The pistons are lubricated from the throw off of the connecting rods. That is one reason you never want to let an engine sit at low idle speed for extended periods of time. The lower rpms do a poor job of lubeing the pistons. Many people will argue this but that is beside the point. The ones that argue will be about the richer fuel mix at idle and there is merit in that but fuel injected engines rule that argument out. I learned early on in engine rebuild school that just the wrong radi on a crankshaft crank pin can effect the throw off of oil and lead to oil consumption. Far as the wrist pin, the same thing applies when they don't have squirt holes which none of the internationl engines have. Throw off is collected in the champher above oiling hole on top of pin end of rod. IH had drilled connecting rods in the earlier years up to maybe in the 1950's but found they had more wear that way and more piston failure than with splash lube. You can also see why excessive clearance or not enough clearance on the rods can effect oil consumption of any given engine.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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