There are typically three types of hydraulic pump constructions within mobile hydraulic applications. These include equipment, piston and vane; nevertheless, additionally, there are clutch pumps, dump pumps and pumps for refuse automobiles such as dry valve pumps
The hydraulic pump is the element of the hydraulic system that takes mechanical energy and converts it into fluid energy in the type of oil flow. This mechanical energy is certainly taken from what is called the primary mover (a turning push) like the power take-off or directly from the pickup truck engine. 
With each hydraulic pump, the pump will be of the uni-rotational or Hydraulic Pump china 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 direction.