On a monthly basis, the Assn. of Equipment Manufacturers compiles and publishes the unit sales for 4WD (4 wheel drive) tractors. AEM defines its 4WD category of tractors as “as a large frame machine with equal size wheels with the capability to dual/triple allwheels; equal and consistent power to all wheels; full time power to all wheels; engages primarily in heavy draft and drawbar applications normally considered to be related to farming; allwheel steer; and articulated or rigid frame.” Some large tractor manufacturers offer the general guideline for categorizing these tractors as those of about 300 horsepower and larger. These tables show the monthly sales of 4WD tractors from 2004-present based on AEM data.
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