1997 ISUZU TFS SERIES Workshop Manual

4C1-74 FRONT WHEEL DRIVE
FRONT PROPELLER SHAFT
REMOVAL AND INSTALLATION
Since the propeller shaft assembly is carefully
balanced, a setting mark should be applied to
the flange before removal to indicate correct
position.Install the parts by aligning the setting marks
made at removal.
Removal Steps
1. Nut ; differential side
2. Bolt ; transfer side
3. Propeller shaft assembly ; rear side
4. Propeller shaft assembly ; front side
Installation Steps
4. Propeller shaft assembly ; front side
3. Propeller shaft assembly ; rear side
2. Bolt ; transfer side
1. Nut ; differential side
Important Operation - Installation
3. Propeller Shaft Assembly ; Rear Side
Align the indexing marks (about 3 mm dia. punched mark) on
the propeller shaft end and the splined yoke.

FRONT WHEEL DRIVE 4C1-75
2. Bolt ; Transfer Side
Torque N
m (kgfm/lbft)
Bolt size M10 62.8 3.9 (6.4 0.4/46.3 2.9)
1. Bolt ; Differential Side
Torque N
m (kgfm/lbft)
Bolt size M8 35.3 2.9 (3.6 0.3 / 26 2.2)

4C1-76 FRONT WHEEL DRIVE
DISASSEMBLY
Disassembly Steps
1. Snap Ring
2. Needle Roller Bearing
3. Spider4. Flange Yoke
5. Grease Fitting
Important Operation
2. Needle Roller Bearing
(1) Apply alignment marks (1) on the yokes of the universal
joint, then remove snap ring.
(2) Tap out the needle roller bearing by gently striking the
shoulder of the yoke, using a mallet or a copper hammer.

FRONT WHEEL DRIVE 4C1-77
INSPECTION AND REPAIR
Make necessary correction or parts replacement if wear, damage or any other abnormal conditions are found
through inspection.
Spider
Needle roller bearing
Yoke
Flange
Center bearing
Cushioning rubber
Bracket
Visual Check
Check the following parts for wear, damage or other abnormal
conditions.
Outside Diameter of Spider Pins
TF Side for Type - A and B mm(in)
Standard Limit
17.000 (0.669) 16.90 (0.665)
Axle Side for Type - A mm(in)
Standard Limit
14.724 (0.580) 14.624 (0.576)
Play in Splines in Normal Direction of
Rotation
Check the amount of play in the sleeve yoke and propeller
shaft splines in the direction of rotation, using a pointed feeler
gauge.
mm(in)
Standard Limit
0.074 - 0.156
(0.003 - 0.006)0.3 (0.012)

4C1-78 FRONT WHEEL DRIVE
REASSEMBLY
Reassembly Steps
1. Flange yoke
2. Spider
3. Needle roller bearing4. Snap ring
5. Grease Fitting
Important Operations
3. Needle roller bearing
(1) Install spider to flange yoke. Be sure to install the spider by
aligning the setting marks made during disassembly.
(2) Apply a molybdenum-disulfide grease or a multi-purpose
type grease NLGI No.2 to inside of the bearing cap.
Grease Amount: Approx. 1.2g (0.042 oz)
(3) Using either mallet (or copper hammer) or a press, install
the needle roller bearing into the yoke so that the snap ring
can be installed in its groove.
CAUTION:
The needle roller bearing cannot be installed smoothly if it
is set at an incorrect angle with the flange and excessive
hammering will damage the needle roller bearing.

FRONT WHEEL DRIVE 4C1-79
(4) Align setting marks (1) and join the yokes.
(5) Install snap ring.
NOTE:
Discard used snap rings and install new ones.
When the bearing cap is in position, select and attach a snap
ring of suitable thickness so that the end play of the spider pin
is held within 0.1mm (0.004 in).
T/F side for Type - A and B
Snap ring thickness and Identification color
1.5mm (0.059 in); Blue
1.53mm (0.060 in); White
1.59mm (0.063 in); Yellow
1.62mm (0.064 in); Green
1.68mm (0.066 in); Not colored
Axle side for Type - A
1.44mm (0.057 in); Not colored
1.49mm (0.059 in); Not colored
1.54mm (0.061 in); Not colored
NOTE:
Be sure to use snap rings of the same thickness on both sides.

4C1-80 FRONT WHEEL DRIVE
TROUBLESHOOTING
Refer to this Section to quickly diagnose and repair front axle problems. Each troubleshooting chart has three
headings arranged from left to right.
(1) Checkpoint (2) Trouble Cause (3) Countermeasure
This Section is divided into ten sub-sections:
42 Model
1. Wanders and pulls
2. Front wheel shimmy
44 Model
1. Oil leak at front axle
2. Oil leak at pinion shaft
3. Noises in front axle drive shaft joint
4. Noises in front axle
5. Wanders and pulls
6. Front wheel shimmy
7. Automatic locking free wheel hub
1) Does not lock or locks only on one side
2) Does not freewheel or freewheels only to one side
3) Noises in automatic locking free wheel hub
Propeller shaft
1. Noise
2. Vibration

FRONT WHEEL DRIVE 4C1-81
42 Model
1. WANDERS AND PULLS
Checkpoint Trouble Cause Countermeasure
Adjust the wheel bearing
preloadToo tight NG
SuspensionTighten or replace
Replace or adjust the inflation
Adjust the steering gear out of
adjustment or replace
Adjust the front alignment
Front or rear suspension parts
loose or broken
TireW orn or improperly inflated
Incorrect or broken
Front alignmentIncorrect
Steering linkage
Steering gear out of
adjustment
Tighten or replaceLoose or worn
OK
NG NG NG NG NG
OK OK
OK
OK
W heel bearing preload