First check your fluids. Radiator low? oil overfull? The 466's are known for liner pin holing, if the coolant hasn't been maintained. Second check your fan clutch,if it is a viscous drive, and it spins real easy with the engine off,it isn't moving any air. If it is a horton air operated clutch(don't know how the truck is spec'd)make sure it is engaging. If it is a Horton there should be a switch on the dash to override the temp sensor and make the fan lock up regardless of engine temp. The clutches wear out on the Hortons and don't engage, but there is a provision to lock it up manually with a bolt to get you home as a temp fix. Another thing could be the torque converter is weak and heating up the trans fluid,which in turn heats up the coolant.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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