oil ISUZU TFS SERIES 1997 Service Manual

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 4C1-57
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)

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.

4C1-66 FRONT WHEEL DRIVE
FRONT HUB AND DISC (Manual Locking Hub)
DISASSEMBLY
Disassembly Steps
1. Bolt
2. Housing assembly
3. Snap ring and shim
4. Body assembly
5. Lock washer
6. Hub nut
7. Hub and disc assembly
8. Outer bearing
9. Oil seal
10. Inner bearing
11. Clutch assembly12. Snap ring
13. Knob
14. Compression spring
15. Follower
16. Retaining spring
17. Detent ball and spring
18. X-ring
19. Snap ring
20. Inner assembly
21. Snap ring
22. Ring
23. Spacer

4C1-68 FRONT WHEEL DRIVE
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
Free wheeling hub parts
(Option)
Clutch, knob, follower, inner, ring and
spring
Visual Check
Check the following parts for wear, damage or other abnormal
conditions.

FRONT WHEEL DRIVE 4C1-69
REASSEMBLY
Reassembly Steps
1. Spacer
2. Ring
3. Snap ring
4. Inner assembly
5. Snap ring
6. X-ring
7. Detent ball and spring
8. Knob
9. Snap ring
10. Retaining spring
11. Follower
12. Compression spring
13. Clutch assembly
14. Outer bearing
15. Inner bearing
16. Oil seal
17. Hub and disc assembly
18. Hub nut
19. Lock washer
20. Body assembly
21. Snap ring and shims
22. Cover assembly
23. Bolt

FRONT WHEEL DRIVE 4C1-71
14.Outer Bearing
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)
15.Inner Bearing
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)
16.Oil Seal
Installer : 5-8840-2120-0
(J-36830)
Grip : 5-8840-0007-0
(J-8092)
17.Hub and Disc Assembly
(1) Apply grease in the hub.
(2) Apply grease (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)
18.Hub Nut
(1) 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)

4C1-72 FRONT WHEEL DRIVE
Preload Adjustment
Tighten the hub nut at 29.4 Nm (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.
19.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.
20.Body Assembly
Apply adhesive (Loctite 15 or equivalent) to the both joining
faces.
21.Snap Ring and Shims
Adjust the clearance between the free wheeling hub body 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)
22.Cover Assembly
Align stopper nails to grooves of body.