2002 NISSAN TERRANO Service Repair Manual

Trouble-shooting
Noise occurring in the auto hub under any of the conditions
described is not indicative of a problem. Noise can be eliminated
by properly operating the transfer lever of the vehicle.
Noise
Was the transfer lever shifted from
the ª2Hº to the ª4Hº position while
the vehicle was operated at a
speed greater than 40 km/h (25
MPH)?
No
EYe s
Shifting the transfer lever from the
ª2Hº to the ª4Hº position in high-
speed operation (Fig.
,Fig.
), is sometimes difficult. At this
point, a clattering occurs in the
auto hub. If shifting is stopped
halfway, the drive shaft no longer
rotates and the cam is held in the
ªLOCKº position (Fig.
). In this
case, the noise will continue until
the vehicle is stopped. When this
occurs, decrease vehicle speed to
less than 40 km/h (25 MPH),
return the transfer lever to the
ª2Hº position once and then
reshift to the ª4Hº position.
Gears will then be engaged and
the noise will cease (Fig.
).
Was the transfer lever shifted from
the ª2Hº to the ª4Hº position while
the vehicle was operated at a
speed less than 40 km/h (25
MPH)?
No
EYe s
When noise occurs in the auto
hub while shifting from the ª2Hº to
the ª4Hº position (Fig.
,Fig.
), do not stop shifting halfway.
When shifted to the ª4Hº position,
the ª4WDº pilot lamp will come on
to indicate that the gears are
engaged properly and that the
vehicle is set in the 4WD mode.
Noise will then cease (Fig.
). If
shifting is stopped halfway, noise
will continue.
In such a case, return the transfer
lever to the ª2Hº position once
and re-shift it to the ª4Hº position.
Gears will then be engaged and
the noise will cease (Fig.
). (If
the lever is left in the ª2Hº
position, the noise will continue
until the vehicle is stopped.)
qA
SFA516A
SFA517A
SFA518A
H
H
H
FRONT AXLE Ð Auto-lock Free-running Hub
FA-15

qA
Was the vehicle started after the
transfer lever was shifted from the
ª2Hº to the ª4Hº or ª4Lº position?
No
EYe s
A clicking noise can sometimes
occur in the auto hub when the
gears are engaged. This is not a
problem.
Noise can be encountered during
rapid acceleration while rear
wheels are slipping on snowy
roads, muddy roads, slopes, etc.
(Fig.
,Fig.).
In such a case, release the accel-
erator pedal to reduce engine
speed. Gears will then be
engaged and the noise will cease
(Fig.
).
Was the vehicle backed up when
the transfer lever was in the ª4Hº
or the ª4Lº position, or was the
vehicle backed up while on a
downgrade when the transfer
lever was in the ª4Hº or the ª4Lº
position?
No
EYe s
When backing up the vehicle with
the transfer in the ª4Hº or the ª4Lº
position, auto-hub gears some-
times disengage but soon reen-
gage (Fig.
,Fig.,Fig.
) with a clicking noise. This is
not a problem. Noise will also
occur if the vehicle is accelerated
rapidly while the gears are disen-
gaged. In such a case, release the
accelerator pedal once to
decrease engine speed. Gears will
then be engaged and the noise
will cease (Fig.
).
Was the vehicle turned on a dry
pavement, when the transfer lever
was in the ª4Hº or the ª4Lº posi-
tion?
No
EYe s
Under these conditions, noise
occurs in tires (creaking) or in the
power train (rattling) Ð not in the
auto hub.
Avoid driving in the conditions
described above as it may lead to
tire wear.
qB
SFA519A
SFA520A
SFA521A
SFA522A
SFA523A
H
H
H
H
FRONT AXLE Ð Auto-lock Free-running Hub
Trouble-shooting (Cont'd)
FA-16

qB
Was the vehicle moved in one
direction after the vehicle was
driven in another direction when
the transfer lever was in the ª4Hº
or the ª4Lº position and then
returned to the ª2Hº position?
No
EYe s
Auto-hub gears will disengage
with a resultant noise (clicking). If
the distance the vehicle is moved
in the opposite direction is short
[less than1m(3ft)] or if the rota-
tion angle of the left and right
wheels is not the same (as in
rounding a corner), gears on one
side will disengage (Fig.
).
Under this condition, a noise
(crushing, etc.) might occur while
driving in the ª2Hº position. If only
gears on one side are unlocked,
the locked drive shaft rotates at
the same speed as wheels;
however, the unlocked drive shaft
is made to rotate in the reverse
direction by the differential. This
forces by auto hub's slide gear to
lock in the reverse direction. As a
result, noise occurs.
If this happens, slowly move the
vehicle straight back approxi-
mately 2 to3m(7to10ft)with
the transfer lever in the ª2Hº posi-
tion to disengage the gears on the
other side.
Was the vehicle driven with the
transfer lever in the ª2Hº position
in extremely cold weather?
No
EYe s
In extremely cold weather (areas),
the viscosity of differential oil is
greater than in moderate weather.
When the auto hubs are unlocked
with the transfer lever set to the
ª2Hº position, one auto hub can
sometimes remain locked.
This causes noise during opera-
tion. Noise can also occur in the
auto hub when the front propeller
shaft is rotated due to the viscos-
ity resistance of the transfer fluid
(Fig.
).
In such a case, drive in the ª4Hº
position for approximately 10 min-
utes until the vehicle warms up,
and return the transfer lever to the
ª2Hº position to eliminate the
noise.
Disassemble and check the auto
hub.
(Refer to ªRemoval and
Installationº, FA-18.)
NFA005
SFA525A
H
H
H
FRONT AXLE Ð Auto-lock Free-running Hub
Trouble-shooting (Cont'd)
FA-17

