wheel ISUZU TFS SERIES 1997 Repair Manual

FRONT WHEEL DRIVE 4C1-53
Preload Adjustment
Tighten the hub nut at 29.4 Nm (3 kgfm / 21.716 lb.ft), then
loosen the nut to the full.
Tighten the hub nut at the value given below, using a spring
scale on the wheel pin.
Bearing Preload kg(lb)
New bearing and New oil seal 2 -2.5 (4.4 - 5.5)
Used bearing and New oil seal 1.2 - 1.8 (2.68 - 4.0)
If the measured bearing preload is outside the specifications,
adjust it by loosening or tightening the bearing nut.
6. Lock Washer
Turn the side with larger diameter of the tapered bore to the
vehicle outer side, and attach the washer.
If the bolt holes in the lock plate are not aligned with the
corresponding holes in the nut, reverse the lock plate.
If the bolt holes are still out of alignment, turn in the nut just
enough to obtain alignment,. Screw is to be fastened tightly so
its head may come lower than the surface of the washer.
8. Snap ring, shims
Adjust the clearance between the collar and the snap ring.
Clearance mm(in)
0 - 0.3 (0 - 0.01)
Adjust shims available
mm(in)
0.2, 0.3, 0.5, 1.0
(0.008, 0.011, 0.020, 0.039)
10.bolt
Torque N
m (kgfm/lbft)
10 - 14 (1.0 - 1.4 / 7 - 10)

4C1-54 FRONT WHEEL DRIVE
FRONT HUB AND DISC (Automatic Locking Hub)
DISASSEMBLY
Disassembly Steps
1. Bolt
2. Hub cap
3. Housing assembly
4. Snap ring and shim
5. Drive clutch assembly
6. Inner cam
7. Lock washer8. Hub nut
9. Hub and disc assembly
10. Outer bearing and outer race
11. Oil seal
12. Inner bearing and outer race
13. Bolt
14. Wheel pin

FRONT WHEEL DRIVE 4C1-55
Important Operations
1. Bolt
Shift the transfer lever to the “2H” position and move the
vehicle forward and rearward about one meter.
Remove the 14 mm hex bolts.
8. Hub Nut
Wrench : 5-8840-2117-0
(J-36827)
Refer to Section 5 “Brake” for disc brake
caliper removal procedure9. Hub and Disc Assembly
Before disassembly, remove the disc brake caliper assembly
and hang it on the frame with wires.
10.Outer Bearing and Outer Race
12.Inner Bearing and 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.
(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.
If necessary, replace the wheel pin in the following manner.
13.Bolt
(1) Apply a scribe mark to disc to hub.
(2) Clamp the hub and disc assembly in a vise using protective
pads and remove the 6 disc to hub retaining bolts.

4C1-56 FRONT WHEEL DRIVE
14.Wheel Pin
Place pins hub on a suitable work surface and remove the
wheel studs, as required, using a hammer.

FRONT WHEEL DRIVE 4C1-57
INSPECTION AND REPAIR
Make necessary correction or parts replacement if wear, damage or any other abnormal conditions are found
through inspection.
For inspection and servicing of disc caliper, and relative parts, refer to Section 5 “Service Brakes”.
Hub
Hub bearing, oil seal
Knuckle spindle
Disc
Caliper
Automatic locking hubs
Visual Check
Check the following parts for wear, damage or other abnormal
conditions.
Inside Diameter of Housing
mm(in)
Standard Limit
65.04 (2.61) 65.24 (2.568)
Inspect flange surface A and B for excessive wear.
Drive Clutch Section Dimensions “L”
mm(in)
Standard Limit
8.2 (0.323) 7.8 (0.37)
Holdout Ring Axial Play of the Drive
Clutch Assembly
mm(in)
Standard Limit
0.3 (0.012) or less 0.4 (0.016)

4C1-58 FRONT WHEEL DRIVE
Outside Diameter of the Drive Clutch
Assembly
mm(in)
Standard Limit
64.75 (2.55) 64.55 (2.54)

FRONT WHEEL DRIVE 4C1-59
REASSEMBLY
Reassembly Steps
1. Wheel pin
2. Bolt
3. Inner bearing and outer race
4. Outer bearing and outer race
5. Oil seal
6. Hub and disc assembly
7. Hub nut
8. Lock washer
9. Inner cam
10. Drive clutch assembly
11. Snap ring and shim
12. Housing assembly
13. Hub cap
14. Washer and bolt

4C1-60 FRONT WHEEL DRIVE
Important Operations
1. Wheel Pin
(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.
2. Bolt
Align scribe marks and attach the hub to the disc.
Torque N
m (kgfm/lbft)
103
5 (10.5 1/75.9 7.2)
3. Inner Bearing and Outer Race
Outer race ; inner bearing
Install the outer race by driving it into the hub.
Installer : 5-880-2119-0
(J-36829)
Grip : 5-8840-0007-0
(J-8092)
4. Outer Bearing and Outer Race
Outer race ; outer bearing
Install the outer race by driving it into the hub.
Installer : 5-8840-0054-0
(J-29015)
Grip : 5-8840-0007-0
(J-8092)
5. Oil Seal
Place the inner bearing onto the outer race in the hub and
install a new oil seal and retaining ring.
Apply Besco L-2 or equivalent to the lip portion.
Installer : 5-8840-2120-0
(J-36830)
Grip : 5-8840-0007-0
(J-8092)

FRONT WHEEL DRIVE 4C1-61
6. Hub and Disc Assembly
(1) Apply grease in the hub.
(2) Apply 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)
7. Hub Nut
Turn the place where there is a chamfer in the tapped hole to
the outer side, and attach the nut.
Wrench : 5-8840-2117-0
(J-36827)
Preload Adjustment
Tighten the hub nut at 29.4 N
m (3 kgfm / 21.716 lbft), then
loosen the nut to the full.
Tighten the hub nut at the value given below, using a spring
scale on the wheel pin.
Bearing Preload kg(lb)
New bearing and New oil seal 2 -2.5 (4.4 - 5.5)
Used bearing and New oil seal 1.2 - 1.8 (2.6 - 4.0)
If the measured bearing preload is outside the specifications,
adjust it by loosening or tightening the bearing nut.
8. Lock Washer
Turn the side with larger diameter of the tapered bore to the
vehicle outer side, and attach the washer.
If the bolt holes in the lock plate are not aligned with the
corresponding holes in the nut, reverse the lock plate.
If the bolt holes are still out of alignment, turn in the nut just
enough to obtain alignment,. Screw is to be fastened tightly so
its head may come lower than the surface of the washer.

4C1-62 FRONT WHEEL DRIVE
9. Inner Cam
(1) Before installation, shift the transfer lever to “2H” position.
(2) Clean the flange surface of the hub, the thread holes, the
surface of the lock washer and the spline portion of the axle
shaft.
(3) Install the inner cam by aligning the key way of the inner
cam with the groove of the knuckle.
Hit the inner cam lightly with plastic hammer or equivalent
and make sure the inner cam is in contact with the lock
washer.
If it is difficult to install the inner cam, use the tool (installer)
and a plastic hammer or the equivalent.
Install the special tool.
Use the plastic hammer to lightly tap around the special tool “A”
surface as shown in the illustration.
Installer : 58840-2137-0 (J-38194)
Note: Do not strike the inner cam gear teeth with the plastic
hammer.
Shim Selection
(1) Lower vehicle from hoist.
(2) Support lower link with floor jack, placing axle in normal
horizontal position.