Infiniti QX4 (R50). Manual — part 96
Components
NBAX0028
SRA756A
Removal
NBAX0029
CAUTION:
I
Before removing the rear axle, disconnect the ABS wheel
sensor from the assembly. Then move it away from the
axle. Failure to do so may result in damage to the sensor
wires and the sensor becoming inoperative.
I
Wheel bearing does not require maintenance.
I
If growling noise is emitted from wheel bearing during
operation, replace wheel bearing assembly.
I
If the wheel bearing assembly is removed, it must be renewed.
The old assembly must not be re-used.
SAX002
1.
Disconnect parking brake cable and brake tube.
2.
Remove nuts securing wheel bearing cage with baffle plate.
SRA758A
3.
Draw out axle shaft with Tool.
When drawing out axle shaft, be careful not to damage oil seal.
GI
MA
EM
LC
EC
FE
AT
TF
PD
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REAR AXLE
Components
AX-19
SRA759A
4.
Remove oil seal with a screwdriver.
Do not reuse oil seal once it is removed.
Always install new one.
5.
Remove ABS sensor rotor.
SRA104
6.
Unbend lock washer with a screwdriver.
Do not reuse lock washer once removed. Always install new
one.
SRA728
7.
Remove bearing lock nut with Tool.
SRA729-B
8.
Remove wheel bearing together with bearing cage and baffle
plate from axle shaft.
SRA106
9.
Remove grease seal with a screwdriver.
10. Remove wheel bearing assembly with a brass drift.
REAR AXLE
Removal (Cont’d)
AX-20
Inspection
NBAX0030
AXLE SHAFT
NBAX0030S01
Check axle shaft for straightness, cracks, damage, wear and dis-
tortion. Replace if necessary.
BEARING CAGE
NBAX0030S02
Check bearing cage for deformation and cracks. Replace if neces-
sary.
REAR AXLE HOUSING
NBAX0030S03
Check rear axle housing for yield, deformation and cracks. Replace
if necessary.
SRA288A
Installation
NBAX0031
1.
Press new wheel bearing until it bottoms end face of bearing
cage.
Maximum load P:
39 kN (4 ton, 4.4 US ton, 3.9 Imp ton)
Always press outer race of wheel bearing during installation.
SRA289A
2.
Press new grease seal until it bottoms end face of bearing
cage.
After installing new grease seal, coat sealing lip with multi-
purpose grease.
SRA761A
3.
Press axle shaft into inner race of wheel bearing.
Maximum load P:
47.1 kN (4.8 ton, 5.3 US ton, 4.72 Imp ton)
Be careful not to damage and deform grease seal.
SRA762A
4.
Install plain washer and a new wheel bearing lock washer.
5.
Tighten wheel bearing lock nut to specified torque.
: 245 - 314 N·m (25 - 32 kg-m, 181 - 231 ft-lb)
Fit wheel bearing lock washer lip in wheel bearing lock nut
groove correctly by tightening lock nut. Be sure to bend it up.
GI
MA
EM
LC
EC
FE
AT
TF
PD
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REAR AXLE
Inspection
AX-21
SRA763A
6.
Check wheel bearing preload.
a.
Turn bearing cage (with respect to axle shaft) two or three
times. It must turn smoothly.
b.
Attach spring gauge to bearing cage bolt (as shown at left) and
pull it at a speed of 10 rpm to measure preload.
Spring gauge indication:
6.9 - 48.1 N (0.7 - 4.9 kg, 1.5 - 10.8 lb)
SRA292A
7.
Install new oil seal to rear axle housing using a suitable tool.
After installing new oil seal, coat sealing lip with multi-pur-
pose grease.
SRA012
8.
Press ABS sensor rotor onto axle shaft until it contacts wheel
bearing lock nut.
9.
Position axle shafts in rear axle housing with Tool as a guide.
Be careful not to damage oil seal.
SRA755A
10. Check axial end play.
a.
Check that wheel bearings operate smoothly.
b.
Check axial end play.
Axial end play:
0 mm (0 in)
Service Data and Specifications (SDS)
WHEEL BEARING (REAR)
NBAX0032
Wheel bearing axial end play
0 mm (0 in)
Wheel bearing lock nut tightening torque
245 - 314 N·m (25 - 32 kg-m, 181 - 231 ft-lb)
Wheel bearing preload measured at bearing cage bolt
6.9 - 48.1 N (0.7 - 4.9 kg, 1.5 - 10.8 lb)
REAR AXLE
Installation (Cont’d)
AX-22
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