This water pump is completely new, from the seal to the housing.It comes with all the mountinggaskets and a fitting kit and includes the backplate.This pump fits multiple John Deere Tractor models.(NOTE: replaces AR45332-R, R26337, R27547, R34977, R34982, R41315, R41318, R44122,SE500919) Pump comes w/ all mounting gaskets & fitting kit.Casting # R34982, R34977, R41315, R41318, R44122, R26337, R27547 Compatible with models: John Deere TRACTOR: 3010 (DIESEL ENG. / LESS AIR COND.), John Deere TRACTOR: 3020 (DIESEL ENG. / LESS AIR COND.), John Deere TRACTOR: 4000 (DIESEL ENG. / LESS AIR COND.), John Deere TRACTOR: 4010 (DIESEL ENG. / LESS AIR COND.), John Deere TRACTOR: 4020 (DIESEL ENG. / LESS AIR COND.)