Posted by old bob on November 12, 2016 at 13:10:25 from (166.137.136.34):
I have a 4020 diesel. Don't hardly use it anymore. Got it out to sell it and it has problems running.
Haven't fired it up since last fall. When I did I changed the oil and all the filters. New hydraulic filters and new fuel filters. Put it back in the barn and haven't started it since.
Started it a couple of days ago and it ran good for a couple of minutes then began to lose rpms.
Put new fuel filters on again today. When I dumped the filters out I had taken off it there was nothing in the filters but diesel. No water. No trash.
I can make it run by taking the screw on the side of the injector pump out. Runs good with screw out. When I put the screw back in it takes a couple of minutes and it loses its rpms again. Take the screw back out and it runs again. Put the screw in and it loses rpms. Tractor does not miss or smoke.
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