These are not modern engines designed to run at 192-208F. The thermostat should be 160F. A very low pressure radiator cap, and unless there is an aftermarket overflow tank, leave 2" of clear space at the top of the radiator for expansion. If you fill it full, it will just dump out 1-2" of coolant each time it's up to temp.
Ethelyn glycol can be added to protect from freezing, but it will not increase the cooling capacity of the water. Temps over 190F should be avoided, and also, cool down after a hot use is a good idea to keep from warping a 60 year old head. Let it idle for a bit after a hard work and let the temps get back down to 160 or so before shutting it off. I usually close the fuel petcock once I'm done, and let the fuel in the line and float empty out for about 2 min, then turn off the key.
The 8x1 tractors are a great strong old beast. My only complait is that few were ordered with power steering. I have a 961 and the power steering makes life on the tractor much nicer.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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