tires ISUZU TF SERIES 2004 User Guide

POWER-ASSISTED STEERING SYSTEM 3B-9

4. Install all the lines and hoses. Fill the system with
new power steering fluid and bleed the system as
described in Bleeding The Power Steering System.
Operate the engine for about 15 minutes.
Remove the pump return line at the pump inlet and
plug the connection on the pump. While refilling the
reservoir, check the draining fluid for contamination.
If foreign material is still evident, replace all lines,
disassemble and clean or replace the powe
r
steering system components. Do not re-use any
drained power steering fluid.

Steering Wheel Free Play Inspection
060R300016
1. With the tires in the straight-ahead position, check
the amount of steering wheel play by turning the
wheel in both directions until the tires begin to move.
NOTE: The wheel free play should be checked with the
engine running.
Free play: 0 - 30 mm (0 - 1.18 in)
2.
Also check the steering wheel for play and
looseness in the mount by moving it back and forth
and sideways. When test driving, check for hard
steering, steering shimmy and tendency to pull to
one side.

Front End Alignment Inspection and
Adjustment
Toe-in Adjustment
Toe-in: Refer to Section 3A FRONT ALIGNMENT
1. To adjust the toe-in angle, loosen the lock nuts (2)
on the tie rod (1) and turn the tie rod. Turn both rods
the same amount, to keep the steering wheel
centered .
This illustration is based on the RHD model.
431R30006
2. Tighten the lock nut to the specified torque.
Torque:
92 - 104 N




m (9.4 - 10.6 kg




m/68 - 77 lb ft)

3C-54 FRONT SUSPENSION
TROUBLESHOOTING
1. VIBRATION, SHOCK, AND SHIMMY OF STEERING WHEEL

Checkpoint Trouble Cause Countermeasure



Check front axle


Check wheel alignment


Check suspension ball joint


Check shock absorber or
attaching nut and bolt


Replace


Adjust


Replace


Replace or retighten


Check steering unit and
linkage


Faulty


Worn


Malfunction or loose


Check upper and lower link
bushings
Replace


Adjust


Worn


Incorrect

OK OK OK
NG NG NG NG NG NG
OK OK
Check vehicle trim height





Improperly adjusted or worn front
wheel bearing.


Worn or incorrectl
y adjusted wheel
bearing.
Replace; refer to Section 4C "Front
Wheel Drive"


Insufficientl
y tightened steeringgear housing.


Wear of steering linkage.


Excessive backlash due to
improper ad
justment of the steeringgear box.

Worn column bearing weakened
column bearing spring, or loose
clamp.
Replace; refer to Section 3B
"Steering"


Improper tire pressure.

Imbalance and deformation of frond
wheel.


Unevenl
y worn tire or insufficient
tightening of wheel nuts.
Replace; refer to Section 3E "Wheel
and Tires"

FRONT SUSPENSION 3C-63
8. EXCESSIVELY OR PARTIALLY WORN TIRE

Checkpoint Trouble Cause Countermeasure

Brake adjustment
Wheel alignment
Adjust
Adjust
Incorrect
Incorrect
Front wheel bearingReplace
Adjust
Faulty
Improper
OK
NG NG NG NG
OK OKTire pressure
Tire rotationRotate tires at recomended
intervalsNot rotated OK
NG

3D-16 REAR SUSPENSION
4. HARSHNESS

Checkpoint Trouble Cause Countermeasure


Bushings in suspension
System


Tire inflation pressure


Retighten or replace


Replace


Adjust


Loosen or broken


Defective


Incorrect


Tires for out of balance

Adjust or replace


Replace tires


Incorrect

Noise does not have any
specific pattern

OK
NG NG NG NG NG
OK OK Road test vehicle(Noise has a
certain pattern)

WHEELS AND TIRES 3E-1

SECTION 3E
WHEELS AND TIRES
TABLE OF CONTENTS
PAGE
Main Data and Specifications ........................................................................................... 3E- 2
Torque Specifications ....................................................................................................... 3E- 3
Special Parts Fixing Nuts and Bolts ............................................................................ 3E- 3
Wheels and Tires ...............................................................................................................3E- 4
General Description ...................................................................................................... 3E- 4
Servicing ........................................................................................................................ 3E- 6
Disassembly and Reassembly ..................................................................................... 3E- 7
Inspection and Repair................................................................................................... 3E- 8
Troubleshooting ................................................................................................................3E- 10

3E-2 WHEELS AND TIRES

MAIN DATA AND SPECIFICATIONS
Tire Size and Pressure
Model 4




2 Except HIGH RIDE SUS 4




2 HIGH RIDE SUS, 4




4
Tire Size



Wheel Size

Tire Pressure

Front
kg/cm
2 (psi/kPa)

Rear
kg/cm2 (psi/kPa)195R14C
8PR 106/104Q


14 x 5.5J


2.5 (36/250)
4.5 (65/450) 215/70R15C
106/104S


15 x 6.5JJ


2.25 (33/225)
3.75 (54/375) 225/75R15C
110/108S


15 x 6.5JJ


2.25 (33/225)
3.25 (47/325) 245/70R16
111S


16 x 7JJ


2.0 (29/200)
2.8 (41/280)

WHEELS AND TIRES 3E-3

TORQUE SPECIFICATIONS
SPECIAL PARTS FIXING NUTS AND BOLTS
WHEELS AND TIRES
kgf

m (lb

ft/N

m)

3E-4 WHEELS AND TIRES

WHEELS AND TIRES
GENERAL DESCRIPTION

TIRE DESIGNATION

WHEELS AND TIRES 3E-5

TIRE PRESSURE LABEL (LOCATION : DRIVERS DOOR OR FRAME OF DRIVERS DOOR)

4




2 Except HIGH RIDE SUS
SEE OWNERS AND
DRIVERS MANUAL FOR
ADDITIONAL INFORMATION 4




2 HIGH RIDE SUS, 4




4

SEE OWNERS AND
DRIVERS MANUAL FOR
ADDITIONAL INFORMATION
TIRE PRESSURE : kg/cm
2 (PSI) TIRE PRESSURE : kg/cm2 (PSI)
TIRE FRONT REAR
TIRE FRONT REAR
195R14C8PR 2.5 (36) 4.5 (65)
225/75R15C
2.25 (33) 3.25 (47)
215/70R15C 2.25 (33) 3.75 (54)
245/70R16 111S2.0 (29)
2.8 (41)


Note :

 
The air pressure of the tire should be maintained as indicated in the label instruction on the driver's
door or frame of driver's door.
Lower pressure can cause burst and adverse vehicle handling.
On the other hand, higher pressure can cause shock-burst and reduce gripping effect.

3E-6 WHEELS AND TIRES

SERVICING
Servicing refers to general maintenance procedures to be performed by qualified service personnel.





WHEEL NUT TORQUES
Wheel Nut Torque kgf
m(lb
ft/N
m)
12.0  1.0 (86.8  7.2 / 117.7  9.8)




TIRE ROTATION
For of radial tires, interchange the front and the rear wheels on
the same side as shown in the figure.




If one-sided tire wear appears on radial tires, rotate the wheels
as shown in the figure.

Note:
After rotation, adjust the front and rear tire pressure and be sure to check wheel nut tightness.