Scandinavia type rear spades and non-skid are directly installed on the tilting frame or subframe, depending on the models of equipment. They are controlled separately by two independent distributors and two double-action hydraulic stabilizing jacks equipped with double non-return valves, which can be operated in both directions and guarantee the stability of the selected position. The two jacks control the positioning of the spades with anti-skid, notched bases. This system has been developped for use on snowy and sliding ground, and to enable efficient winching to be carried out.