wheel ISUZU TROOPER 1995 Manual Online

AUTOMATIC LOCKING FREE WHEEL HUB
(1) DOES NOT LOCK OR LOCKS ONLY ON ONE SIDE
NOTE:
Procedure for locking the locking hub.
1. Stop the vehicle.
2. Shift the transfer lever to 4H or 4L.
FRONT DRIVING AXLE 4C-3
3. Start driving the vehicle slowly and the hubs will lock automatically.
4. Once the hubs are locked, they will remain locked, even if the transfer lever is shifted from 4L or 4H
into 2H, as long as the vehicle travels in the same direction.
CHECKPOINT
CONDITION
Try locking procedure once Still will not lock.
more
(2) DOES NOT UNLOCK OR UNLOCKS ONLY ON ONE SIDE
NOTE:
Procedure for unlocking the locking hub.
1. Stop the vehicle.
2. Shift the transfer lever to 2H.
CORRECTION
Inspect the drive clutch assembly,
inner cam assembly, and housing,
and replace
if required.
3. Run the vehicle for three or four feet slowly in the reverse direction.
CHECKPOINT
CONDITION CORRECTION
Try unlocking procedure once Still will not unlock Drive the vehicle for five minutes and
more
(3) NOISES IN AUTOMATIC LOCKING HUB
NOTE:
then try the unlocking procedure
again.
If the locking hub does not
unlock, then inspect the drive clutch
assembly,
inner cam assembly, and
housing, and replace
if required.
Some noise during shifting from "LOCK" to "FREE" or vice versa is normal.
It
is not a sign of trouble.
POSSIBLE CAUSE CORRECTION
1. Hold out ring axial play excessive. 1. Correct the axial play or replace the drive clutch.
2. Hub operates on one side. 2. Replace the drive clutch.
3. Front axle or joint damaged or loose. 3. Replace or tighten.

4C-4 FRONT DRIVING AXLE
ON-VEHICLE SERVICE
PINION SHAFT OIL SEAL REPLACEMENT
1
Removal steps 1. Flange nut
2. Flange 3. Oil seal 4. Outer bearing
5. Collapsible spacer
Installation steps To install, follow the removal steps in reverse
Fig. 4C-1
1••1 REMOVAL
• Raise the vehicle and support it at the frame.
The
hoist must remain under the front axle
housing.
• Drain the front axle oil (Fig. 4C-2).
~wIll ~I · I ~----fl______~~-' Filler (./ Q i,
//plug ~ I ) . ---
-\\I 11/~/~
~ <:1 0
0
0
Fig. 4C-2
•
Remove the front propeller shaft. Refer to
Section 4A "PROPELLER SHAFT"
NOTE:
For vehicle with automatic locking hub, the front
wheel hub may lock while performing propeller
shaft removal. In such a case, free the front
wheels from hoist or jack and turn the front
wheel manually to unlock the front wheel hub.
1. Flange nut (Fig. 4C-3)
• Using special tool, remove the flange nut.
1®.1 Pinion flange holder: J-37221
Fig.
4C-3
•

2. Flange
3. Oil seal
4. Outer bearing
f'Qil • Using special tool, remove the outer bearing
~ (Fig. 4C-3a).
Remover: J-39602
FRONT DRIVING AXLE 4C-5
Fig. 4C-4
2. Flange
1. Flange nut
• Refer to "DIFFERENTIAL ASSEMBLY" for
flange
nut reassembly in this section.
NOTE:
Fig. 4C-3a • Discard the used nut and install a new one.
5. Collapsible spacer
1L:~'I INSPECTION AND REPAIR
Make necessary correction or parts replacement if
wear, damage, corrosion or any other abnormal
condition are found through inspection.
Check the
following parts.
• Seal surface of the pinion.
• Cage bore for burns.
1••1 INSTALLATION
5. Collapsible spacer
• Discard the used collapsible spacer and install
a new one.
4. Outer bearing
NOTE:
• Do not drive in, but just temporarily set in the
outer bearing by hand, which should be
indirectly pressed in
finally by tightening the
flange nut.
3. Oil seal (Fig. 4C-4)
f'Qil • Use oil seal installer to install a new oil seal that
~ has been soaked in axle lubricant.
Installer: J-24250
FRONT DRIVE SHAFT JOINTS
REPLACEMENT
• Refer to "FRONT DRIVE AXLE ASSEMBLY" and
"FRONT HUB AND DISC" in this section.
~ FRONT HUB BEARING PRELOAD CHECK
• Check the hub bearing preload at the wheel pin
(Fig. 4C-5).
New bearing and
New oil seal
Reused bearing and
New
oil seal
Fig.
4C-5
N (lb)
19.6-24.5 (4.4-5.5)
11.8-17.7 (2.6-4.0)

