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 definitely taken from what’s called the prime mover (a turning power) such as the power take-off or straight from the vehicle engine.
With each hydraulic pump, the pump will be of the uni-rotational or bi-rotational design. As its name implies, a uni-rotational pump is made to operate in one direction of shaft rotation. However, a bi-rotational pump has the ability to operate in either direction.