Below is a list of Hydraulic Gear Motor manufacturers from Maryland Heights, Missouri. A hydraulic gear motor converts hydraulic pressure into force that is able to generate a large amount of power. Hydraulic motors use moving fluids to create vacuum suction, creating enough power for several different functions at the same time; a single pump can power several different motors. Hydraulic motors are able to produce much more power than electric motors of the same size and for this reason are used for larger loads.