On some irrigation pumps and oil wells, the engine may run continously for days on end. Since the collant system is non pressurized and basically evaporative, if the coolant ran down, the engine would overhead and sieze up. So they would rig up a valve in the hose and adjust the flow so that it would exchange the water but not too fast.
I could not find the pic I had of a P-12 hooked up to a 500 gallon wooden barrel as it was pumping away on an oil well.
Keep in mind the C113 engine in the f-12/14 is the same as in the A&B; it was a WWII high precision engine that is very efficient and practically bulletproof.
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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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