After 81 years of machinery/salvage sales we're cleaning up/scrapping all of our old parts. Found this wrench and thought you guys would be interested in seeing it before it goes in the roll off. On our last box car and I don't have any more Ford parts so no need in asking.
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On an N series tractor you stick the small end down in the gas tank and it will tell you how many gallons are in the tank.
 
Good morning, Allen: I have seen pics of similar wrenches some time ago. The wrench is basically what it looks like, an ordinary open end wrench. The markings are in inches from one end, and are to measure something, possibly plowing depth? (I am not a farmer, my tractors are only for cutting grass). 50 or 75 years ago, many people did not have a convenient ruler/measure to carry while doing field work.

Dennis M. in W. Tenn.
 
9N17014 is the Ford Plow Wrench. IT IS NOT, NOR HAS EVER BEEN ID'd AS "A GAS GAUGE WRENCH" by FORD, only by farmers using it as one. Clanging metal to metal with a gasoline mix??? Like giving a monkey a hand grenade. The wrench was developed by Harry Ferguson first on the 1936 Ferguson-Brown Type A tractor as Harry wanted only two bolt sizes used on the tractor and plow. When Ford hired him for the 9N, then the wrench took on the Ford logo, 9N prefix and part number. Ford nomenclature used the "17xxx" basic part UPC code for the tools. It had multiple uses but the sizes 11/16" and 1-1/16" weren't the only bolt sizes on the Ford tractor and plow. Intended as the all-purpose plow wrench, most all bolts are those sizes and the inch markings were so the farmer could measure plow furrow depth and width. The inch hash markings weren't a Ferguson idea. He stole it from the earlier LaCrosse Plow Wrench. When Ford fired Ferguson and he went to build his own tractor -the TE20 and TO20 Tractor, he took the wrench idea only now it carried the Ferguson "TO" trademark but retained the basic part number, 17014. Many of Ferguson's parts carried over the Ford part numbers excluding the Ford and 9N prefixes as harry stole a set of Ford 9N prints as to which he built his tractors on. Many variations were made then by different suppliers but they all had the identical shape, size and obligatory inch markings. I wrote articles on this in the N-News, Ford Tool Times, and Ford/Fordson Journal.

Tim Daley(MI)
 

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