A hydraulic pump is a mechanical device that converts mechanical energy into hydraulic energy by moving fluid through a system. It plays a crucial role in hydraulic systems, which are used in various applications, such as construction machinery, automotive systems, and industrial equipment. The pump generates flow and pressure, allowing hydraulic fluid to power different components. There are several types of hydraulic pumps, including gear pumps, piston pumps, and vane pumps. Each type operates differently but serves the same purpose of delivering hydraulic fluid to perform work. Proper maintenance of hydraulic pumps is essential for ensuring efficiency and longevity in their applications.