I try to avoid heating a metric shaft profile tube if at all possible. First line of attack is a good penetrant. I use 'combustion chamber cleaner'... that stuff will eat it's way through the dried grease and soften everything up. Apply it, tap the tubes with a hammer, apply more, etc. If it doesn't loosen, then hook onto the end of the shaft with a tractor or whatever is handy and tension it up. I use a chain to hook to the shaft. Once you draw it tight, then start pounding on the outer yolk. It will usually give up. This is assuming the shaft isn't just bent. If that's the case... either drive the pins out that retain it in the yolk or cut the welds where the tube is joined to the yolk. If you do that MARK where each profile is located on the yolk or at least have the presence of mind to correctly phase the shaft yolks before you weld the second one in place.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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