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Bleeding fuel lines
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Posted by Ray in Ga. on April 11, 2006 at 16:23:29 from (68.215.209.85):
I"ve been fixing up an IH 484 for a friend who came by it when he bought a house. The previous owner left it behind. Been piddling around with it since last August replacing seals, water pump, beating out dents:-) When I started, I knew nothing about tractors or diesel engines. That became readily apparent when I told my son I was going to get some spark plugs and tune it up. When he got done laughing at me, I ran to the internet to study up:-) All this time, thought the thing has run great. Always cranks right up and I have run it for hours at a time. The other day the tractor stalled for the first time. I discovered a piece of plastic bag hanging off of the fuel float and figured that was blocking my fuel line. Also fished out a gas can funnel and cap while I was in there! I went ahead and replaced both fuel filters and bled them through the top screws. Problem is now it runs great for around 30 minutes and then dies a slow death. Sometimes it will crank back up, but will only run for a couple of minutes. I checked to see if fuel would come out of the bleed screws on both fuel filters. Nothing comes out. I tried both filters every few minutes with no luck. Then after about 15 minutes or so, the fuel started flowing again. I have traced the fuel lines looking for a fuel pump to no avail. I am beginning to think it is incorporated into the fuel injector pump, though everything I read leads me to believe there should be a separate pump somewhere. Can someone explain this system to me and tell me where the fuel pump is? How do I bleed this thing correctly, especially if I can"t find a fuel pump? The owners manual says to bleed the system, then crank up the engine. So I have to believe there is a manual way to force the air out. Or could it be something else entirely?
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