FLUIDIC CIRCUIT FOR A HYDROSTATIC TRANSMISSION

The high pressure conduit and the low pressure conduit of a hydrostatic transmission are connected by a flushing control valve provided with a discharge outlet into a low pressure area, and by a pressure limiting valve which permits at increased pressure in the high pressure conduit, fluid to flow therethrough so that the fluid flowing ouf of the pressure limiting valve is divided into a first flow part which is discharged by the control valve, and a second flow part entering the low pressure conduit at a point spaced from the point at which a priming pump discharges into the low pressure conduit. In this manner, only part of the hot fluid flows into the pump of the hydrostatic transmission while an other part of the fluid is discharged into a discharge area, and displaced in the low pressure conduit means by cool fluid from the priming pump.