A hydraulic pump is a mechanical source of power that converts mechanical power into hydraulic energy (hydrostatic energy i.e. flow, pressure). Hydraulic pumps are used in hydraulic drive systems and can be hydrostatic or hydrodynamic.

Hydraulic pump are include hydraulic vane pump , gear pump, Bent axis pumps,Inline axial piston pumps,Radial piston pumps.

Hydraulic pumps are used on every conceivable mobile or industrial hydraulic machine. Hydraulic pumps are used on excavators, cranes, loaders, tractors, vacuum trucks, forestry equipment, graders, dump trucks, mining machinery, etc. Mobile applications use hydraulic pumps more prolifically than do industrial machines, because electric actuators are generally not used for mobile machinery.