l•!•l DISASSEMBLY
•
•
•
Jack up the vehicle and support it using jack
stands.
Remove the
tire and wheel.
Remove the drain bolt to drain differential oil.
NOTE:
•
During the work, be sure that the diff case is
supported by the jack (Fig. 4C-7).
Fig.
4C-7
• Remov: the brake caliper fixing bolt and hang
the caliper. Refer to Section 5A2 "DISC
BRAKES".
•
Remove the antilock brake system speed
sensor.
(If equipped with antilock brake
system) Refer
to Section 5A4 "4-WHEEL ANTI­
LOCK
BRAKE SYSTEM (ABS)".
1. Hub assembly (Disc, back plate and knuckle)
• Remove the locking hub. Refer to this Section
"FRONT HUB AND DISC".
•
Disconnect the knuckle and the suspension
arm. Refer
to Section 3C "FRONT SUSPEN­
SION".
2. Steering link and arm assembly
• Refer to Section 3B3 "STEERING LINKAGE".
3. Suspension crossmember
4. Propeller shaft
• Refer to Section 4A "PROPELLER SHAFT".
5. Mounting bolt and nut (Fig. 4C-8)
FRONT DRIVING AXLE 4C-7
Fig. 4C-8
6. Washer and spacer
7. Bolt (Fig. 4C-9)
• Remove the mounting bracket fixing bolt.
Fig. 4C-9
8. Front axle case assembly and front drive shaft
assembly (LH side) (Fig. 4C-10)
• Lower the vehicle and disconnect the RH front
drive shaft assembly, and then remove the
front axle case assembly and front drive shaft
assembly (LH).
Fig. 4C-10

.
fi•28 FRONT DRIVINGk "
;: ~ ·~-¢,,
FRONT HUB AND D1SC (4WD Model with Automatic Locking Hub)
Disassembly steps 1. Bolt
2. Hub cap 3. Housing
4. Snap ring and shim
5. Drive clutch assembly 6. Inner cam assembly
7. Lock washer and lock screw 8. Hub nut
9. Hub and disc assembly 10. ABS sensor ring
11. Outer bearing outer race 12. Oil seal
13. Inner bearing outer race 14. Bolt
15. Wheel pin
Fig. 4C-72
10
9
Reassembly steps 15. Wheel pin 14. Bolt 13. Inner bearing outer race 11. Outer bearing outer race
12. Oil seal 10. ABS sensor ring 9. Hub and disc assembly 8. Hub nut 7. Lock washer and lock screw
6. Inner cam assembly 5. Drive clutch assembly 4. Snap ring and shim 3. Housing
2. Hub cap 1. Bolt
'
.f,
c. ' . .,;
)
t
~::
•

1•! .. 1 DISASSEMBLY
•
Shift the transfer lever to the "2H" position and
move the vehicle forward and rearward about
one meter.
• Remove the 14mm hex bolts.
• Before disassembly, jack up the front of vehicle
and
support frame with jack stands.
• Remove the disc brake caliper assembly and
hang
it on the frame with wires. Refer to Section
5A2
"DISC BRAKES".
1. Bolt (Fig. 4C-73)
Fig. 4C-73
2. Hub cap
3. Housing
4. Snap ring and shim
5. Drive clutch assembly
6. Inner cam assembly
7. Lock washer and lock screw
8. Hub nut (Fig. 4C-74)
1®.1 Wrench: J-36827
Fig. 4C-74
Front hub nut wrench (J-36827)
FRONT DRIVING AXLE 4C-29
9. Hub and disc assembly
10. ABS
sensor ring (if so equipped)
11.
Outer bearing outer race
12.
Oil seal
13. Inner bearing outer race
1) Remove the outer bearing from the hub with
fingers. The inner bearing will remain in the
hub and may be removed after prying out the
inner bearing lip seal assembly (Fig. 4C-75).
2) Remove the outer race by driving out the
race from the hub with a brass drift inserted
behind
the race in the notches in the hubs.
Inner bearing
outer race
Fig. 4C-75
14.
Bolt (Fig. 4C-76)
• If necessary, replace the wheel pin in the
following manner.
1) Apply a scribe mark to disc to hub.
2) Clamp the hub and disc assembly in a vise,
using protective pads. Remove
the 6 disc­
to-hub retaining bolts.
Scribe mark
Fig. 4C-76

