Do you even have a water pump? Early Super A's didn't, they used the Thermosyphon system, which is nothing more than the natural convection currents of the coolant through the radiator and back to the engine. If it has one, it is part of the lower water inlet on the engine block and runs off the generator belt. Many were added aftermarket. It is easy to do.
I have found the original temerature gauges often don't register anything unless you really work the tractor hard on a hot day.
I have an infrared temperature gun that I use to check engine temps, works great and will find hot spots easily. You could also put a cheap meat thermometer in the top of the radiator after it is up to temp and see what that shows. (don't put it back in the kitchen, or the wife will be PO'ed)
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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