I wonder what the S/N is on that. It has to be in the 40's or 50's and has to be either a 6 or an 8. Reason for saying so is it's a 6 cylinder and back then a D-4 and D-7 were 4 cylinders with the D-6 and D-8 being just an extra 2 cylinders of the smaller model. So a D-6 had the same sleeve and piston as the D-4 just 2 more of them. The Caterpillar Diesel got dropped off from them about then too. If it was a 30's or early 40's ti could have spoked front idler unless it was changed with a later style. Sprocket would have been also. By the late 40's or 50's they had the sprocket teeth so they could be unbolted and replaced that way. I'm no expert on them just accumulated this information from what I have seen on them over the years and some of it may even be off.
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Today's Featured Article - Machine Shops - by Curtis Von Fange. It is a story that repeats itself countless times. In the process of rebuilding a particular section of the tractor there is a broken part for which a replacement cannot be found. The parts houses find in their catalogue that it is unavailable. The dealerships call it a discontinued part. Salvage yards define it as hard to find or, even worse, rare. Everyone on the NET says, 'what is it?' But don�t despair there is another avenue that can be used to get that piece repaired. The local mach
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