Abstract: A vaned hydraulic motor which includes a rotor adapted to rotate in excess of 180.degree. with respect to the stator, has, in an axial juxtaposition, a middle circumference annular chamber and two outer circumferential annular chambers flanking the middle annular chamber. The axial width dimension of each of the outer annular chambers is one half of the axial width dimension of the middle annular chamber. In each annular chamber there are disposed first and second radial partitions forming a separate partition pair for subdividing each annular chamber into two pressure chambers. The first partition of each pair is affixed to the stator and the second partition of each pair is affixed to the rotor. Further, the second partition in the middle annular chamber is offset 180.degree. with respect to the second partition in each outer annular chamber.