INFINITI QX4 2001 Factory Service Manual

SFA747B
FRONT WHEEL BEARINGNBAX00051. Check that wheel bearings operate smoothly.
2. Check axial end play.
Axial end play: 0 mm (0 in)
3. Adjust wheel bearing preload if there is any axial end play or
wheel bearing does not turn smoothly.
Preload AdjustmentNBAX0005S01Adjust wheel bearing preload after wheel bearing has been
replaced or front axle has been reassembled.
Adjust wheel bearing preload as follows:
1. Before adjustment, thoroughly clean all parts to prevent dirt
entry.
SFA891-A
2. Apply multi-purpose grease sparingly to the following parts:
IThreaded portion of spindle
IContact surface between wheel bearing lock washer (cham-
fered side) and outer wheel bearing
IGrease seal lip
IWheel hub (as shown at left)
SFA748B
3. Tighten wheel bearing lock nut with Tool.
: 78 - 98 N´m (8 - 10 kg-m, 58 - 72 ft-lb)
4. Turn wheel hub several times in both directions.
5. Loosen wheel bearing lock nut so that torque becomes 0 N´m
(0 kg-m, 0 ft-lb).
6. Retighten wheel bearing lock nut with Tool.
: 0.5 - 1.5 N´m (0.05 - 0.15 kg-m, 4.3 - 13.0 in-lb)
SFA747B
7. Turn wheel hub several times in both directions.
8. Retighten wheel bearing lock nut with Tool.
: 0.5 - 1.5 N´m (0.05 - 0.15 kg-m, 4.3 - 13.0 in-lb)
9. Measure wheel bearing axial end play.
Axial end play: 0 mm (0 in)
FRONT AXLE
On-vehicle Service (Cont'd)
AX-4

SMA580A
10. Measure starting force ªAº at wheel hub bolt.
SFA830
11. Install lock washer by tightening the lock nut within 15 to 30
degrees.
12. Turn wheel hub several times in both directions to seat wheel
bearing correctly.
13. Measure starting force ªBº at wheel hub bolt. Refer to proce-
dure 10.
14. Wheel bearing preload ªCº can be calculated as shown below.
C=BþA
Wheel bearing preload ªCº:
7.06 - 20.99 N (0.72 - 2.14 kg, 1.59 - 4.72 lb)
15. If wheel bearing preload ªCº is outside specifications, remove
lock washer. Tighten or loosen lock nut within±15 degrees
(Refer to step 11 above). Install lock washer, then repeat steps
12, 13 and 14.
16. Repeat above procedures until correct axial end play and
wheel bearing preload are obtained.
17. Install drive flange and wheel hub cap.
SFA901
DRIVE SHAFTNBAX0006ICheck boot and drive shaft for cracks, wear, damage and
grease leakage.
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FRONT AXLE
On-vehicle Service (Cont'd)
AX-5

Wheel Hub and Rotor Disc
COMPONENTSNBAX0007
SFA908B
SFA529A
REMOVALNBAX0008CAUTION:
Before removing the front axle assembly, disconnect the ABS
wheel sensor from the assembly. Then move it away from the
front axle assembly area. Failure to do so may result in dam-
age to the sensor wires and the sensor becoming inoperative.
1. Remove brake caliper assembly.
Brake hose need not be disconnected from brake caliper. In
this case, suspend caliper assembly with wire so as not to
stretch brake hose.
Be careful not to depress brake pedal, or piston will pop out.
Make sure brake hose is not twisted.
FRONT AXLE
Wheel Hub and Rotor Disc
AX-6

SFA802B
2. Remove hub cap with suitable tool.
SFA753B
3. Remove snap ring with suitable tool.
4. Remove drive flange.
SFA364BA
5. Remove lock washer.
SFA754B
6. Remove wheel bearing lock nut.
SFA832
7. Remove wheel hub and wheel bearing.
Be careful not to drop outer bearing.
INSTALLATIONNBAX00091. After installing wheel hub and wheel bearing, adjust wheel
bearing preload.
Refer to ªPreload Adjustmentº, ªFRONT WHEEL BEARINGº,
ªOn-vehicle Serviceº, AX-4.
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FRONT AXLE
Wheel Hub and Rotor Disc (Cont'd)
AX-7

SFA755B
2. Pack drive flange groove with grease, apply grease to O-ring
(two places) and mating surface of drive flange, and install
flange.
3. Install snap ring.
SFA759B
4. Install hub cap using a suitable tool.
Do not reuse hub cap. When installing, replace it with a new
one.
FA858
DISASSEMBLYNBAX0010IRemove grease seal and bearing outer races with suitable
brass bar.
INSPECTIONNBAX0011Thoroughly clean wheel bearings and wheel hub.
Wheel BearingNBAX0011S01IMake sure wheel bearing rolls freely and is free from noise,
crack, pitting and wear.
Wheel HubNBAX0011S02ICheck wheel hub for crack by using a magnetic exploration or
dyeing test.
SFA197-A
ASSEMBLYNBAX00121. Install bearing outer race with Tool until it seats in hub.
FRONT AXLE
Wheel Hub and Rotor Disc (Cont'd)
AX-8

