George I was introduced to teflon tape as a thread sealer fifty years ago as you probably were too. Lately I have heard teflon tape is is a thread lubricant and it might seal the threads too. In a perfect world we should not need thread sealer but not many pipe threads are cut perfectly centered with consistent thread depth all the way around, meaning Chinese. I have put together a lot of hydraulic pipe fittings with no sealer and they sealed up just fine but maybe the oil was the lubricant allowing me to get it a bit tighter. Plastic fittings are supposed to not need a sealer but anyone who has pumped liquid nitrogen through plastic fittings finds out the fittings need teflon AND pipe dope together and the fitting might still leak.
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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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