Machine description: Used 1981 Allis Chalmers tractor, black belly, 2WD, cab/heat/AC, new AC pump, powershift, differential lock, 540/1000 PTO, 2 hydraulic remotes, 3rd arm, 3-point, LED lights, engine block heater, 11L-1... more info about the 1981 Allis Chalmers 7020.