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Modern Tractor Discussion Board

Topic: JD-850 Air in Fuel Lines
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Wayneb

06-23-2014 13:29:25
132.159.85.146
23749



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1984 JD 850 4x4 w/loader 5125 hrs. 3 new hours! The parts I ordered have not arrived, but replace the fuel lines with automotive fuel line and got it running. Still running an aftermarket filter, waiting new filter cartridge and o-ring and the RIGHT return line hose.

{Let me rant} Not much, cause I bought this thing fairly cheap. But the PO paid over $2K for rebuild of injector pump and head-gasket, but the fuel return lines were, WHAT? 20 years old? Still had green paint from some previous painting. Original? What possesses an owner to pay that much for a hard part (IP) rebuild and not replace a cheap hose. One spot on one line was pulsing. Heck it didn"t leak much...
It is the lines and the filter for sure. When I can get it to seal with the lines I have, it is strong. {end rant}

So far I have drilled/tapped out four 14mm broken bolts and have a few more 12mm up front on the loader.

And dirty. Fairly sure it had never been cleaned. Had bought a new tractor 8 months ago of different color and too it was dirty, looking 10 years old. Not that clean tractors and wax is what I am suggesting, but when grease and mud is caked and baked...

Wayne

After cleaning, its a nice looking tractor. Good rubber. Everything works, or can be fixed.

Other than its frustrating to

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WayneB

07-04-2014 07:23:14
67.142.163.23
23756



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Re: JD-850 Air in Fuel Lines in reply to Wayneb, 06-23-2014 13:29:25  
After I got the right line from #3 injector to the therostart reservoir, plus replaced filter, o-ring and lines to tank, I came to No Longer Available for lines from 1-2 and 2-3 injector return line. I used VW return line and it worked great.
Bottom Line: Bled out, starts well, idles nice and has good power. Great sounding engine.

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WayneB

07-06-2014 20:01:07
67.142.163.23
23758



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Re: JD-850 Air in Fuel Lines in reply to WayneB, 07-04-2014 07:23:14  
Change oil, converted to Mystic 15W40. It is a 50/50 blend. Every diesel I have put Mystic in does well. After another 4 hours the oil is clear and the exhaust is clean. I pulled it hard and the exhaust is light and nice. I put a 72" King Kutter rotor-tiller on it and buried it down 8 inches. Worked it as hard as I could. And the oil is still clear. I'd say I fixed the fuel problem.

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