CHASSIS MODIFICATIONS 2-41 E URO C ARGO E URO 4 - 5 2) Mounting a box section of suitable dimensions underneath the cross member, anchored at the extremities to the vertical web of the side members and joined at the centre of the cross member as shown in Figure 2.18. In vehicles having a short rear overhang and a subframe, the box section can be fitted within the subframe sections, above the cross-member, and connected to it by means of a plate (as shown in Figure 2.14). Should box-section assembly require modification to underrun bar plates the original requirements for fastening, resistance and stiffness must be met (comply with local government regulations if any).
Figure 2.18 1) Original cross member 2) Box section 3) Gusset plate 4) Connecting plate 1 Original cross member 2 Box section 3 Gusset plate 4 Connecting plate 91460 2.10.5.3 Tow hooks for Central Axle Trailers The use of central axle trailers implies the use of tow hooks suitable for this purpose. The values of the trailer loads and of the permissible vertical loads are contained in the technical documentation of the manufacturer of the tow hook or on the production data plate There are also tow hooks with special type approval, whose values are greater than the ones mentioned in the above standards.
These hooks may in any case be subjected to restrictions depending on the trailers used (e.g. drawbar length). In addition this can imply that the rear cross member should be further reinforced and a subframe runner of larger size be fitted. Remarks about the Payload It should be ascertained that the static drawbar load does not cause the allowable load on the rear axle or axles to be exceeded and that the required minimum load acting on the front axle is adhered to (see 3.2.3). Installing a Towing Device Print 603.93.431 Base - July 2006 Revi - June 2007