Posted by George Marsh on April 22, 2012 at 11:32:05 from (50.104.235.201):
In Reply to: starter commutator posted by montidale on April 22, 2012 at 10:46:29:
I've used emery cloth or wet and dry 200-300 sandpaper. Most commutators have an insulation between segments. However if yours doesn't use a tooth pick and scrape out the copper between the segments. If you have deep pits, you may have to use something rougher and then polish with finer.
I like wet and dry sandpaper, because it doesn't leave particles of sand behind.
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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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