3-14 BUILDING & MOUNTING THE STRUCTURES E UROCARGO Euro 4/5 3.3.4 Connection with greater elasticity When the connection needs to have greater elasticity (e.g. vehicles with a highly rigid body such as vans, tankers, etc., used on winding roads or under harsh conditions, special use vehicles, off road, etc.) fasteners of the type shown in Figure 3.11 must be used in the front area behind the driver’s cab. When there are bodies that generate high bending and twisting moments (e.g., crane behind cab), the subframe must be appropriate- ly sized to withstand them.
The characteristics of the flexible element must be suited to the rigidity of the body, the wheelbase and the type of use of the vehicle (uneven conditions of the road). With the aid of rubber plugs, use material that assures good characteristics of elasticity over time; make provision for suitable instruc- tions for periodical checks and restoring the torque setting when necessary. If necessary, the overall capacity of the connection can be restored by applying shearresistant fastenersin thezone ofthe rearsuspen- sion. On versions where there is vehicle lifting with the hydraulic stabilizers (e.g.
crane, overhead platforms), limit the yield of the flexible element (30 to 40 mm) to ensure sufficient cooperation of the subframe and prevent excessive bending moments on the original chassis frame. Figure 3.10 1. Element Figure 3.11 1. Element Connections between frame and counterframe Base - January 2008 Print 603.93.431