Hydraulic power is the power transmitted by the controlled circulation of pressurized fluid, usually a water-soluble oil or water–glycol mixture, to a motor that converts it into a mechanical output capable of doing work on a load. Hydraulic power systems have greater flexibility than mechanical and electrical systems and are extensively used in modern aircraft, automobiles, heavy industrial machinery, and many kinds of machine tools
. A hydraulic power unit, also known as a hydraulic power pack, is a self- contained system that includes a motor, a fluid reservoir, and a pump, working to apply the hydraulic pressure needed to drive motors, cylinders, and other complementary parts of a given hydraulic system
. This power is generated through a combination of oil flow and pressure, created from a hydraulic pump and transmitted through hoses or tubes, via control valves, to the hydraulic motor or cylinder that will do the work
