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DAILY 4x4 ‒ GUIDELINES FOR BODYBUILDERS
CHASSIS INTERVENTIONS
2.4 WHEELBASE MODIFICATION
– Printed 692.68.999 – 3 Ed. - Base 08-2020
2.4 WHEELBASE MODIFICATION
2.4.1 General information
Note
Any wheelbase modifications that regard the electric circuits and/or relocation of the electric/electronic components requires IVECO
approval and must be carried out in compliance with chapter 5.7 instructions.
Usually, wheelbase modification must be performed on the standard wheelbase that is closest to the target value.
If the dimensions of the superstructure are suitable, it is best to use wheelbases in standard production; because this allows the use
of original propeller shafts and pre-defined crossbar positions and existing "datasets" for EVSC and AEBS (see Section 5 - Chapter
5.8 - Paragraph " Safety electronic devices ").
Nevertheless, IVECO must issue its authorisation for wheelbases below the minimum or maximum approved standard sizes on the
market.
2.4.2 Authorisation
Wheelbase modification is allowed without IVECO authorisation only when:
a) for extending
● another length included in production for the vehicle model is to be made;
● the thickness of the side member to be lengthened does not differ from a standard side member taken as reference, or it
differs (is lower) by just one "step" of the value (see Table 2.2);
● number, type and position of the cross members, the existing circuits and systems on the standard chassis are replicated taken
as reference.
b) for shortening
● another length included in production for the vehicle model is to be made;
● number, type and position of the cross members, the existing circuits and systems on the standard chassis are replicated taken
as reference.
The workshop that performs the transformation must provide sufficient guarantees in terms of technology and inspections (quali-
fied personnel, appropriate operational processes, etc.).
Note
The operations must be performed in compliance with these directives, taking into account the suitable adjustments and adapta-
tions, as well as all required precautions (e.g.: check whether the ECUs must be reparameterized, exhaust pipe adjusted, observ-
ance of minimum tare weight on the rear axle, etc.) provided for on the corresponding original wheelbases.
2.4.3 Impact on steering
Table 2.9 lists the maximum values of the wheelbase approved by IVECO.
▶ Extending the wheelbase will have a negative effect on steering.
Table 2.9 - Maximum wheelbase
Model
Suspension
front
(*)
Maximum load
on front axle
[kg]
Maximum load
on rear axle
[kg]
Maximum value
of wheelbase
[mm]
55C Quad-Tor 2450 3700 4175
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