Allis Chalmers produced its HD21 farm tractor model From 1954 Until 1965 in United states with a Open operator station cabin. Talking dimensions and weight, this model weighs 45500 lbs or 20638 kg has , 198 inches [502 cm] of length and 99 inches [251 cm] of height. This tractor can fit ag tires of tracks front and tracks back . This Allis Chalmers HD21 is powerd by a diesel engine it has 844 ci or 13.8 L 6 cylinders ,it can produce 225 hp or 167.8 kW at 1800 (rpm), the fuel tank capacity is 135 gal or 511.0 L. This machine has crawler wheel drive system,2 forward and 1 reverse transmission system.
