Iveco NEW DAILY Instructions Manual Download

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NEW DAILY

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CHASSIS INTERVENTIONS

CHASSIS INTERVENTIONS

2.4

WHEELBASE MODIFICATION

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Printed 603.95.789

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1 Ed. - Base 02/2014

2.4

WHEELBASE MODIFICATION

General information

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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 drive shafts and pre-defined crossbar positions.
Nevertheless, IVECO must issue its authorisation for wheelbases below the minimum or maximum approved standard sizes on the

market.

Authorisation

Wheelbase variation in the 4x2 versions is allowed without IVECO authorisation only when:

●

the target wheelbase is listed in the catalogue for the type of vehicle being transformed;

●

the structure (area of side members; number, type and position of the crossbars), the existing circuits and systems on the

series chassis corresponding to this length will be replicated.

When these conditions do not exist in combination at the same time, which ensure that the schematics of the transformed frame is

equal to that of the original, the modification must undergo approval.
The workshop that performs the transformation must provide sufficient guarantees in terms of technology and inspections (quali-

fied personnel, appropriate operational processes, etc.).
For the 4x4 versions, variation in the wheelbase is only allowed with specific approval from IVECO.
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.

Effects on steering

Generally speaking, extending the wheelbase will have a negative effect on steering.
When required by standard, the maximum thresholds for cornering path, steering wheel force and relative time to negotiate

curves should not be exceeded (e.g.: ECE Regulation of EC Directive in force).
Table 2.9 lists the maximum wheelbase elongation values allowed for the vehicle with series steering, maximum load and tyres.
Longer wheelbases require approval and technical solutions must be adopted to improve steering, such as reduction of maximum

load on the front axle or the implementation of a caster trail with a restricted set of values.
The installation of an additional pump must also be authorised, while successive installations require the participation of the special-

ised Company.

Table 2.9 - Maximum permitted wheelbase extension

Model

Front suspension

Maximum Wheelbase

[mm]

33S, 35S

Crossways leaf spring

4100

35C, 40C

Crossways leaf spring

4100