• The swash plate is designed with an axial piston variable pump for closed circuit hydrostatic transmission. • When the swash plate passes the neutral position, the flow direction of the hydraulic oil will change smoothly. • Two pressure relief valves are installed on the high pressure side to prevent overload. • The built-in charge pump acts as charge pump and control. • The maximum charge pressure is limited by the built-in low pressure relief valve. • Brand new slewing components and bearings, the transmission efficiency is improved, and the input speed increased. • The HP4VG175-280 pump adopts an integrated design at the rear of the housing to reduce leaking points.. • Optimized shell design to reduce vibration and noise. • Electric proportional displacement control to meet the application requirements of multiple industries. • Various oil outlet connection methods help to optimize pipeline connection. • HP4VG pump can be optionally equipped with a flush valve, which can be directly installed on the pump body.