1. oem replacement ; 2.A4VSO40,A4VSO71,A4VSO125,A4VSO180,A4VSO250, ... piston variable pump, which is specially designed for the high efficiency hydraulic drive with open loop.1.Wildly applied ... control 6.The special designed long life and the high precision aviation roller bearing7.Lower noise, long life, better ... , 250, 355, 370 is ready at any time. OEM replacement A4VSO250 viarable piston pump