage
inner socket or gear housing assembly. If any damage is
found, replace inner socket and gear housing assembly.
Otherwise, oil leaks may result.

7.

Move spacer ring to rack and raise two crimped areas (at point
A) of lock plate. Loosen and remove inner socket from rack.

CAUTION:

When removing lock plate from rack, be careful not to dam-
age the rack surface. If it is damaged, replace rack. Other-
wise, oil leaks may result.

8.

Remove lock plate and spacer ring from rack.

9.

Use a 3 mm (0.12 in) drill bit to remove punch-crimped area on
end cover assembly installation side of gear housing assembly.
Scoop out the area approximately 1.5 mm (0.059 in) deep.

10. Using a 42 mm (1.65   in) open head wrench, remove end cover

assembly.

11. Remove rack and rack oil seal (outer) from gear housing assem-

bly.

CAUTION:

Be careful not to damage inner surface of gear housing
assembly and rack. If any damage is given, replace gear
housing assembly and rack. Otherwise, oil leaks may
result.

12. Heat rack Teflon ring to approximately 40

°

C (104

°

F) with a dryer

and remove Teflon ring and O-ring from rack.

CAUTION:

Be careful not to damage rack. If it is damaged, replace rack. Otherwise, oil leaks may result.

SGIA0056E

SGIA0019E

STC0013D

SST052C

POWER STEERING GEAR AND LINKAGE

PS-19

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13. Push the inside of center bushing with a brass bar to remove

center bushing and rack oil seal (inner) from gear housing
assembly.

CAUTION:

Be careful not to damage the inside of gear housing assem-
bly. If it is damaged, replace gear housing assembly. Other-
wise, oil leaks may result.
INSPECTION AFTER DISASSEMBLY

PINION ROTATING TORQUE ADJUSTMENT

1.

Set gears in the neutral position with out fluid in gear.

2.

Cost adjusting screw with locking sealant and screw it in.

3.

Lightly tighten lock nut.

4.

Tighten adjusting screw to a torque of 5.0 to 5.8 N·m (0.5 to 0.6
kg-m, 45 to 51 in-lb).

5.

Move rack over its entire stroke ten times.

6.

Measure pinion rotating torque within the range of 180 degrees
from neutral position, using Tools. Stop gear at the point of max-
imum torque.

7.

Loosen adjusting screw and retighten it to 5.0 to 5.8 N·m (0.5 to
0.6 kg-m, 45 to 51 in-lb). Then, loosen adjusting screw 60 to 80
degrees.

INSPECTION AFTER DISASSEMBLY
Boot

Check condition of boot. If it is torn or deformed, replace boot.

Rack 

Check rack for wear or damage. Replace if necessary.

Gear Sub-Assembly

●

Check pinion gear for damage or wear. Replace gear sub-assembly, if necessary.

●

Check bearing while rotating it. If bearing ball lace is dented, worn out, or damaged, replace gear sub-
assembly.

Gear Housing Cylinder 

Check gear housing cylinder for damage or internal scratch. Replace gear housing assembly.

SST472A

SST742C

SST683C

PS-20

POWER STEERING GEAR AND LINKAGE

Tie Rod Inner And Outer Sockets

●

Check ball joint for swinging force. 

Hook a spring balance at the point shown in the figure. Confirm that
reading observed when ball stud and inner socket start moving is
within the specification. If reading is outside the specification,
replace socket.

●

Check ball joint for rotating torque.

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Using Tool, confirm that reading is within the specification shown
below. If it is outside the specification, replace socket.

●

Check ball joint for axial end play.

●

Apply pressure of 490 N (50 kg,110 lb) to ball stud axially and
measure distance that stud travels. If the reading is outside the
specification shown below, replace socket.

●

Check condition of dust cover. If cracked excessively, replace
socket.

Cylinder tubes
Check cylinder tubes for scratches or other damage. Replace if nec-
essary.

ASSEMBLY

1.

Install O-ring.

CAUTION:

Always use a new O-ring.

2.

Heat a new rack Teflon ring to 40

°

C (104

°

F) with a head gun.

CAUTION:

Always use a new rack Teflon ring.

Outer socket

Inner socket

Swinging 

force

4.81 - 45.7 N

(0.49 - 4.67 kg,

 1.08 - 10.32 lb)

8.9 - 64 N·m

(0.91 - 6.5 kg·m,

79 - 655 in-lb) 

(point indicated by arrow)

SST333B

Outer socket

Rotating torque : 0.3 - 2.9 N·m (0.03 - 0.29 kg-m, 3 - 25 i n-lb)

SST882B

Outer socket

: 0.5 mm (0.02 in) or less

Inner socket

: 0.2 mm (0.008 in) or less

SGIA0057E

SST083B