Sauer MF hydraulic axial piston motor: MF20, MF21, MF22, MF23, MF24. are of swash plate construction with preset displacement. and are intendent for closed circuit operation. The output speed is propor tional to the flow rate of the input fluid. The output torque is proportional to the differential between high and low pressure sides of the fluid circuit. The direction of motor (output) shaft rotation depends upon which port the fluid enters the motor.