Sorry I called you skip earlier, just missed your name at the end of your post. That further clarification helps, too. I knew about the cam lobes inside a conventional injection pump, but I also knew that those couldn"t serve to operate the Jake Brake, which was the source of my confusion. Now, I understand the concept of "unit injection," which uses a cam lobe on the main camshaft to actuate a pump integral to the injector itself. So, it all makes sense now.
One of the websites I looked at while trying to unravel all this implied that diesel engines are simpler than gasoline engines because they don"t require an ignition system. Not sure I"d subscribe to that theory - seems to me like the added complexity of the diesel fuel-injection system (and the varieties thereof) might counterbalance the simplicity of no ignition system.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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