Posted by kendak on March 29, 2009 at 16:56:59 from (96.18.123.157):
need some help please...working on a JD 720 LP tractor ...12V neg. ground...tried the Pertronix unit & when I pulled a plug wire the spark spike burned the new unit up...talked to pertronix & they tell me thats what happens if you pull a wire [suppose to ground it out not pull it off]..anyhow installed new points & cond. & tractor ran good for about 5 min. & quit ..the points had gotten so hot that they were blue & burned...I did install a new Blaster 2 coil at the same time as the Pertronix using ballast resistor that came with coil..I think now that the coil is the problem with both units ..can anyone enlighten me...thanks ..Kent
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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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