Allis Chalmers produced its HD7W farm tractor model From 1940 Until 1950 in United states and more than 1,803 units were build. Talking dimensions and weight, this model weighs 14,000 lbs or 6350 kg has 81 inches [205 cm] of width, 128 inches [325 cm] of length and 69 inches [175 cm] of height. This tractor can fit ag tires of tracks front and tracks back . This Allis Chalmers HD7W is powerd by a diesel engine it has 213 ci or 3.5 L 3 cylinders the fuel tank capacity is 31 gal or 117.3 L. This machine has crawler wheel drive system,4 forward and 1 reverse transmission system.