A hydraulic power unit, also known as a hydraulic pump station, is an independent hydraulic assembly. It supplies oil according to the requirements of the main unit and controls the direction, pressure, and flow of the oil, used in various hydraulic machines where the main unit and the hydraulic assembly can be separated. After purchase, the user simply connects the hydraulic power unit to the actuator (cylinder or motor) on the main unit using oil pipes, and the hydraulic machine can perform various specified actions and work cycles. The hydraulic power unit is composed of a pump assembly, an integrated block or valve combination, an oil tank, and an electrical box assembly.