Ford tractors can be identified by the serial number that has either been stamped behind the oil filter on the engine block's left side, on the left side of the transmission case, or behind the starter, depending on the tractor's model. If the serial number is hard to read due to wear or if the original engine has been replaced with one from another model, the tractor can be identified by characteristics that are unique to its model number.
N series tractors have a distinctive wheel bolt pattern that differentiates between 9N, 2N, and 8N models. 9N and 2 N tractors manufactured before 1944 have a beam radius rod, while 2N and 8 N models built from 1944 to 1952 are oval. 9N and 2N models built from 1940 to 1947 have a regular dashboard; 8Ns produced from 1950 to 1952 have a proofmeter on the dash. 9N and 2N models have three-speed transmissions, as opposed to the 8Ns four-speed. 8N models build from 1939 to 1950 featured a front mount distributor, and models built from 1950 to 1952 had a side mount distributor.
Ford's NAA series was taller than previous models. These tractors featured a red emblem in the center of hood. The 1953 models said, "Golden Jubilee Model" around the rim, and 1954 models replaced the lettering with small crosses.
The Hundred series tractors are easily identified by locating the hood emblem, on which the series number is emblazoned. The front end was also wider in models intended for row cropping.