There are typically three types of hydraulic pump constructions found in mobile hydraulic applications. Included in these are gear, piston and vane; however, there are also clutch pumps, dump pumps and pumps for refuse vehicles such as for example dry valve pumps
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 certainly taken from 
what is called the prime mover (a turning power) like the power take-off or directly from the truck engine.
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 Hydraulic Pump china rotation. On the other hand, a bi-rotational pump has the capacity to operate in either direction.