A housing 21, a first motor 23 arranged a shaft 22 which is mounted to rotate about the shaft axis, a rotor 24 mounted for rotation with the shaft, the surface 29 and the member axis vane pump 20 comprising a member 28 having. Member, over the allowable range of motion, including components on both sides of the zero position, is movable relative to the shaft axis. The vane 32 is mounted to the movable within each rotor slot, and having arranged the distal end to engage the surface of the member. Vanes defining a plurality of chambers 33A~33F together with a rotator, and the surface. Individual volume of the chamber varies according to the relative position between the rotor and the surface. Second motor 31 is operatively arranged to selectively move with respect to the axial center line member for allowable range of motion. By member moves in one direction away from the zero position along the range of motion, fluid is permitted to flow in a first direction between the ports and the member is zero position along the range of motion by moving in the opposite direction so away, allowing the fluid to flow in opposite directions between the ports.