SFA891-A
2. Pack multi-purpose grease into wheel hub.
SFA459B
3. Apply multi-purpose grease to each bearing cone.
4. Pack grease seal lip with multi-purpose grease, then install it
into wheel hub with suitable drift.
Knuckle Spindle
REMOVALNBAX00131. Remove drive shaft.
Refer to ªDrive Shaftº, AX-11.
SFA756B
2. Separate tie-rod end and lower ball joint from knuckle with
Tool.
Install stud nut conversely on stud bolt so as not to damage
stud bolt.
SFA758B
3. Separate knuckle from strut.
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FRONT AXLE
Wheel Hub and Rotor Disc (Cont'd)
AX-9

INSPECTIONNBAX0014Knuckle SpindleNBAX0014S01ICheck knuckle spindle for deformation, cracks and other dam-
age by using a magnetic exploration or dyeing test.
Needle BearingNBAX0014S02ICheck needle bearing for wear, scratches, pitting, flaking and
burn marks.
SFA962-A
INSTALLATIONNBAX00151. Install needle bearing into knuckle spindle.
Make sure that needle bearing is facing in proper direction.
Apply multi-purpose grease.
2. Install knuckle with wheel hub.
3. Install tie-rod end and lower ball joint.
SFA369BA
4. After installing knuckle spindle, adjust wheel bearing preload.
Refer to ªPreload Adjustmentº, ªFRONT WHEEL BEARINGº,
ªOn-vehicle Serviceº, AX-4.
5. After installing drive shaft, check drive shaft axial end play.
Do not reuse snap ring once it has been removed.
Refer to ªDrive Shaftº, AX-10.
Drive Shaft
COMPONENTSNBAX0016
SFA874-B
FRONT AXLE
Knuckle Spindle (Cont'd)
AX-10

SFA236
REMOVALNBAX00171. Remove hub cap and snap ring.
Refer to ªREMOVALº, ªWheel Hub and Rotor Discº, AX-6.
2. Remove bolts fixing drive shaft to final drive.
SFA760B
3. Remove transverse link fixing nut and bolts.
SFA761B
4. Separate drive shaft from knuckle by lightly tapping it with a
copper hammer.
Cover boots with shop towel so as not to damage them when
removing drive shaft.
SFA880
DISASSEMBLYNBAX0018Final Drive Side (TS82F)NBAX0018S011. Remove plug seal from slide joint housing by lightly tapping
around slide joint housing.
2. Remove boot bands.
SFA963
3. Move boot and slide joint housing toward wheel side, and put
matching marks.
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FRONT AXLE
Drive Shaft (Cont'd)
AX-11

SFA964
4. Remove snap ring.
SFA392
5. Detach spider assembly with press.
SFA799
6. Draw out boot.
Cover drive shaft serration with tape so as not to damage the
boot.
SFA455
Wheel Side (ZF100)NBAX0018S02CAUTION:
The joint on the wheel side cannot be disassembled.
IBefore separating joint assembly, put matching marks on drive
shaft and joint assembly.
ISeparate joint assembly with suitable tool.
Be careful not to damage threads on drive shaft.
IRemove boot bands.
INSPECTIONNBAX0019Thoroughly clean all parts in cleaning solvent, and dry with com-
pressed air. Check parts for evidence of deformation and other
damage.
Drive ShaftNBAX0019S01Replace drive shaft if it is twisted or cracked.
BootNBAX0019S02Check boot for fatigue, cracks, and wear. Replace boot with new
boot bands.
FRONT AXLE
Drive Shaft (Cont'd)
AX-12

Joint Assembly (Final drive side)NBAX0019S03IReplace any parts of double offset joint which show signs of
scorching, rust, wear or excessive play.
ICheck serration for deformation. Replace if necessary.
ICheck slide joint housing for any damage. Replace if neces-
sary.
Joint Assembly (Wheel side)NBAX0019S04Replace joint assembly if it is deformed or damaged.
ASSEMBLYNBAX0020IAfter drive shaft has been assembled, ensure that it
moves smoothly over its entire range without binding.
IUse NISSAN GENUINE GREASE or equivalent after every
overhaul.
SFA800
Final Drive Side (TS82F)NBAX0020S011. Install new small boot band, boot and side joint housing to
drive shaft.
Cover drive shaft serration with tape so as not to damage boot
during installation.
SFA397
2. Install spider assembly securely, ensuring marks are properly
aligned.
IPress-fit with spider assembly serration chamfer facing
shaft.
3. Install new snap ring.
SFA460BA
4. Pack with grease.
Specified amount of grease:
95 - 105 g (3.35 - 3.70 oz)
5. Make sure that boot is properly installed on the drive shaft
groove. Set boot so that it does not swell and deform when its
length is ªL
1º.
Length ªL
1º: 95 - 97 mm (3.74 - 3.82 in)
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FRONT AXLE
Drive Shaft (Cont'd)
AX-13