Hydraulic motors make use of fluids to convert hydraulic energy into mechanical energy in order to generate torque and rotation. The power generated by hydraulic motor depends on the flow of fluids and the pressure drop of the motor whereas; the torque generated by the hydraulic motor depends on the displacement and pressure drop. The hydraulic energy generated in hydraulic motors is converted into mechanical energy using a rotating shaft. The rotating shaft can be connected to the power drive to operate various machineries. Hydraulic motors have found numerous applications including winches, self-driven cranes, crane drives, mixer and agitator drives, excavators and roll mills. Hydraulic motors are categorized into three segments including hydraulic gear motors, hydraulic vane motors and hydraulic piston motors. Hydraulic gear motors are of two types namely, gear motors which are used for high speed operations and epicyclic gear motors which are used for slow speed operations. Hydraulic gear motors are widely used in agricultural machinery to drive dispersion plates, conveyor belts, fans and screw conveyors. Hydraulic vane motors experience less internal leakage as compared to gear motors and are preferred for low speed operations. Hydraulic vane motors are widely used in industrial applications including injection molding and screw-drives. These motors can also be used for other mobile applications including agricultural machinery. Hydraulic piston motors are used in various heavy-duty high speed operations where significant amount of power is required. Hydraulic piston motors have found immense applications in construction equipment and drive mobiles, ship-cranes, winches and other heavy duty hydraulic equipment for onshore and offshore operations. Other industries which make use of hydraulic motors include aerospace, mining, oil and gas industries.