There are typically three types of hydraulic pump constructions found in mobile hydraulic applications. Included in these are gear, piston and vane; nevertheless, there are also clutch pumps, dump pumps and pumps 
for refuse automobiles 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 type of oil flow. This mechanical energy is certainly taken from Hydraulic Pump china what’s called the prime mover (a turning power) such as 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 made to operate in one path of shaft rotation. On the other hand, a bi-rotational pump has the ability to operate in either direction.
