CHASSIS MODIFICATIONS 2-48 E URO C ARGO E URO 4 - 5 Work on the Suspension 2.12 Changes to the Suspension Company authorisation must be obtained to re-work the suspension systems and springs (e.g. additional spring leaves, different cambering etc.) since these are important components for the operation of the vehicle. ! As a general rule no modification of the parabolic springs is permitted. On vehicles equipped with these springs, installation of elastic rubber components may be authorised for special versions or uses in order to increase the stiffness of the suspension.
In very specific cases, and for specific uses, the possibility of adding an extra leaf to the parabolic spring may be evaluated. This operation should be carried out by a specialised firm following approval by IVECO. It is not possible to use a parabolic spring on one side of an axle and a semi-elliptic type spring on the other side of the same axle. 2.12.1 Change from mechanical to pneumatic suspension Modifications of this kind are generally authorised for the rear axle only. Modification proposals presented by bodybuilders to the Company may be examined upon submission.
The responsibility for the dimensions of the air actuated springs and their installation, for the torsion bars, the effectiveness of the suspension and their effect on the behaviour of the vehicle and the pneumatic supply system rests solely with the firm that has carried out the modification. Suspension and anchoring components are very important to vehicle safety so that the firm carrying out the modification must undertake the necessary design and testing. The air tank for the suspension must be connected to the circuit of the vehicle in compliance with the instructions given in point 2.20. Work on the Suspension Base - July 2006 Revi - June 2007 Print 603.93.431