2011 John Deere 7750 ProDrive 4WD Self-Propelled Forage Harvester, 13.5L John Deere Diesel Engine, ProDrive 2 Speed Transmission, Advanced Header Control, AutoLube, Straight Front Roll With Replaceable Teeth, Hard Faced Machine, Hard Faced Knife Bracket, 40 Knife Cutter Head, Heavy Duty Straight Grass Processor, AutoTrac With RowTrac, High Wear Chute, Long Spout Extension, Weight Carrier With Weights, 23.1-26 Rear Tires, 800/65R32 Front Tires, SN: 1Z07750YCB0511677