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DAILY 4x4 ‒ GUIDELINES FOR BODYBUILDERS
CHASSIS INTERVENTIONS
2.1 CHASSIS MODIFICATION STANDARDS
– Printed 692.68.999 – 3 Ed. - Base 08-2020
Precautions for alternators and electric/electronic components
In order to avoid damage to the rectifier diode, the battery must never be disconnected (or the isolator switch opened) while the
engine is running.
In cases where the vehicle must be started by towing (strongly discouraged), make sure that the battery is charged and connected
so as to ensure minimum supply voltage to the engine ECU.
Recharge the battery only after disconnecting it from the vehicle circuit. If the engine must be started-up with external charging
equipment, be sure to avoid using the "Start" function (should these devices feature this function) in order to avoid peak currents
that may damage electric and electronic components.
Start-up must be performed only via an external battery trolley, making sure that polarity is respected.
Earth connection
For further details on the connections to ground, see the Chapter 5.4 .
Braking and electrical systems
For additional details on the braking and electrical systems see Chapters 2.15 ( ➠ Page 36) and 5.4 .
2.1.3 Characteristics of the material used in chassis modifications
For modifications on the vehicle chassis (all models and wheelbases) and for applications of reinforcements on the side members,
the material used must correspond to the original frame material in terms of quality and thickness (see Tables 2.1 and 2.2).
If it is not possible to procure materials of the thickness indicated, materials having immediately higher standard thickness may be
employed.
Table 2.1 - Material to be used in chassis modifications
Name of steel
Breaking strength
[N/mm
2
]
Yield stress
[N/mm
2
]
Extending
IVECO Fe E420
530 420 21%Europe S420MC
Germany QStE420TM
Table 2.2 - Section dimension and chassis thickness
Class Type
Wheelbase
[mm]
Rear overhang
chassis
[mm]
A x B x t
Side member section
wheelbase area
[mm]
A x B x t
Side member section
rear overhang area
[mm]
55 - 70
truck
3080 935
144 x 69 x 5 184 x 69 x 5
3480 940
3780 1145
4175 1715
van
3595 855 / 1255
4175 1840
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