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 - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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