2-22 CHASSIS MODIFICATIONS E UROCARGO Euro 4/5 Modifying the rear overhang 2.5 Modifying the rear overhang 2.5.1 General specifications In modifying the rear overhang it must be borne in mind that such modification entails changes in the distribution of the payload on the axles relative to the loads established by IVECO (see point 1.13). The limitations established by national laws must also be respected as well as the maximum distance from the rear edge of the body and the ground clearance prescribed for the tow hook and the underrun bar. The distance from the extremity of the chassis to the rear edge of the body must not, as a general rule, exceed 350 to 400 mm.
Should the bolted rear cross member be re-positioned, the same standard type of connections should be maintained (i.e. number of screws, dimensions, class of resistance). When re-positioning rear cross members fastened by rivets, these can be replaced by flanged nuts and bolts with same diameter or by class 8.8 hexagonal-headed screws with the next largest diameter. Use self-locking nuts (do not use bolts with a diameter larger than M14). When the installation of a tow hook is planned an adequate distance (approximately 350 mm) must be left from the rear cross member to the next nearest cross member for mounting and removing the tow hook wherever necessary.
If the modifications are carried out competently and in compliance with the specifications contained in this manual, the towable weight originally established may be retained. In any case responsibility for the work rests with those who have carried it out. Authorisation Authorisation from IVECO is not required, if the frame is extended at the rear, or is shortened to the minimum value admissible for each model as standard, provided that this is done according to the instructions given in this manual. For special preparations (e.g.
shop or workshop vans) where distribution of the load is pre-established and controlled, it is also possi- bile to reach wheelbase values > 60% provided the conditions described in par. 1.13.3 are respected. If it proves necessary to reposition the RFC (Rear Frame Computer) on the frame and/or modify the length of the electrical circuits, see Chapter 5 “Special instructions for electronic subsystems”. ! 2.5.2 Reducing the overhang If the rear overhang of the chassis has to be reshortened, the last cross member must be moved forward.
If, when reducing the overhang, the rear cross member is found to be too close to an existing cross member, the latter must be removed if it does not affect the suspension supports. 2.5.3 Increasing the overhang Various methods of increasing the length are given in Figures 2 .7 and 2.8. The frame may be straight cut. The minimum dimensions of the reinforcements the are to be fitted to the modified section are given in Figure 2.3. Figure 2.7 shows a typical method of extension for increases of 300 to 350 mm. In this case the reinforcing L-bars, which also serve to connect the cross member and the chassis frame, must be of the same thickness and width as the original gusset plate.
The connec- tion of the cross member and the plates, originally achieved with rivets, may be made with class 8.8 bolts with thenext largerdiameter. Modifying the rear overhang Base - January 2008 Print 603.93.431