Infiniti QX4 (R50). Manual — part 515
SPD554
6.
Install differential case assembly on ring gear.
7.
Apply locking agent [Locktite (stud lock) or equivalent] to ring
gear bolts, and install them.
Tighten bolts in a criss-cross pattern, lightly tapping bolt head
with a hammer.
PD353
8.
Press-fit side bearing inner cones on differential case with Tool.
Tool number:
A KV38100300 (J25523)
B ST33061000 (J8107-2)
SPD679
FINAL DRIVE HOUSING
NBPD0021S03
1.
Press-fit front and rear bearing outer races with Tools.
Tool number:
A ST30611000 (J25742-1)
B ST30621000 (J25742-5)
C ST30613000 (J25742-3)
SPD377
2.
Select drive pinion height adjusting washer and pinion bearing
adjusting washer. Refer to “PINION GEAR HEIGHT AND PIN-
ION BEARING PRELOAD”, PD-25.
3.
Install drive pinion height adjusting washer in drive pinion, and
press-fit pinion rear bearing inner cone in it, using press and
Tool.
Tool number:
ST30901000 (J26010-01)
FRONT FINAL DRIVE
R200A
Assembly (Cont’d)
PD-32
SPD581
4.
Place pinion front bearing inner cone in final drive housing.
SPD680
5.
Apply multi-purpose grease to cavity at sealing lips of oil seal.
Install front oil seal.
Tool number:
KV38100500 (J25273)
SPD658
6.
Place drive pinion bearing spacer, drive pinion bearing adjust-
ing washer and drive pinion in final drive housing.
SPD681
7.
Insert companion flange into drive pinion by tapping the com-
panion flange with a soft hammer.
SPD478A
8.
Tighten pinion nut to the specified torque.
The threaded portion of drive pinion and pinion nut should be
free from oil or grease.
Tool number: KV38108300 (J44195)
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT FINAL DRIVE
R200A
Assembly (Cont’d)
PD-33
SPD664
9.
Turn drive pinion in both directions several revolutions, and
measure pinion bearing preload.
Tool number: ST3127S000 (J25765-A)
Pinion bearing preload:
1.1 - 1.4 N·m (11 - 14 kg-cm, 9.5 - 12.2 in-lb)
When pinion bearing preload is outside the specifications,
replace pinion bearing adjusting washer and spacer with a
different thickness.
SPD527
10. Select side bearing adjusting washer.
Refer to “SIDE BEARING PRELOAD”, PD-24.
11. Install differential case assembly with side bearing outer races
into final drive housing.
SPD558
12. Insert left and right side bearing adjusting washers in place
between side bearings and final drive housing.
SPD559
13. Drive in side bearing spacer with Tool.
Tool number: KV38100600 (J25267)
SPD526
14. Align mark on bearing cap with that on final drive housing and
install bearing cap on final drive housing.
FRONT FINAL DRIVE
R200A
Assembly (Cont’d)
PD-34
SPD560
15. Apply multi-purpose grease to cavity at sealing lips of oil seal.
Install side oil seal.
Tool number: KV38100200 (J26233)
SPD513
16. Measure ring gear to drive pinion backlash with a dial indica-
tor.
Ring gear-to-drive pinion backlash:
0.10 - 0.15 mm (0.0039 - 0.0059 in)
I
If backlash is too small, decrease thickness of right shim and
increase thickness of left shim by the same amount.
If backlash is too great, reverse the above procedure.
Never change the total amount of shims as it will change the
bearing preload.
SPD664
17. Check total preload with Tool.
When checking preload, turn drive pinion in both direc-
tions several times to set bearing rollers.
Tool number: ST3127S000 (J25765-A)
Total preload:
P
1
+ [0.3 - 1.5 N·m (3 - 15 kg-cm, 2.6 - 13.0 in-lb)]
P
1
: Drive pinion preload
SPD561
I
If preload is too great, remove the same amount of shim from
each side.
I
If preload is too small, add the same amount of shim to each
side.
Never add or remove a different number of shims for each side
as it will change ring gear to drive pinion backlash.
18. Recheck ring gear to drive pinion backlash because increase
or decrease in thickness of shims will cause change of ring
gear-to-pinion backlash.
SPD524
19. Check runout of ring gear with a dial indicator.
Runout limit:
0.05 mm (0.0020 in)
I
If backlash varies excessively in different places, the variance
may have resulted from foreign matter caught between the ring
gear and the differential case.
I
If the backlash varies greatly when the runout of the ring gear
is within a specified range, the hypoid gear set or differential
case should be replaced.
20. Check tooth contact. Refer to “TOOTH CONTACT”, PD-29.
21. Install rear cover and gasket.
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT FINAL DRIVE
R200A
Assembly (Cont’d)
PD-35
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