Iveco DAILY 4x4, Instructions Manual, Page: 45 / 110

CHASSIS MODIFICATIONS
2-21
D
AILY
4x4
Print 603.93.761 Base - May 2007
Modifying the Rear Overhang
Towed vehicle equipped with a towing device that cannot move in a vertical direction (in relation to the trailer) and in which
the axle or axles are arranged about the vehicle centre of gravity (under uniform load) so that only a small vertical load no greater
than 10% of the maximum trailer load or than 1000 kg, if lower, is transmitted to the vehicle (lower value applies).
Mid-axled trailers are therefore subgroups of trailers with rigid drawbars.
116774
Figure 2.5
Length of trailer work surface and theoretical length of crossbar
The use of trailers with centre axles (rigid tow bar trailers with single or tandem axles), with respect to articulated tow bar trailers,
entails an increase in bending stress on the rear chassis overhang as well as an increased torsional stress of the rear towing cross
member resulting from the vertical static and dynamic loads which the tow bar exerts on the hook (for example when braking or
on bumpy roads).
On vehicles for which towing of a trailer is permitted and in accordance with values laid down by IVECO for each model, towable
weights with mid-axled trailers and vertical loads on the drawbar may be defined on the basis of the size of the drilling flange present
on the vehicle rear beam (see Table 2.11).
With long rear overhangs, it may be necessary to adopt larger subframe sections than normal depending on the towable weights.
Table 2.11 - Approved towing hooks available
Maker Type Class D (kN) D
c
(kN) V (kN) EC approval no.
Pommier 70-C/3 S 31 31 37.5 e 2*94/20*0062*00
The following table shows S maximum admitted value for original towing cross member when towing a central axle trailer.
Model Maximum S (kN)
35S18W - 55S18W 100