Iveco Daily Euro 4. Manual - part 165

Using the level (4) arrange horizontally the detectors (3) and
fix them to their position with the screw (2).

Move the slide rules (1) until they are centred by the light signal
transmitted by the detector (3) and note down the values.

Press the push-button ”out of centre” (1) for at least two
seconds, the display (3) shows nine lines.

Manually rotate the wheel slowly in the running direction and
project the light signal on the slide rule scale (5).

Stop the wheel when the signal read on the slide rule (5) has
reached the maximum value and note down the value (e.g. 12).

Rotate the wheel again until the minimum value is reached and
note it down (e.g. 8).

Calculate the mean value of the amplitude: 12 + 8 = 20 : 2 =
10 and position the wheel on the mean value calculated
marking its position.

Press the push-button ”out of centre ” again (1) until the LED
(4) of the wheel camber is lighted and on the display (3) a
fictitious value is shown.

Repeat the operations on the other wheel.

Lower the vehicle so that the wheels, in the position previously
marked, completely rest at the centre of the floating discs (9).

Loosen the floating discs (9) from their bases extracting the
pins (10).

Figure 12

Figure 13

Figure 14

Press the brake pedal locking it with the suitable tool (1)
positioned against the seat.

Wheel alignment

Electronic balancing of rim eccentricity

Connect the detectors plugs (7) to the transformer (6) and
switch on the switch (8); loosen the locking screw (2) of the
detector and lift the detector lens guard (7).

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Make sure that the laser beam does not hit the eyes
of people, it will severely damage their sight.

The wheels must be braked during the whole
measuring cycle.

NOTE

WHEEL GEOMETRY

AILY

URO

The positive or negative toe-in adjustment is carried out as
follows:

Loosen the nuts (3) on the joint heads (2, right and left).

Turn tie rods (1) up to obtain the toe-in of each wheel equal
to half of the prescribed value.

Then tighten the nuts (3) to the prescribed torque.

Front wheel deviation test (vehicle wheelbase
check)

The front wheel deviation test and toe-in reading are carried
out at the same time.
The partial toe-in values, to be detected on the proper
straightedges divided into millimetres, must have the same
value and their sum must correspond to the whole toe-in
value.
If between the readings there is a difference (e.g.: -2 and + 3),
it means that there is a deviation between the two wheels: a
wheel onward as to the other wheel, equal to 5 lines of the
toe-in scale.
The number of lines is calculated by the algebraic sum
[+3-2(-1)=5] or counting the lines included between the two
values.

If the values are different, steer the wheels until the light signal
indexes are set to two values equal (A) and exactly the mean
value of the two previous readings.

In this way a perfect wheel alignment is obtained.

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Figure 15

Figure 16

Figure 17

Figure 18

Keeping the detectors in horizontal position and the wheels
perfectly aligned, move the lens guard (2) using the lever (1)

Operate the lever (3) and direct the light signal index on the
slide rule scale (4) corresponding to the rim diameter.

Repeat the same operations on the opposite detector and
read the toe-in value on the scales (in millimetres): the result
of the algebraic sum of the two values must be the prescribed
value.

Checking toe-in

WHEEL GEOMETRY

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URO

For vehicles with transverse leaf spring

suspension:

The deviation error may be due to deformation of the frame
or of the assemblies connected to the wheels.

Each line corresponds to a deviation of 2 mm, so the deviation
between the two wheels is equal to 10 mm (5 x2).

For vehicles with torsion bar suspension:

After determining which is the defective wheel, check its
conditions and the exact assembly dimension of the upper and
lower tie rods of the wheel suspension.

If the tie rods have been subject to deformations, replace
them; if the assembly dimension is wrong, screw or unscrew
the tie rod on the king-pin so that the vehicle wheel base is
adjusted and the wheel are on the same axis.

Steer the wheels 20

° toward the outside, press the king-pin

camber push-button (2) and the display (1) shows the king-pin
camber angle.

Steer the wheel 20

° toward the inside; press twice the king-pin

camber push-button (2), the LED lights up and the display (1)
shows 9 horizontal lines.

When the front wheels are aligned to the rear ones, loosen
the knurled knobs (3) and zero the graduated sector (2) on
the index (1) of the floating disc.

When the front wheels are aligned to the rear ones and the
detectors are on an horizontal plane, press the key wheel
camber (2) the LED lights up and the display (1) shows the
camber angle value.

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Figure 19

Figure 20

Figure 21

Figure 22

Checking camber

Checking king-pin angle and caster angle

In order not to change wheel caster angle, a
lengthening or shortening of the lower tie rod must
correspond to a lengthening or shortening of the
upper tie rod.

NOTE

WHEEL GEOMETRY

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- under the above conditions, check on the other wheel

that the steering angle value is as expected;

- reverse steering and check again.

If different values are found, possible causes can be:

- wrong centering of the steering box;

- deformations caused by impacts;

- deviation error between axles (front and rear axles)

higher than 20 mm.

- Steer the wheels until the floating disc index of the wheel

inside the bend in correspondence with the prescribed
steering angle.

For regulating the caster angle proceed as follows:

- set wheels in a straight running condition;

- press the kingping angle button until its relevant LED starts

blinking;

- screw and unscrew, as required, lower tie rod joint head,

considering that the joint head can’t carry out more than
one turn.

Without moving the wheel, press the caster angle
push-button (2), the LED lights up and the display (1) shows
the caster angle value.

Repeat these operations on the other wheel.

This check is carried out during the king-pin camber check of
during the caster angle check, making the following operations:

- if the prescribed steering angles exceed 30

°, the mark

°(1) on the floating disc (2) and the mark 30° (3) on

the graduated selector (4) mast be considered as initial
reference values.

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Figure 23

Figure 24

Checking steering angles

Apply the slide rule (1) to the front wheels checking that the
cursor (2) is exactly in the middle of the two ring splines of the
shaft (3)

Apply the detectors to the rear wheels and proceed as already
described for the front axle wheels.

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Figure 25

Checking rear axle alignment

The king-pin camber angle and the wheel caster
angle are stored, after detection, by the instrument
and can be recalled when necessary pressing the
push-button relevant to the concerned angle.

NOTE

For steering angles higher than 30

°, it is necessary to

consider as reference index the mark 20

° (1).

NOTE

WHEEL GEOMETRY

AILY

URO

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