All States Ag Parts Water Pump Oliver Super 77 550 Super 55 770 Super 66 660 OC6 77 66 0080257-R Fits Oliver Tractor(s) Super 55, Super 66, Super 77, 66, 77, 550 (s/n 60501-72831), 660, 770 (s/n 60501-73638) Fits Oliver Construction & Industrial(s) OC6 Replaces Oliver OEM nos 162900AS, 0080257-R, 162900AS-R, 162900ASV, 180160C, 180160 Replaces Oliver Casting nos 0080257, 180060 Includes pump to backplate gasket