Removal and Installation
IRemove free-running hub assembly.
Refer to ªFRONT AXLE Ð Auto-Lock Free-running Hubº,
FA-14.
IRemove brake caliper assembly.
Brake hose does not need to be disconnected from brake
caliper.
Be careful not to depress brake pedal, or piston will pop out.
Make sure brake hose is not twisted.
IRemove lock washer.
IRemove wheel bearing lock nut with Tool.
Tool: KV40105400
IRemove wheel hub and wheel bearing.
Be careful not to drop outer bearing.
IAfter installing wheel hub and wheel bearing, adjust wheel
bearing preload.
Refer to ªPRELOAD ADJUSTMENTº, ªFront Wheel Bearingº,
FA-6.
Disassembly
IDrive bearing outer races with suitable brass bar.
SFA926
NFA006
NFA007
SFA832
FA858
FRONT AXLE Ð Wheel Hub and Rotor Disc
FA-18

Inspection
Thoroughly clean wheel bearing and wheel hub.
WHEEL BEARING
IMake sure wheel bearing rolls freely and is free from noise,
crack, pitting or wear.
WHEEL HUB
ICheck wheel hub for cracks by using a magnetic exploration or
dyeing test.
Assembly
IInstall bearing outer race with Tool until it seats in hub.
IPack multi-purpose grease to hub and hub cap.
IApply multi-purpose grease to each bearing cone.
IPack grease seal lip with multi-purpose grease, then install it
into wheel hub with suitable drift.
YFA010
EFA008
FA781
SFA747
FRONT AXLE Ð Wheel Hub and Rotor Disc
FA-19

Removal
IRemove free-running hub assembly.
Refer to ªFRONT AXLE Ð Auto-lock Free-running Hubº, FA-14.
ISeparate drive shaft from knuckle spindle by slightly tapping
drive shaft end.
ISeparate tie-rod from knuckle spindle with Tool.
Install stud nut conversely on stud bolt so as not to damage
stud bolt.
ISeparate knuckle spindle from ball joints.
(1) Loosen (not remove) upper and lower ball joint tightening nuts.
(2) Separate upper and lower ball joints to knuckle spindle with
Tool.
During above operation, never remove ball joint nuts which
are loosened in step (1) above.
Tool: HT72520000
NFA008
NFA009
NFA010
SFA927
SFA079
FRONT AXLE Ð Knuckle Spindle
FA-20

(3) Remove ball joint tightening nuts.
Support lower link with jack.
(4) Separate knuckle spindle from upper and lower links.
Inspection
KNUCKLE SPINDLE
ICheck knuckle spindle for deformation, cracks or other damage
by using a magnetic exploration or dyeing test.
NEEDLE BEARING
ICheck needle bearing for wear, scratches, pitting, flaking and
burn marks.
Installation
IInstall needle bearing into knuckle spindle.
Make sure that needle bearing is facing in proper direction.
Apply multi-purpose grease.
IInstall knuckle spindle to upper and lower ball joints with lower
link jacked up.
CAUTION:
Make sure that oil or grease does not come into contact with
tapered areas of ball joint and knuckle spindle and threads of
ball joint.
IAfter installing knuckle spindle, adjust wheel bearing preload.
Refer to ªPRELOAD ADJUSTMENTº, ªFront Wheel Bearingº,
FA-6.
IAfter installing drive shaft, check drive shaft axial end play.
Do not reuse snap ring once it has been removed.
Temporarily install snap ring at same thickness as it was
installed before removal.
Refer to ªFRONT AXLE Ð Drive Shaftº, FA-22.
NFA011
NFA012
SFA929
NFA013
FRONT AXLE Ð Knuckle Spindle
Removal (Cont'd)
FA-21

Removal and Installation
Removal
1. Remove bolts fixing drive shaft to final drive.
2. Remove free-running hub assembly with brake pedal
depressed. Refer to ªFRONT AXLE Ð Auto-lock Free-running
Hubº, FA-14.
IRemove brake caliper assembly without disconnecting brake
hydraulic line.
Make sure that brake hose is not twisted.
IRemove tie-rod ball joint. Refer to ªFRONT AXLE Ð Knuckle
Spindleº, FA-20.
SFA874
SFA236
FRONT AXLE Ð Drive Shaft
FA-22