Iveco Stralis AT/AD. Manual - part 234

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The steering control is equipped with a pneumatic device to
adjust the angle and height of the steering wheel.
The position of the steering wheel is adjusted by pressing the
push-button on the floor of the cab:

- Press the button (3) on the floor: the pressurized air of

the services system is sent to the steering wheel
adjustment assembly (2) releasing it.

- Manoeuvre the steering wheel (1) into the required

position (longitudinal travel along the axis of the steering
column 60 mm, angular travel to the vertical 40

°).

- Release the button on the floor.

Figure 15

STEERING

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STEERING CONTROL

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Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Lift the cowling of the cab. Set the wheels straight and check
that the steering box is in the ”straight ahead” position, so the
reference mark

⇐ of the shaft (1) coincides with the

reference mark

⇒ of the steering box (2).

Engage the steering lock by taking the ignition key out.
Take the cover (1) off the steering wheel (2).

Disconnect the connection (4) of the earth cable.
Remove the nut (1), mark the assembly position of the
steering wheel (3) on the shaft (2) and remove the steering
wheel (3).

Take out the screws (1 and 3) and take off the side guards
(2.4).

Disconnect the electric connections (5 and 6). Take the key
(5, Figure 18) out of the steering wheel (3, Figure 18). Fasten
the cover (1) of the interconnecting box (2) to the box by
inserting the key (7) in the slots (8 and 9). This prevents the
cover (1) and the box (2) from turning on each during
disassembly and this condition is maintained until assembly.
If there is no key (7), use a screw and nut of suitable length
and diameter.
Take hold of the interconnecting box (2), lift it carefully so
that the retaining spring pins (3) come out of the mounting
(4) and put it aside.

Remove the interconnecting box (2) from the
steering control mounting (4), keeping strictly to the
procedures described hereunder. This is to prevent
damaging the spiralled cable in the box, during
assembly, and to avoid a wrong reading of the
steering wheel angle.

Removal

501410

REMOVING-REFITTING

THE

STEERING CONTROL ASSEMBLY

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Figure 21

Figure 22

Figure 23

Figure 24

Figure 25

Figure 26

Remove the push-button panels (3 and 5) and the caps for
the screws (4) from the instrument panel (1).
Take out the screws (2 and 4), remove the instrument panel
(1) and put it aside.

Disconnect the connections (1) of the windscreen wiper, (2)
of the drive control system, (3) of the immobilizer.

Take out the screws (2), remove the sill board (1) and lift the
mat (3).

Remove the screws (1 and 3) and the guard (2).

Mark the assembly position of the shaft (2, Figure 18) on the
mounting (3) and on the universal joint (4). Loosen the screw
(1) and extract the universal joint (4) from the top shaft.
Disconnect the pipe (2).

Take out the 3 screws (1) and remove the steering control
mounting (3) from the pedal board (2).

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Figure 27

Figure 28

From outside the cab, loosen the screw (2) and disconnect
the bottom shaft (1) from the power steering (3) shaft. Take
out the screws (4) and remove the bottom shaft (1) together
with the guard (5).

To refit, carry out the operations described for removal in
reverse order, tightening the screws and/or nuts to the
required torque.

Refitting

The interconnecting box (1) is supplied as a spare
with the stop key assembled as illustrated in the
figure.
After fitting it on the steering control mounting, it is
necessary to turn the key (2) so as to cause it to
break at the point shown by the arrow and put the
key in the steering wheel housing, see Figure 18.

Changing the pneumatic cylinder
Removal

Remove the steering gear assembly as described under the
relevant heading (operation 501410).
Remove the damper (1) by taking out the fixing nuts (2 and
3).

Figure 29

Figure 30

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Screw a suitable coupling (5) into the air supply hole of the
cylinder (3) and introduce air at a pressure of 8

÷ 12 bars.

The air pressure must be maintained throughout
removal: this is a necessary condition to make sure
the pneumatic cylinder (3) gets released.

Shift the steering gear shaft-assembly (6) completely
outwards (

→).

Mark the assembly position of the screw (7) on the mount
(9). Remove the nut (1), extract the screw (7) with the
washers (2 and 8) and remove from the mount (9) the
pneumatic cylinder (3) the adjustment washer (4) and the
steering gear shaft assembly (6).

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