Characteristics: 4 fixed chassis models or 6 hydraulic folding chassis models including: a reinforced 100X80 chassis self-directional and floating coupling head equipped with rollers 50 mm shaft for 700 disc shaft 60 mm shaft for 900 disc bearings self-aligning bearings chains hydraulic folding scrapers in 3m00, 3m50, 4m00, 4m50, 5m00 and 6m00. Folding width 2m17 4 bearings with bearings for 3m00, 3m50 and 4m00 fixed frames 6 bearings with bearings for 3m00, 3m50 and 4m00 fixed frames