There are typically three types of hydraulic pump constructions found in mobile hydraulic
applications. These include gear, piston, and vane; however, there are also clutch pumps, dump
pumps, and pumps for refuse vehicles such as dry valve pumps and Muncie Power Products.
The hydraulic pump is the component of the hydraulic system that takes mechanical energy and
converts it into fluid energy in the form of oil flow. This mechanical energy is taken from what is
called the prime mover (a turning force) such as the power take-off or directly from the truck
With each hydraulic pump, the pump will be of either a uni-rotational or bi-rotational design. As its
name implies, a uni-rotational pump is designed to operate in one direction of shaft rotation. On
the other hand, a bi-rotational pump has the ability to operate in either direction.
Types of Pumps :