Abstract: In a crawler-type track, an endless flexible belt is stretched over a stator which includes fluid-receiving pressure-tight cells and is formed with a central fluid collecting tank connected to a revolving pump. The cells of the stator are supplied with pressure fluid via the channels or passages formed in the stator. The belt is radially spaced from the stator so that a gap, formed therebetween, is filled with pressure fluid. The belt is provided with an inner slide layer also formed with fluid-receiving cells. The fluid-containing system is enclosed in a pressure-tight circuit.