DogDiesel
New member
85 JD-850 4x4. Yanmar 3T80J engine. Previous owner say he had the injector pump rebuilt and geadgasket replaced.
Background. Tractor would not run when I got it, PO thought it was a compression issue. Cranked but would not start. After I replaced every rubber fuel line, and bled the system, it bleeds off and runs. Some of the rubber had green paint on it, and the PO owned it for 23 years. The rubber fuel lines were leaking and not sealing correctly.
Today's problem: Absolutely NO FUEL ever runs out of the return line to the fuel tank. I get fuel if I bleed the injectors, not a gush, but it bleeds and starts. I pulled the return line from the tank, filled the line with diesel, filling the thermostart reservoir. Presurized the system. Previously, it would run, but never fill the reservoir. Starts every time, after sitting. It is bled. I presurized the tank at the return line, and no weaps or leaks. Tractor runs smooth and fairly strong. I rototilled my garden as a test with a 72" Kingcutter rotortiller, and it would get down 8 inches, but I was working it. Tends to droop in teen RPMs under moderate load, works strong near full throttle.
Question: I should get fuel return back to the tank, right?
Wayne
Background. Tractor would not run when I got it, PO thought it was a compression issue. Cranked but would not start. After I replaced every rubber fuel line, and bled the system, it bleeds off and runs. Some of the rubber had green paint on it, and the PO owned it for 23 years. The rubber fuel lines were leaking and not sealing correctly.
Today's problem: Absolutely NO FUEL ever runs out of the return line to the fuel tank. I get fuel if I bleed the injectors, not a gush, but it bleeds and starts. I pulled the return line from the tank, filled the line with diesel, filling the thermostart reservoir. Presurized the system. Previously, it would run, but never fill the reservoir. Starts every time, after sitting. It is bled. I presurized the tank at the return line, and no weaps or leaks. Tractor runs smooth and fairly strong. I rototilled my garden as a test with a 72" Kingcutter rotortiller, and it would get down 8 inches, but I was working it. Tends to droop in teen RPMs under moderate load, works strong near full throttle.
Question: I should get fuel return back to the tank, right?
Wayne