The main problem was the bearings used in the final drives.
Originally they were the same ball bearings as used in the M, and simply weren't strong enough.
The 560 had nearly twice the HP as the original M, but the rear end was not updated for the extra HP. Same deal for the 460/H relationship.
IH updated all the tractors with roller bearings, and any new ones came with the roller bearings from the factory. After that everything was fine.
This begs the question: If someone were to find an original 460 or 560 that hadn't been updated, should it be updated? Such a tractor would be a RARE original, with low hours.
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
... [Read Article]
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