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Related to hydraulic pump: centrifugal pump, Hydraulic motor
hydraulic pump[hi′drȯ·lik ′pəmp]
A component unit in the hydraulic system of a construction machine; the prime mover that forces fluid to flow through the system.
A pump in a hydraulic-pressure system, used to build up the requisite pressure for the system. The main hydraulic pumps are normally engine-driven, whereas those for use in a secondary hydraulic system or in an emergency may be mechanically or electrically driven. The hydraulic pump in such an eventuality may also be hand operated. See hydraulic system.