I don't know anything about break in oil. But with that said my cousin has been a john deere mechanic for about 45 years (now retired). He still works on tractors at his home. He just finished rebuilding a john deere 4000 engine. Uses regular oil. Starts engine lets it get up to temp. Stops engine. Checks adjustment on valves, re-torques head bolts, drains oil, checks main and rod bolts, puts new oil in, then said go pick some corn.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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