BUILDING & MOUNTING THE STRUCTURES 3-17 E UROCARGO Euro 4/5 When a body cause high bending moments on the frame and the relevant strength has to be increased by means of shear resistant plates between the frame and subframe, or the subframe height has to be limited as far as possible (e.g. towing of central axle trailers, crane on rear overhang, tail lifts), observe the following instructions: Table 3.3 Table applies to all models. NOTE 1) The number of bolts per plate enables a proportional increase in the distance between the plates (a double number of bolts enables greater distance between the plates). In the bearing areas of the frame (e.g.
supports of the rear spring, of the tandem axle spring and of the rear air springs) closer spaced plates will have to be considered. 2) In case of limited thickness of both of the plates and the subframe, the connection should be carried out by means of spacers, so that longer bolts can be used. Figure 3.14 3.3.7 Mixed connection On the basis of instructions given for the construction of the subframe (point 3.1) and considerations included in the general section, the mounting between the vehicle frame and subframe can be of the mixed type, i.e.
it may be obtained through a rational use of elastic (springs), flexible connections (brackets, clamps) and rigid connections (plates for longitudinal and transversal anchorage). As a guide it is advisable to have coli springsconnections on the front section of the subframe (at least two on each side) while plate connections are recommended for the rear section of the vehicle when a stiffer structure is required for the whole assembly. Connections between frame and counterframe Print 603.93.431 Base - January 2008 Frame/subframe Max. distance between Min.
characteristics of the plates section height ratio the centreline of the shearing resistant plates 1) Thickness (mm) Fixing hardware dimensions (at least 3 screws each plate) 2) ≤1.0 500 8 M 14