Drop in replacement for Ross ME180103AAAA hydraulic motor. Low speed, high torque. 21.05 cubic inch displacement. 6 bolt magneto flange mount. 1-1/4" shaft with woodruff key. 7/8"-14 SAE ports. 220 RPM maximum speed. 8009 inch lbs. of torque. 19.81 GPM maximum flow rate. 2973 PSI maximum pressure differential. Clockwise rotation.