Infiniti QX4 (R50). Manual — part 512
SPD526
4.
Put matchmarks on one side of side bearing cap with paint or
punch to ensure that it is replaced in proper position during
reassembly.
Bearing caps are line-bored during manufacture and should
be put back in their original places.
PD343
5.
Remove side bearing caps.
SPD668
6.
Remove differential case assembly with a pry bar.
SPD527
Be careful to keep the side bearing outer races together with
their respective inner cones — do not mix them up.
CAUTION:
Side bearing spacer is placed on either the left or right
depending upon final drive gear ratio. It should be labeled so
that it may be replaced correctly.
SPD477A
7.
Loosen drive pinion nut.
Tool number: KV38108300 (J44195)
8.
Remove companion flange with puller.
FRONT FINAL DRIVE
R200A
Disassembly (Cont’d)
PD-20
SPD670
9.
Take out drive pinion together with rear bearing inner cone,
drive pinion bearing spacer and pinion bearing adjusting
washer.
10. Remove front oil seal and pinion front bearing inner cone.
PD349
11. Remove pinion bearing outer races with a brass drift.
SPD209
12. Remove pinion rear bearing inner cone and drive pinion height
adjusting washer.
Tool number: ST30031000 (J22912-01)
SPD207A
DIFFERENTIAL CASE
NBPD0018S03
1.
Remove side bearing inner cones.
To prevent damage to bearing, engage puller jaws in grooves.
Tool number:
A ST33051001 (J22888-20)
B ST33061000 (J8107-2)
SPD022
Be careful not to confuse the right and left hand parts.
Keep bearing and bearing race for each side together.
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT FINAL DRIVE
R200A
Disassembly (Cont’d)
PD-21
SPD024
2.
Loosen ring gear bolts in a criss-cross pattern.
3.
Tap ring gear off the differential case with a soft hammer.
Tap evenly all around to keep ring gear from binding.
SPD025
4.
Punch off pinion mate shaft lock pin from ring gear side.
SPD236A
DIFFERENTIAL SIDE SHAFT
NBPD0018S04
1.
Cut collar with cold chisel. Be careful not to damage differen-
tial side shaft.
SPD672
2.
Reinstall differential side shaft into extension tube and secure
with bolts. Remove rear axle bearing by drawing out differen-
tial side shaft from rear axle bearing with puller.
FRONT FINAL DRIVE
R200A
Disassembly (Cont’d)
PD-22
SPD647
SPD781
3.
Remove grease seal and oil seal.
Inspection
NBPD0019
RING GEAR AND DRIVE PINION
NBPD0019S01
Check gear teeth for scoring, cracking or chipping.
If any damaged part is evident, replace ring gear and drive pinion
as a set (hypoid gear set).
SPD097AA
DIFFERENTIAL CASE ASSEMBLY
NBPD0019S02
Check mating surfaces of differential case, side gears, pinion mate
gears, pinion mate shaft and thrust washers.
SPD715
BEARING
NBPD0019S03
1.
Thoroughly clean bearing.
2.
Check bearing for wear, scratches, pitting or flaking.
Check tapered roller bearing for smooth rotation. If damaged,
replace outer race and inner cone as a set.
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT FINAL DRIVE
R200A
Disassembly (Cont’d)
PD-23
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