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Haas: There is one little kink in your good directions. Many times these will not come loose without putting a wrench on the nut closest the block and in that slot. I've run across a few of these, whereby when one turned on fan shaft, the nut at other end turned with it until slack was taken up in slot. To force the wrench on fan shaft would only take corners off hex shaft. In that case I had to hold wrench on shaft, while I turned the nut in slot back the limit of slack in the grove. I would then have to repeat the process 3-4 times before it came loose. Two problems I've run across, some folks have used a smaller nut than IH originally used in the slot. Some folks have turned them anyhow damaging both nut and the groove. Of course a third problem, some of these belts have lasted so long, the rust factor is much worse than IH ever expected. I'm forgetting the exact sizes here, but the nut IH used when tractor was new was 1/16 larger on outside than standard nut for that size bolt. I have one piece of advice for Darrel, what ever you do, don't strip the corners off that hex shape on shaft. Put a wrench on the nut in groove on the engine block side. Even if you can only turn it 2" at the end of a 12" wrench handle. It will be slow, but will come eventually.
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