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DAILY MCA2014 4x4 ‒ BODYBUILDER INSTRUCTIONS
CHASSIS INTERVENTIONS
2.1 GENERAL CHASSIS MODIFICATION STANDARDS
– Printed 603.95.994 – 1 Ed. - Base 05/2015
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
The original earth connections of the vehicle should never be altered; in cases where these connections must be moved or new
connections added, use the holes present on the chassis to the extent possible, taking care to:
● mechanically remove - either by filing and/or with a suitable chemical based solution - the paint on both the chassis and ter-
minal side, thus creating a contact surface free of indentations and edges;
● paint the area between the terminal and metal surface with a suitable high conductivity paint.
● connect to earth within 5 minutes after application of the paint.
For ground connections at the signal level (e.g. sensors or devices with low absorption), absolutely never use standardised IVECO
M1 points (ground connection of the batteries), M2 or M8 (grounding the starter motor, depending on the position of the guide)
and connect the signal cable ground on points separate from the power cables and wires that serve as radio frequency screens.
Avoid earth connections between devices in a concatenated fashion for electronic equipment; install individual earth connections of
optimal length (favour the shortest routes).
Braking and electrical systems
For additional details on the braking and electrical systems see Chapters 2.15 ( ➠ Page 28) and 5.4 .
Characteristics of the material used in chassis modifications
For chassis modifications on the vehicle (all models and wheelbases) and for applications of reinforcements on the side members,
the material used must correspond to the original chassis 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
]
Elongation
IVECO Fe E490
610 490 23%Europe S355J0W
Germany QStE500TM
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