Slow 4 inline cylinder engines in early tractors were balanced by equal weight moving parts. The pistons on the ends move up, the pistons in the middle move down. The crank and engine are modestly balanced. As more speed and HP were asked of the designs, the harmonics and end to end balance issues were breaking cranks. To reduce breakage and improve operator comfort, 2 more main bearings, and counter weights have been built into the design These are inherently out of balance these vibrations need balance shafts to get them under control. This is not intended to be a high science definition. But I hope it makes sense. Jim
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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