Iveco DAILY M.Y. 2012, Инструкция для тренажера

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2-20
CHASSIS MODIFICATIONS D
AILY
Base — 02/2012 Printed 603.95.241
Modification of the wheelbase
- before welding check that the side members, including any part that was added, are perfectly aligned and then perform the control
measurement on the two sides and diagonally, as previously indicated.
Apply the reinforcements according to the instructions in paragraph 2.2.3.
Additional information
- Protect the surfaces from oxidation as specified in paragraph 2.3.2.
- Restore the braking and electrical systems according to what is specified in chapters 2.15 and 5.4.
- For operations on the transmission, follow the instructions in chapter 2.8.
2.4.6 Checking chassis stress
When lengthening the wheelbase, in addition to providing local reinforcement in corresponding of the side member joint, the
fitter must also foresee reinforcements in order to create, for the entire wheelbase length, resistance modules of a section no less
than what is foreseen by IVECO for the same wheelbase or the next highest one. Alternatively, if permitted by local regulations,
larger sized sections of the sub-frame may be adopted.
The fitter must check that the stress limits required by national regulations are observed. The stress may not exceed the stress on
the chassis in the original wheelbase, in the case of a uniformly distributed load and with the chassis considered as a beam placed
in correspondence of the suspension mounts.
If elongation is done starting from a longer original wheelbase, the reinforcements must be provided in function of not only the
amount of elongation but also of the type of bodywork that is created and the vehicle use.
2.4.7 Cross members
The need to use one or more cross members depends on:
- the amount of the elongation;
- the position of the transmission support;
- the welding area;
- the point of application of the forces coming from the superstructures;
- conditions of vehicle use.
If there is a supplementary cross member, it must have the same characteristics of the ones already on the chassis (resistance to
bending and torsion, material quality, connections to side members, etc.).
Figure 2.6 shows an implementation example.
An additional cross member must be provided for extensions greater than 600 mm.
In general, the distance between the two cross members must not exceed 1000
÷
1200 mm.
The minimum distance between two cross members, particularly for ”heavy duty use” must not be less than 600 mm; this limitation
excludes the ”light” cross member for transmission and shock absorber support.
Figure 2.6
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