George ...... would a '36 D run on diesel I wonder? Perhaps he was switching it over to distillate (or that's what was supposed to be in the main or big tank). JD's model R was their first real diesel offering I believe, somewhat later than 1936. And they did have their version of "water injection" ..... here's a bit of info from some web surfing .....
But kerosene has its drawbacks. Mainly, it does not vaporize as readily as gasoline, and it has a much lower octane content. That usually meant intake air and the intake manifold had to be heated to improve vaporization, the combustion chamber had to be carefully designed and kept clean to prevent knock, and for some engines (Rumely OilPull and the early John Deere D, for instance) water was injected into the cylinders to moderate combustion so as to further prevent combustion knock. These engines do not “burn” water, as some people think. The addition of water merely moderates the combustion rate to reduce knock and prevent engine damage. The trade-off, though, is that water injection reduces overall engine efficiency.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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