Nissan Terrano r20e. Manual — part 319
q
B
Was the vehicle moved in one
direction after the vehicle was
driven in another direction when
the transfer lever was in the “4H”
or the “4L” position and then
returned to the “2H” position?
No
E
Yes
Auto-hub gears will disengage
with a resultant noise (clicking). If
the distance the vehicle is moved
in the opposite direction is short
[less than 1 m (3 ft)] 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 “2H” 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 to 3 m (7 to 10 ft) with
the transfer lever in the “2H” posi-
tion to disengage the gears on the
other side.
Was the vehicle driven with the
transfer lever in the “2H” position
in extremely cold weather?
No
E
Yes
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
“2H” 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 “4H”
position for approximately 10 min-
utes until the vehicle warms up,
and return the transfer lever to the
“2H” position to eliminate the
noise.
Disassemble and check the auto
hub.
(Refer to “Removal and
Installation”, FA-18.)
NFA005
SFA525A
H
H
H
FRONT AXLE — Auto-lock Free-running Hub
Trouble-shooting (Cont’d)
FA-17
Removal and Installation
I
Remove free-running hub assembly.
Refer to “FRONT AXLE — Auto-Lock Free-running Hub”,
FA-14.
I
Remove 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.
I
Remove lock washer.
I
Remove wheel bearing lock nut with Tool.
Tool: KV40105400
I
Remove wheel hub and wheel bearing.
Be careful not to drop outer bearing.
I
After installing wheel hub and wheel bearing, adjust wheel
bearing preload.
Refer to “PRELOAD ADJUSTMENT”, “Front Wheel Bearing”,
FA-6.
Disassembly
I
Drive bearing outer races with suitable brass bar.
SFA926
NFA006
NFA007
SFA832
FA858
FRONT AXLE — Wheel Hub and Rotor Disc
FA-18
Inspection
Thoroughly clean wheel bearing and wheel hub.
WHEEL BEARING
I
Make sure wheel bearing rolls freely and is free from noise,
crack, pitting or wear.
WHEEL HUB
I
Check wheel hub for cracks by using a magnetic exploration or
dyeing test.
Assembly
I
Install bearing outer race with Tool until it seats in hub.
I
Pack multi-purpose grease to hub and hub cap.
I
Apply multi-purpose grease to each bearing cone.
I
Pack grease seal lip with multi-purpose grease, then install it
into wheel hub with suitable drift.
YFA010
EFA008
FA781
SFA747
FRONT AXLE — Wheel Hub and Rotor Disc
FA-19
Removal
I
Remove free-running hub assembly.
Refer to “FRONT AXLE — Auto-lock Free-running Hub”, FA-14.
I
Separate drive shaft from knuckle spindle by slightly tapping
drive shaft end.
I
Separate tie-rod from knuckle spindle with Tool.
Install stud nut conversely on stud bolt so as not to damage
stud bolt.
I
Separate 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 — Knuckle Spindle
FA-20
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