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Re: IH Three Number Tractors
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Posted by Harold H on April 06, 1999 at 18:36:48:
In Reply to: IH Three Number Tractors posted by Bill on April 06, 1999 at 18:10:53:
Bill, I can't comment on the later tractors, but when IH went from the letters to the numbers there was reason. The first number series starting above the cub used higher even numbers as the horsepower got higher. All were four cylinders; 100, 200, 300, 400, and 600. The next serie were also all four cylinder so they just added a 30 to the lower horsepower models; 130, 230, 330 and 50 to the higher horsepower models; 350, 450, and 650. The next model series had both four and six cylinder models so the middle number designated four or six cylinder; 140, 240, 340, 460, 560, 660. For the next series the number of cylinders was the last number; 404, 504, 606, 706, 806, 1206. Then they went to another number in the middle with last number still repersenting number of cylinders; 444, 544, 656, 756, 856, 1256, then the 66 series then 86 series and so on. There were exceptions or odd ball numbers at times but basicly within each series as the number got higher so did the horsepower. Through the 56 series row crop tractors were generally Farmalls and utility or standard tractors were Internationals. However as normal there were exceptions and you could get row crop or high clear versions of several of the International utility models. Industrial models had a 2 in front of the non industrial model such as 2404, 2706, 2806, etc. Backhoe special models had a 3 in front of the number such as 3414 etc. This list is niether complete or infallable due to exceptions but I hope it gives you a better understanding of the IH numbering system. Harold H
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