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| So I went and blew main fuel line it was plugged put new Napa fuel filters on bled them and bled at pump crank tractor up ran good for 3 minutes did the same thing died out. Took inlet screen out of pump the screen that has fuel supply going to it and it was clean , made sure I had good fuel, took return check valve off and cranked tractor up tractor ran good fitting looked clean didn’t see any chunks of debry or under the injection pump timing cover fuel looked clean . Blew return to tank and I could hear air going into tank, the line coming off injectors appeared to be clean . I took return fitting off and started tractor and it ran fuel was coming out of pump good , I’m. It sure why their wasn’t any fuel coming out of leak off line from injectors? The issue I have looks to be a stuck or faulty check valve. My question is can you run the tractor without the check valve in it .
Edited by Kory20 9/17/2025 20:30
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 IMG_1415 (full).png (112KB - 8 downloads)
IMG_1415 (full).png (112KB - 5 downloads)
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Farmall 856 diesel update
