1980 Allis-chalmers 8550 4 Wheel Drive Articulating Tractor - Hour Meter Shows 2754, 3 Hydraulic Remote Controls, 3 Point Hitch, Big 1000 Pto, Powered By ALLIS CHALMERS 12.0l 6-cyl Diesel Which Is Rated At 300 Engine Hp, Partial Power Shift With 20 Forward And 4 Reverse Gears, Duals All The Way Around With 208-38 Tires. Year Of Machine Is Between 1977-1981, 1980 Is An Estimate Year Of Manufacture.