Iveco NEW DAILY, Instructions Manual

Page: 55 / 240

NEW DAILY
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CHASSIS INTERVENTIONS
CHASSIS INTERVENTIONS
2.9 WORK ON SUSPENSIONS
31
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Printed 603.95.789
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1 Ed. - Base 02/2014
2.9 WORK ON SUSPENSIONS
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Modifications to the suspensions and springs (e.g. addition leafs, variations in camber, etc...) af-
fect the driving safety of the vehicle and inasmuch may only be implemented after obtaining ap-
proval from IVECO.
In general, work on parabolic suspensions is not allowed. On vehicles with this type of suspension spring, exception is made for set-
ups or special uses for which, in order to increase suspension rigidity, the application of rubber elastic elements may be authorised.
In exceptional cases and for specific uses, the possibility may be evaluated of allowing the addition of extra leaf springs on the para-
bolic springs; this must be carried out by a specialised spring manufacturer after approval by IVECO.
It is not allowed to use a parabolic spring on one end of the axle and a semi-elliptic string on the other end.
For vehicles equipped with the optional “Braking corrector for braking system”, modifications of the rear suspension also require
modification of the corrector (see Paragraph "Braking corrector (
➠
Page 50) ").
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On vehicles equipped with an ESP system, modifications of the suspensions are not permitted.
See Chapter 2.15 - Paragraph "Derating of the ESP System".
Converting from mechanical to air-operated suspension
This type of conversion is extremely critical since it involves vital groups and components for the active safety of the vehicle; so,
technical approval is required from IVECO.
Moreover, such conversion requires the exclusive use of solutions (layout, groups and finalisation) in use for routine production
and in any case IVECO is waived from any liability.
Camper 35C, wheelbase 3750 mm or 3950 mm, lightened chassis
Following approval by IVECO, adaptations are allowed of the original mechanical suspension by adding air-operated bellows of
appropriate dimensions. The maximum inflation pressures envisaged by the manufacturer must be strictly observed in order to
avoid excessive vehicle stiffness and consequent reduction of comfort and driving performance.
Note Adaptation of the suspension assumes a corresponding adaptation of the ESP system controlling stability (see Paragraph "Derating
of the ESP system" (
➠
Page 54)).
Modifications to the air-operated suspension (shop van outfit)
After approval by IVECO, modifications of the original air-operated suspension are allowed.
Modifications to the rear suspension (only vehicles with braking corrector)
Modifying the spring characteristics of the rear suspension (e.g. n
°
of leafs, intervention loads, etc.) also requires adapting braking
corrector adjustment data. If, on the other hand, the vehicle is equipped with ABS no adjustment is necessary.
When action on the suspension is caused by significant axle load variations or variations in the overall mass of the vehicle, it may
also be necessary to adapt the braking forces to ensure compliance with legal requirements. The authorisations issued by IVECO
list the necessary indications.
On the other hand, if the modification of rear spring characteristics does not envisage load variations on the axles and overall mass,
modification of braking corrector calibration can be performed by an Authorised Workshop.
To avoid altering the vehicle's braking capacity in various load conditions, the “load on ground/braking pressure” ratio indicated on
the specific corrector plate must be observed.
To adjust the latter, proceed as indicated in Paragraph "Braking corrector" (
➠
Page 50), envisaging for the load to be applied at
hole (9) a value matching the stiffness characteristics of the new spring.
If it is not possible to comply with this ration in all load conditions, contact IVECO for a new check of compliance with legal require-
ments.
The variation of the corrector data indicated on the plate requires replacement with a new plate indicating the new data.