4C -30 FRONT DRIVING AXLE
15. Wheel pin (Fig. 4C-77)
• Place
hub on a suitable work surface and
remove the
wheel studs, as required, using a
hammer.
Fig. 4C-77
I L•IINSPECTION AND REPAIR
Make necessary correction or parts replacement if
wear, damage, corrosion or any other abnormal
condition are found through inspection.
Check
the following parts.
• Hub
• Hub bearing oil seal
• Knuckle spindle
•
Disc
• Caliper
•
Automatic locking hubs
• ABS sensor ring
For inspection and servicing
of disc caliper and
related parts, refer to Section 5A2 "DISC BRAKES".
rfil Inside diameter of housing measurement (Fig.
~ 4C-78)
mm(in)
Standard Limit
65.04 (2.561)
65.24 (2.568)
Inspect flange surface A and 8 for excessive wear.
A ---....
1 I
'-/ I
i/ 8mm (Measuring point) I I
~.
e
Fig. 4C-78
rfil Drive clutch section
~ measurement (Fig. 4C-79)
Standard
8.2 (0.323)
L
Fig. 4C-79 dimensions
ulu
mm(in)
Limit
7.8
(0.307)
1@ 1 Hold ring sliding resistance check (Fig. 4C-80)
Check the sliding resistance along opening
direction as shown in the figure.
N (lb)
Sliding Resistance 16.7-34.3 (3.8-7.7)
......
Fig. 4C-80

r.r.il Holdout ring axial play of the drive clutch
1..!!:.1 assembly (Fig. 4C-81 ).
mm (in)
Standard Limit
----~----------------0.3 (0.012) or less 0.4 (0.016)
Fig. 4C-81
r.r.il Outside diameter of the drive clutch assembly
1..!!:.1 (D) measurement (Fig. 4C-82)
Standard
64.75 (2.55)
Fig. 4C-82
l•! .. l REASSEMBLY
15. Wheel pin (Fig. 4C-83)
mm (in)
Limit
64.55 (2.54)
1) Place the hub on a wood workbench or a block
of wood approx. 6" by 6" to protect the wheel
stud ends and threads.
2) Insert a wheel stud using a hammer.
Be sure the wheel stud is started squarely and
seats completely.
FRONT DRIVING AXLE 4C-31
...____[)
Fig. 4C-83
14.
Bolt (Fig. 4C-84)
0 • A.lign scribe marks and attach the hub to the
1!!:!1 diSC.
Tighten the bolts to the specified torque.
~~~ Torque N·m (lb·ft) I 103 (76)
Scribe mark
Fig. 4C-84
13.
Inner bearing outer race (Fig. 4C-85)
1'?.:\1 • Install the outer race; inner bearing by driving it
l..::5::il into the hub.
Installer: J-36829
Grip:
J-8092
Fig. 4C-85

4C-32 FRONT DRIVING AXLE
11. Outer bearing and outer race (Fig. 4C-86)
li5\l • Install the outer race; outer bearing by driving it
L::!iil into the hub.
Installer: J-36828
Grip: J-8092
Fig. 4C-86
12. Oil seal (Fig. 4C-87)
r::::l • Place the inner bearing onto the outer race in
D the hub and install a new oil seal and retaining
~. ring.
Apply Besco L-2 or equivalent to the lip portion.
Installer: J-36830
Grip: J-8092
Fig. 4C-87
10. ABS sensor ring (if so equipped)
~~~ Torque N·m (lb·ft) [ 18 (13)
9. Hub and disc assembly (Fig. 4C-88)
r::::l 1) Put grease in the hub.
D 2) Place Besco L-2 or equivalent to the outer and
inner bearing.
g (oz)
Hub 35 (1.23)
Outer bearing 10 (0.35)
Inner bearing 15 (0.53)
Outer bearing Inner
bearing
Fig. 4C-88
8. Hub nut (Fig. 4C-89)
r=1 • Install the nut with the chamfered edge of
~ inside diameter outward.
1®..1 Wrench: J-36827
Front hub nut wrench (J-36827)
Fig. 4C-89
IEEI Preload adjustment (Fig. 4C-90)
Tighten the hub nut to 29.4 N·m (21.7 lb·ft), then
loosen the
nut fully.
Tighten the hub nut to reach the bearing preload
given below, using a spring scale on the wheel
pin.
Bearing
Preload
New bearing and
New oil seal
Used bearing and
New
oil seal
19.6-24.5
(4.4-5.5)
11.8-17.7
(2.6-4.0)
N (lb)
If the measured bearing preload is outside the
specifications, adjust
it by loosening or tightening
the bearing nut.
•

4C-40 FR _ __;,.=... • ONT DRIVING -=~~~~~A~X~L~E __ __
FREE WHEELING HUB ------------------N·m (lb·ft)
Fig. 4C-108