Posted by DR. EVIL on April 30, 2023 at 12:20:30 from (174.192.64.43):
In Reply to: I.H. H tractor posted by tom levandoski on April 29, 2023 at 07:39:49:
I worked at FARMALL in Rock Island for 4-5 years, in both production assembling front axles and in Purchasing also called Matetial Scheduling. We dealt with all but a few of IH's iron foundries, Louisville was the Big one, Memphis, Indianapolis, IH had a nice newer little ductile iron foundry in Waukesha, WI, and until about 1970 FARMALL itself poured lots and lots of castings. We really didn't buy castings from outside foundries, EXCEPT, the wide front axle castings on 86 & 88 series tractors was ductile iron, too big for Waukesha, had been done at Memphis until about 1979 when we got a semi-truck load of weird greenish colored castings, yep, from John Deere Silvis, Ill foundry about 8-9 miles due east of FARMALL, WE SAVED several hundred Dollars per truckload just on freight. Yes, castings move and relieve stress after machining, only 2-3 thousands of an inch, thermal treatment and vibratory treating of castings before machining is used to normalize the castings. Most stuff on tractors is small enough it doesn't matter. We had a quality team at a food & chemical equipment mfg company that made huge high pressure pump housings, 5 & 7 cylinders arranged like a John Deere A and the cylinders and heads were huge machines forged stainless steel bullets. The machine base moved a little, the head & cylinders didn't. We put a lot of time and expense into the project just to decide it didn't effect our machine. We had our own coordinate measuring machine, we could measure anything to.00001 inch repeatability, if it moved we would know.
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Today's Featured Article - The Perfect Restoration - by Chris Pratt. Often, in quiet moments, I have wandered back in my thouhts to the many tractors I have seen over the years and wondered which one inspired me the most. Sure, we have a fond attachment to one brand and model or another, sometimes it was remembering that first time we got to climb up in the drivers seat and command that roaring beast, or maybe because when you see that special model, you can't help but see Dad on it, he's gone, but everytime you see a tractor like his, it's a like part of him i
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