ISUZU TF SERIES 2004 Workshop Manual

FRONT ALIGNMENT 3A-5
The follow illustration shows the alignment procedure.
RTW340LF000401

3A-6 FRONT ALIGNMENT
Example
Measured value
Camber angle 1
10' Caster angle 3
10'
Standard value
Camber angle 0

30' Caster angle 3

35'
45'




RTW340SH001001

1. Mark an ‘A’ at the intersection point of the measured
camber angle value (solid line) and the measured caster
angle value (dotted line).






RTW340SH001101

2. Mark a ‘B’ at the intersection point of the standard camber
angle value (solid line) and the standard caster angle value
(dotted line).





RTW340SH001201

3. The vertical distance between points ‘A’ and ‘B’ represents
the adjustment required at the front cam. The horizontal
distance between points ‘A’ and ‘B’ represents the
adjustment required at the rear cam.
In this example, the front cam would be moved 5 integers to
the positive and the rear cam would be moved 8 integers to
the positive.

CAUTION:
Maximum possible adjustment from the center point of the
cams is 9 integers to either side.

FRONT ALIGNMENT 3A-7

CASTER
3

35'
45'
Note:
Left and right side to be equal within 30'

CAMBER
0

30'
Note:
Left and right side to be equal within 30'

KING PIN INCLINATION
12

30'
30'

3A-8 FRONT ALIGNMENT




Toe-in Adjustment
Measurement should be taken with the vehicle on a surface
plate.
If a surface plate is not available, toe-in should be checked
with the vehicle parked on a level floor.
1. Set front wheels to straight ahead position.
2. Align the toe-in gauge with center height of each wheel a
t
front end.
3.
Apply center marks to each wheel, then take measurement
of distance A between the center marks on each wheel.
4. Slowly move the vehicle rearward until the center marks
reach the rear end position.
5. Take measurement of distance B between the cente
r
marks at rear end.
The toe-in can be calculated with next formula.
Toe-in = B - A
Toe-in mm (in)

4

2
(Except high ride suspension) 0
2 (0
0.08)





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.
Lock Nut Torque N
m (kgf
m/lb
ft)
986.0 (10.00.6 / 72.34.3)

RTW330SH000101

Trim Height
Trim Height : at Curb Weight (Reference Data)
Trim height (Z) = A - B
Front mm (in)

Z
105(4.13)

FRONT ALIGNMENT 3A-9

RTW340SH001301-X

FRT Buffer clearance (Reference Data)

4
2 (Except high ride suspension)
25.9(1.02)


RTW340SH000101-X

RR Buffer clearance (Reference Data) mm(in)

4

2 (Except high ride suspension)
82.1 (3.23)



MAXIMUM STEERING ANGLE

4

2 (Except high ride suspension)
Outside wheel 33.5

Inside wheel 37.1

3A-10 FRONT ALIGNMENT
Alignment for 4





2 (High Ride Suspension) and 4





4
Caster and camber Adjustment
The camber angle and caster angle can be adjusted by means of the camber shims and caster shims installed in
position between the chassis frame and fulcrum pins.
RTW340LF001901

Legend

1. Camber shim
2. Caster shim
3. Upper link ASM RH
4. Lower link ASM LH
5. Adjust cam

FRONT ALIGNMENT 3A-11
Adjust Method
addition / subtraction of shim front side rear side move direction
of upper b/j caster angle
alteration camber angle alteration
addition subtraction a decrease de crease (to negative
direction)
subtraction addition b increase in crease (to positive
direction)
no change subtraction c decrease no alteration
caster
adjustment
no change addition d increase no alteration
addition e no alteration de crease (to negative
direction) camber
adjustment
subtraction f no alteration in crease (to positive
direction)





Note:
1. Adjust cam is set initial position (the hole & projection
are upward as shown in a illustration) before a shim
adjustment.
2. Difference of caster shim front/rear thickness shall be
3.6mm(0.142in) or less.
Overall thickness of caster shim and camber shim be
10.8mm(0.426in) or less.
3. Make a combination in a such a way that number of
shims becomes minimum.





Fulcrum Pin Bolt Torque N
m (kgf
m/lb
ft)
152.0
15 (15.5
1.5 / 112.1
10.8)





CASTER
3

10’
45’
Note:
Left and right side to be equal within 30’.





CAMBER
0

30’
Note:
Left and right side to be equal within 30’.

KING PIN INCLINATION
12

30’30’

3A-12 FRONT ALIGNMENT




Toe-in Adjustment
Measurement should be taken with the vehicle on a surface
plate.
If a surface plate is not available, toe-in should be checked
with the vehicle parked on a level floor.
1. Set front wheels to straight ahead position.
2. Align the toe-in gauge with center height of each wheel a
t
front end.
3.
Apply center marks to each wheel, then take measurement
of distance A between the center marks on each wheel.
4. Slowly move the vehicle rearward until the center marks
reach the rear end position.
5. Take measurement of distance B between the cente
r
marks at rear end.
The toe-in can be calculated with next formula.
Toe-in = B - A
Toe-in mm (in)

4
2 (High ride suspension)
4
4 02 (00.08)






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.
Lock Nut Torque N
m (kgf
m/lb
ft)
986.0 (10.00.6 / 72.34.3)

RTW330SH000201

Trim Height
Trim Height : at Curb Weight
Trim height (Z) = A - B
mm (in)

Z
140
5 (5.51)

FRONT ALIGNMENT 3A-13


450R100002-X

FRT Buffer clearance (Reference Data)

4
2 (High ride suspension), 4
4
29.7(1.17)

Adjustment
Adjust the trim height by means of the adjusting bolt on the
height control arms.
1. Check and adjust the tire inflation pressures.
2. Park the vehicle on a level ground and move the front of the
vehicle up and down several times to settle the suspension.

410RS001

3. Make necessary adjustment with the adjusting bolt on the
height control arms.



RTW340SH000201-X

RR Buffer clearance (Reference Data) mm(in)

4

2 (High ride suspension), 4

4
80.0 (3.15)

3A-14 FRONT ALIGNMENT
MEMO