There are usually three types of hydraulic pump constructions within mobile hydraulic applications. Included in these are gear, piston and vane; nevertheless, there are also clutch pumps, dump pumps and pumps for refuse vehicles such as dry valve pumps

The hydraulic pump may be the element of the hydraulic system that takes mechanical energy and converts it into fluid energy in the kind of oil flow. This mechanical energy is usually taken from what is called the prime mover (a turning power) like the power take-off or directly from the pickup truck engine.

With each hydraulic pump, the pump will be of the Hydraulic Pump china uni-rotational or bi-rotational design. As its name implies, a uni-rotational pump is designed to operate in one path of shaft rotation. On the other hand, a bi-rotational pump has the ability to operate in either path.