CHASSIS MODIFICATIONS 2-39 E UROCARGO Euro 4/5 Installing a supplementary axle 2.7 Installing a supplementary axle The installation of an additional axle has heavy repercussions on the vehicle systems; in particular, it has a critical impact on the braking system, the compressed air system, the wiring harness and the MUX interconnection systems. Accordingly, the addition of an extra axle must be approved by IVECO and must be performed accord- ing to the instructions given in chapter 5 “Special instructions for electronic subsystems”. !
2.7.1 General specifications On certain models IVECO may authorise, upon request, the installation of a supplementary axle and, consequently, an increase in the total weight of the vehicle. The modification must respect the weight limitations and the conditions imposed by IVECO as well as all other conditions that may be imposed by national laws and such that are necessary to ensure the safety and proper functioning of the vehicle. Diagrams of the installation procedure may be submitted for inspection. These proposals must indicate the parts necessary to con- nect the axle to the chassis as well as the reinforcements to, and modifications of the chassis.
It is also necessary to submit diagrams showing the changes made to the systems. The specifications given in preceding paragraphs are to be followed for all modifications of the chassis. In view of the increased stresses due to the increase in permissible load, and in consideration of the different phases of the dynamic stresses in operation as a result of the different reactions on the chassis when the axle is added, it is necessary to provide appropriate reinforcements to the chassis. These reinforcements must in all cases satisfy all provisions of local applicable laws.
The chassis that has thus been modified must not be subject to flexural stresses greater than those of the original chassis in the corresponding sections. 2.7.2 Chassis frame reinforcement Figure 2.16 illustrates possible ways of modifying the chassis. The reinforcements must be continuous and must span the length of the entire frame of the vehicle up to the driver’s cab. For their attachment to the side member - when using L-bars - class 8.8 reinforcement bolts must be used and their diameter and distribution must be such to enable the section reinforcements to provide the required strength. Installing a supplementary axle Print 603.93.431 Base - January 2008