This is a brand new aftermarket John Deere tractor alternator. This fits models 1010, 1040, 1140, 1550, 1640, 1750, 1850, 2010, 2040, 2040S, 210C, 2140, 2250, 2650, 2650N, 2850, 300D, 3040, 3050, 3055, 310D, 310E, 3140, 315C, 315D, 3350, 3430, 344E, 3640, 3640S, 3830, 400G, 410C, 410D, 410E, 444E, 450G, 455G, 482C, 510C, 510D, 540E, 540G, 544E, 544G, 548E, 550G, 555G, 6100, 624E, 624G, 640E, 643D, 644E, 644ER, 644G, 648E, 6500, 650G, 6600, 6610, 710B, 710C, 710D, 740, 740E, 748E, 840, 940 . Thi