DB Electrical AMO0037 New Alternator For John Deere Tractor, 4000 4020 4320 4520 4620, Cotton Picker 484 499 699 7440 9910, Jd Combine 105 3300 4400 4420 AH105520 AH80093 AH80094 7376 AR50909 AR52077 100% New aftermarket unit built to meet OEM specifications 1-year warranty protects you after your purchase Factory direct pricing with no middleman markup delivers exceptional value