Posted by Tom McKenna on November 26, 2012 at 13:48:52 from (24.14.250.208):
1983 John Deere 8450. 5900 hrs. It will not start. Problem is fuel starvation -- will run a little on either. I cannot build any pressure on the hand priming pump, which tells me I"m not getting any diesel from the fuel tanks. I pulled the fuel line to the injector pump and no pressure or fuel when I hand prime or when I crank the engine. I will replace the glass filters, but I doubt this does any good, b/c I have never seen these clogged to the point where I get nothing thru them. There is also an in-line fuel strainer -- could it be clogged? I plan to replace this too. Parts books says there is a fuel check valve -- where it is I don"t know. Could this be stuck closed? Any other ideas out there before I start replacing parts?
Fuel tanks are full and this machine does not have the fuel / water separator device
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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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