insert 74 the motor drive shaft 72 is joined by coupling 76 to the pump drive shaft 78 of the pump element 80 the pump element has pump rotor vanes 82 having half the size in diameter of the motor rotor vanes 68 the pump rotor vanes 82 are mounted on a pump rotor base 84 having half the diameter of the motor rotor base 70 the larger inside space must be taken up by a thicker pump ring insert 86 to maintain a liquid volume which varies inversely or is approximately one half that of the liquid volume in the motor element 66 the liquid passes out from the motor element 66 through the fluid conduit 88 into the pump element 80 a pressure check valve 89 is located in the fluid conduit 88 before the fluid pump inlet to prevent a back up of the fluid flow the liquid from the pump element issues from the fluid outlet conduit 90 because of the increased pressure a bleed off conduit or by pass 92 is provided between the motor element 66 and the pump element 80 in the fluid conduit 88 for controlling excessive fluid pressure in the system thus a mechanical advantage is gained in the motor and pump system 64 provided by the larger rotor radius of the fluid motor element 66 compared to that of the fluid pump element 80 consequently the fluid output.