Infiniti M45 (Y34). Manual - part 707

POWER STEERING GEAR AND LINKAGE

PS-19

Specified value

Rotating Torque (outer socket only)

●

Using a preload gauge (special service tool), check if reading
is within the range specified below. If value is outside stan-
dard, replace outer sockets.

Specified value

Axial End Play

●

Apply load of 490 N (50 kg, 110 lb) to ball stud axially. Use a
dial gauge to measure amount of the movement that the stud
makes. Check if reading is within range specified below. If
not, replace outer and inner sockets.

ASSEMBLY

Put an O-ring into rack.
NOTE:
Do not reuse rack O-ring.

Heat rack Teflon ring to approximately 40

C (104

F) with a

dryer. Assemble it to rack.

NOTE:
Do not reuse rack Teflon ring.

To fit Teflon ring on rack, use Teflon ring installation tool from
tooth side. Compress the rim of ring with tool. Then, put O-ring
on Teflon ring.

Item

Outer socket

Inner socket

Measuring point

Cotter pin hole of stud

Shown as L: 60.5 mm (2.38 in)

Swing torque

0.3 - 2.9 N·m

(0.03 - 0.29 kg-m, 3 - 25 in-lb)

1.0 - 7.8 N·m

(0.10 - 0.80 kg-m, 9 - 69 in-lb)

Measuring value

4.42 - 42.7 N (0.45 - 4.4 kg, 1.0 - 9.7 lb)

10 - 78 N (1.1 - 7.9 kg, 2.25 - 17.5 lb)

Rotating torque

0.3 - 2.9 N·m (0.03 - 0.29 kg-m, 3 - 25 in-lb)

SST882B

Outer socket

0.5 mm (0.020 in) or less

Inner socket

0.2 mm (0.008 in) or less

SGIA0057E

SGIA0153E

SGIA0154E

PS-20

POWER STEERING GEAR AND LINKAGE

Insert rack oil seal.

NOTE:
Do not reuse rack oil seal.

To avoid damaging inner rack oil seal, wrap an OHP sheet
[approx. 70 mm (2.76 in)

100 mm (3.94 in)] around rack tooth.

Place oil seal on sheet. Then, pull oil seal along with OHP sheet
until they pass the toothed section of rack, then remove it.

Insert rack oil seal (inner) to piston (rack Teflon ring) position
and push retainer to adjusting screw side with fingers lightly, and
then make rack move in gear housing assembly, install rack oil
seal (inner) to fit in with gear housing assembly.

CAUTION:

●

When inserting rack assembly, do not damage retainer
sliding part. If it is damaged, replace gear housing
assembly.

●

When inserting rack assembly, do not damage cylinder
inner wall. If it is damaged, it may cause oil leak. Replace
gear housing assembly.

When installing outer rack oil seal, end cover of rack with an
OHP sheet [70 mm (2.76 in)

100 mm (3.94 in)]. It will avoid

damaging rack oil seal. Then place oil seal on sheet. Pull rack oil
seal along with OHP sheet until they pass the rack end. Install
rack oil seal in place using end cover assembly. Then remove
OHP sheet.

Install end cover, move rack to gear housing assembly.

Attach rack oil seal. Both inner lip and outer lip should face each
other.

Using a 42 mm (1.65 in) open head (suitable tool), tighten end
cover assembly at the specified torque.

NOTE:
Do not damage rack surface. If it is damaged, it may cause oil
leak. Replace rack assembly.

SGIA0155E

SGIA0156E

SGIA0157E

SGIA0205E

Tightening torque:

58.9 - 73.5 N·m (6.0 - 7.4 kg-m, 44 - 54 ft-lb)

SST081B

POWER STEERING GEAR AND LINKAGE

PS-21

After tightening end cover, caulk cylinder at one point as shown
in the figure using a punch. This will prevent end cover from get-
ting loose.

Assemble an O-ring to gear housing assembly.

NOTE:
Do not reuse O-ring.

Install sub-gear assembly to gear housing assembly, then
tighten bolts at the specified torque.

Decide neutral position of rack gear.

10. Install the projection part (Tip) of rear cover cap to sub-gear

assembly as shown in the figure.

11. Apply thread locking adhesive (Three Bond TB1111B or equiva-

lent) to the thread of adjusting screw, and screw it to the projec-
tion height from gear housing assembly. The projection height is
the same as it was measured in the overhaul in advance.

12. Rotate ten times throughout whole range of pinion so that parts

fit with each other.

SGIA0158E

Tightening torque:

15.7 - 20.5 N·m (1.6 - 2.0 kg-m, 12 - 15 ft-lb)

SGIA0408E

Rack stroke “L”

: 60mm (2.36 in)

STC0034D

SGIA0402E

SGIA0380E

PS-22

POWER STEERING GEAR AND LINKAGE

13. Measure pinion rotation torque within from -180

to +180

make

preload gauge (special service tool) turn at the speed of 2 - 3
rpm in the rack neutral position, then hold preload gauge (spe-
cial service tool) at maximum torque.

14. After loosening adjusting screw once, tighten it again with torque

of 4.9 - 5.9 N·m (0.50 - 0.60 kg-m, 44 - 52 in-lb). Furthermore
loosen it within from 20

to 40

15. Measure pinion rotation torque with preload gauge (special ser-

vice tool), then confirm whether its reading is within specified
range. If reading is not within specified range, readjust screw
angle with adjusting screw. Replace gear assembly with new
one, if reading is still not within specified range or rotation torque
of adjusting screw is less than 5 N·m (0.51 kg-m, 44 in-lb).

16. Turn pinion fully to end of left with tie-rods to rack.

17. Set dial gauge to rack as shown in the figure. Measure vertical

movement of rack when pinion is turned counterclockwise with
torque of 19.6 N·m (2.0 kg-m, 14 ft-lb). Check reading is within
specified range. If reading is outside of specification, readjust
screw angle with adjusting screw. If reading is still outside of
specification, or if the rotation torque of adjusting screw is less
than 5 N·m (0.51 kg-m, 44 in-lb), replace steering gear assem-
bly.

18. Install boot of large-diameter side to gear housing assembly.

19. Install boot of small-diameter side to inner socket boot mounting

groove.

20. Install boot clamp to small-diameter side of boot.

SGIA0483E

Pinion rotation torque:

Around neutral position (within

100

)

Average “A”:

0.8 - 2.0 N·m (0.09 - 0.20 kg-m, 7 - 17 in-lb)

Other than above (more than

100

)

Maximum variation “B”:

2.3 N·m (0.23 kg-m, 20 in-lb)

SGIA0160E

SGIA0484E

Amount of vertical

movement with rack

Less than 0.265 mm (0.010 in)

Measuring point

Shaft direction of rack

5 mm (0.197 in) away from end of gear housing

Radius direction of
rack

Shaft direction of adjusting screw

SGIA0374E

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