There are of course exceptions to this and the exact location of the tractors serial number tag is always shown the in the tractors operators manual. IH started using this location for the serial number plate in the late 1930s and continued it until the mid-1970s. A very common placement of the tag was on the clutch housing of the transmission.
#International serial number decoder free
IH affixed the tag to a location on the machine that would be free from normal wear or damage from an attachment. IH did this to ensure that the tag would last for the expected lifetime of the machine. Typically the serial number tags were made of a rustproof non-corroding metal like aluminum or anodized steel. This was especially helpful to the dealer when looking up service parts to know exactly what parts may be needed for a repair. If changes or improvements were made to a machine, the use of a serial number would allow IH to note the change in the production run. International Harvester (IH) added serial number tags to their tractors starting in the 1920s to help identify the model it was and the number of its production. As time moved forward, corrosion and wear would often erase this marking. Some manufacturers chose to simply stamp or engrave the main frame or any other major chassis part with a production number or code. Read more of Kenneth Updike’s infinite IH wisdom in Red Tractors, Red Combines, and Red 4WD Tractors.Īs tractor manufactures grew their production volume, they needed a method to identify the various models they were building. In this original article, Red Power and Heritage Iron journalist Kenneth Updike details the ins and outs of International Harvester tractor serial number plates, from their origins in the 1920s as a replacement for frame and chassis stamps and engravings, to their enduring value as the most reliable identification of a rare machine.
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