2-16 CHASSIS MODIFICATIONS E UROCARGO Euro 4/5 Operations for welding preparation As part of the procedure it will be necessary to remove the paint and deoxidise the parts of the chassis that are affected by the welding operation as well as those parts which may have to be covered by possible reinforcements. When work has been completed the modified part must be protected with adequate rustproofing (see point 2.2.2). a) Cut the side members with a diagonal or vertical cut.
(We recommend that the diagonal cut be used particularly for the section between the wheelbase) Cuts are not permitted in areas in which the profile of the side member as well as the chassis width change or in those where there is a high concentration of stresses (e.g. spring brackets). The cuts must not be made through the holes present in the side member (see Figure 2.4). Figure 2.4 NO NO YES YES 91446 b) On the inner side of the side member give the parts that are to be joined a V-shaped chamfer of 60 ° along the entire length to be welded (see Figure 2.5). c) Arc weld in stretches using carefully dried basic electrodes. The recommended electrodes are: For S 500 MC (FeE490:
QStE 500TM) Diameter of the electrode is 2.5 mm, current intensity approx. 90A (max. 40A for each millimetre of diameter of the electrode). Using MIG-MAG welding use a welding rod with the same characteristics as the material to be welded (diameter 1 to 1.2 mm). Recommended welding rod: DIN 8559 - SG3 M2 5243 gas DIN 32526-M21 or DIN EN 439 If FeE490 is used at very low temperatures, we recommend: PrEN 440 G7 AWS A 5.28 - ER 80S - Ni 1 gas DIN EN439-M21 Avoid current overloading. Welding must be free from marginal cuts and waste material. d) Repeat the operation on the reverse side by welding as detailed in point c). e) Allow the side members to cool slowly and uniformly.
Cooling by air, water or other means is not permitted. f) Remove excess material resulting from the welding operations by grinding. Drilling the chassis Base - January 2008 Print 603.93.431