3-38 BUILDING & MOUNTING THE STRUCTURES E UROCARGO Euro 4/5 Installation of tail lifts 3.8 Installation of tail lifts The dimensions of the longitudinal runners to be used when installing tail lifts can be assessed as follows: - By means of Table 3.13, with the standard rear overhangs and mean bending moments induced by tail lifts; as a function of their capacity. In the table, the minimum capacity values are specified above which suitable stabilisers must be used. - When cantilever tail lifts or with different lengths of the rear overhang and with special tail lifts (e.g.
aluminium), the flexural mo- ments induced on the chassis frame can be determined by means of Figure 3.26, whereas the characteristics of the longitudinal runners can be defined using the relevant figure. The bodybuilder or the Manufacturer of the tail lift must take care to ascertain safety and operational stability, in particular when applying Table 3.14.
In any event, particularly in those specific uses where there is not a suitable subframe (as in the case with box- type bodies built by means of cross members), the fixing for the tail lift must be provided by a structure that enables To provide the necessary strength and rigidity at the rear of the chassis, the connection between the chassis and the subframe must (especially in overhangs of over 1500 mm) be made using shear resisting plates. These must be fitted in the area of the overhang and of the rear suspension and spaced not more than 700 mm from one another as shown in Figure 3.26. Procedure for calculating the frame bending moment during loading of a tail lift.
Figure 3.26 Tail lift capacity lift to Rear axle (s) centreline 91538 W TL = Weight of tail lift. W L = Tail lift capacity The bending moment of the frame can be calculated using the following formula: For tail lifts without stabilisers M [Nm] = W L x A + W TL x B For tail lifts with stabilisers M [Nm] = W L x C + W TL x D C, D, W TL , W L : According to tail lift manufacturer’s data. NOTE Installation of tail lifts Base - January 2008 Print 603.93.431 Stabilizers Combined section olution see Figure 3.4)