A radial piston pump is a form of hydraulic pump. This additive works to protect the hydraulic pump. There are also optional drives for an AC generator and a hydraulic pump. A PTU consists of a hydraulic motor paired with a hydraulic pump via a shaft. Typically though, the term "hydraulic actuator" refers to a device controlled by a hydraulic pump. Manual transmissions also lack the parasitic power consumption of the automatic transmission's hydraulic pump. A servo valve receives pressurized hydraulic fluid from a source, typically a hydraulic pump. A hydrostatic drive consists of a hydraulic pump and a hydraulic motor. Missile M-1's second stage lost thrust when the hydraulic pump failed. The hydraulic pressure is supplied by a high pressure radial piston hydraulic pump. The gearbox drove the fuel pump, its own lubrication pump, and the HPU hydraulic pump. It is possible to install a hydraulic pump at two side PTO locations. The one in the upper ran the upper through a hydraulic pump of its own. The engine turns the hydraulic pump capable of pressures up to . In the majority of cases, the PTO will connect directly to a hydraulic pump.