2-42 CHASSIS MODIFICATIONS E UROCARGO Euro 4/5 2.7.5 Application of a middle axle The application of the additional axle in an advanced (intermediate) position in relation to the engine axle can require shortening the rear overhang (see point 2.5) in order to divide the masses appropriately (see Figure 2.18). Figure 2.18 91540 1 Additional added axle 2 Reinforcement section 3 Connections 4 Shortening rear overhang (if necessary) 2.7.6 Steering axles Steering axles can be installed both intermediately and at the rear. They can be of the self-steering or force-steering types and be designed and installed in such a way that the required dependability and road safety are guaranteed.
The self-steering axle must be fitted with a device controlled from the driver’s seat which will lock the axle in the straight position when reversing. The installation of an axle whose force-steering is obtained by means of the original steering system of the vehicle requires specific authorisation from IVECO in relation to the suitability of the original components for the conversion in question. In this case, it will be necessary for diagrams of the supplementary system to be submitted for our inspection.
2.7.7 Components and suspension Manufacturing quality of all components used (axle, suspension, braking units, systems etc) must be ensured in order to guarantee driving safety and good vehicle operation. Particular care and attention must be paid to the designing and construction of the suspension in consideration of its importance for the proper performance and handling of the vehicle on the road. The designed suspension may be either of the mechanical leaf-spring type, pneumatic with air actuated springs or of a mixed type.
Whatever type is used it must not negatively affect the handling characteristics of the vehicle and its components in terms of driving quality, comfort, road holding, working angle of die transmission and its working space in the case of an intermediate supplementary axle. Where the additional axle has its own independent suspension, the suspension characteristics must be proportional to those of the original rear suspension in relation to the static loads applied to the two axles. Installing a supplementary axle Base - January 2008 Print 603.93.431