3-36 BUILDING & MOUNTING THE STRUCTURES E UROCARGO Euro 4/5 3.7.2 Crane on rear overhang It is advisable for this type of application, to extend the subframe over the entire length of the vehicle that is available for the body up to the back of the cab or if this is no possible the rear support of the front spring. The dimensions of the runners to be used are given in Table 3.12.
In consideration of the particular distribution of the load on the vehicle, where the load is concentrated on the rear overhang, in order to ensure the rigidity that is necessary for good performance on the road and when the crane is in operation, the subframe must be strengthened and stiffened in relation to the capacity of the crane. Box-type sections (see point 3.2) and brackets are to be used in the area of the rear suspension and the rear overhang (Length Lu see Figure 3.25). Care must also be taken to ensure that the transition from box-type to open section is well blended as illustrated in Figure 3.4 and Figure 3.5.
In the area that is affected by the box-type section, the frame must be secured to the chassis of the vehicle by means of shear-resistant plates (i.e. an adequate number of plates spaced at most 700 mm from each other), whereas elastic mountings are to be used in the front part. Due care must be taken to ensure that under any load conditions, the ratio of the weight on the front axle to the rear axle or axles, respects the limits set for the vehicle (see point 1.13.3). As the required stiffness of the subframe depends on various factors (i.e. crane capacity, size of its supporting base, vehicle kerb weight, chassis overhang) we cannot give information valid for all possible conditions.
For this reason the bodybuilder will have to assess the vehicle stability also by means of practical tests. If, as a consequence of such tests , the subframe stiffness proves insufficient, the bodybuilder will have to achieve this objective by means of alternative methods. The rear overhang of the crane (Length Lu, see Figure 3.25) must be limited as much as possible in order to preserve the good driving characteristics of the vehicle and acceptable stress conditions. This value must not exceed 50% of the wheelbase.
In the case of vehicles with a lifting rear axle, the verification of the minimum load on the front axle must be done with the rear axle in the raised position in those countries which permit driving under those conditions (see point 1.13.3). If the minimum pre- scribed value is not reached, the vehicle must be allowed to drive only with the axle in the lowered position. Table 3.11 - Crane fitted on on the rear overhang (subframe fastening with shear-resistant plates) A = The prescribed reinforcement section for the relevant body is enough (e.g. tab. 3.1 for normal box-bodies). Close the reinforcement structural element in the crane assembling zone.
Strengthen the reinforcement sections less than 5mm thick in the zone of the crane. E = To be checked on a case by case basis. Send the technical documentation with the checks on the stresses and stability to the relevant IVECO bodies. *) = On the ML version, use a section with modulus of resistance W x no less than 57 cm 3 .
Installing a crane Base - January 2008 Print 603.93.431 ) Total torque MG max (kNm) Model A x B x t (mm) (N/mm2 0,2 subframe 0/20 20/30 30/40 40/50 50/60 60/70 70/80 80/90 90/100 100/120 120/140 140/160 160/180 180/200 200/220 220/240 240/260 260/280 280/300 R Minimum value of strength modulus of subframe section Wx (cm3) ML60, ML65, 172 ,5x65x4 240 A A A 23 42 57 110 110 135 E ML75, ML80EL 360 A A A 23 32 57 110 110 135 E ML60, ML65, 172 ,5x65x5 240 A A A 23 32 42 71 110 110 E ML75, ML80EL 360 A A A A 23 32 57 71 110 E ML80, ML90, ML100 195 ,5x65x4 240 A A A A 32 42 71 110 110 E 360 A A A A 23 42 71 110 110 E ML80, ML90, ML100 195 ,5x65x5 240 A A A A 23 42 42 71 110 135 E ML110EL*), ML120EL*) 360 A A A A A 23 32 57 71 110 E ML110EL*), ML120EL*) 195 ,5x65x6 240 A A A A 32 57 71 110 110 173 E 360 A A A A A 32 42 57 71 110 135 E ML120, ML130, 240x70x5 240 A A A A A A 23 42 42 71 110 E ML150, ML100EW 360 A A A A A A A A 23 71 110 E ML120, ML130, ML150, ML140EW 240x70x6 240 A A A A A A A 32 42 71 110 135 E 360 A A A A A A A A 23 42 71 110 135 E ML120, ML130, 240x70x6 ,7 240 A A A A A A A 23 42 57 110 135 E ML150 360 A A A A A A A A 23 32 57 71 110 135 ML150 240x70x7 ,7 240 A A A A A A A 23 42 71 110 135 173 E 360 A A A A A A A A 23 32 57 57 110 135 173 E ML180 262 ,5x80x6 240 A A A A A A 23 42 42 110 110 173 222 222 E 360 A A A A A A 23 23 23 42 71 110 173 222 246 246 E ML180 262 ,5x80x6 ,7 240 A A A A A A A 32 42 71 110 135 222 222 E 360 A A A A A A A 23 23 42 57 110 135 173 222 246 E ML180 262 ,5x80x7 ,7 240 A A A A A A A A 42 71 110 135 173 222 246 E 360 A A A A A A A A 23 32 42 71 110 135 173 222 222 246 E