David Brown produced its 850 farm tractor model From 1960 Until 1965 in United states with a Open operator station cabin. Talking dimensions and weight, this model weighs 3750 lbs or 1701 kg has , 113.5 inches [288 cm] of length while maintaining a wheelbase of 75.25 inches [191 cm] the front tread is about 52/56/60/64/68/72 inches while the rear tread is 52/56/60/64/68/72 inches . This tractor can fit ag tires of 5.00-15 front and 5.00-15 back . This David Brown 850 is powerd by a diesel engine it has 154 ci or 2.5 L 4 cylinders ,it can produce 35 hp or 26.1 kW at 2000 (rpm), the fuel tank capacity is 10.6 gal or 40.1 L. This machine has 4x2 2WD wheel drive system,6 forward and 2 reverse transmission system.