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| Hey Guys, have a problem with the fuel draining back on my 1997 9400 this engine has the older style fuel system with two filters. Has anyone else had this problem if so what did they do to fix it.
Right now before I start it I have to open the bleed valve and pump it to get it primed otherwise it will start and run for a minute or so then stall.
any suggestions?
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NE SD | On my uncle's 9300 we had that problem if we ever ran it real low on fuel until we took the checkvalve out and cleaned it. It seemed when the people that manufactured the fuel tank cut the threads on the filler neck and stuff they didn't get the plastic pieces all out and it would suck some up when ran nearly empty. |
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| Running these tractors low on fuel {especially the earlier ones} will cause the fuel pump to gulp a small amount of air when the fuel "sloshes" just right. The fuel circuit gets foamy, yet continues to run pretty good - Until you shut off the engine. Then the foam in the fuel rails seperates into straight fuel with air pockets. Now the thing won't want to start unless you bleed it first. You can see this for yourself by adding a clear plastic hose {temporary!} to monitor the fuel leaving the engine on its way back to the tank.
But I have a hunch Canfarmer will have to remove and reseal the injectors and cups. |
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missouri | We have a 7610 that ha da similiar problem. Check all your fuel lines if there wet replace amke sure all fitting and hose clamps are tight . This worked for us and the tractor starts fine now. |
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sc kansas | On our 8770 (dont know if it is the same) we had to replace the orings on the lines going to the filters and from the filters. It was getting just emough air to bleed back after two or three days sitting. |
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NESD | A customer had a 9300 that would not start intermittently, would be fine for weeks and then suddenly not start, we tried everything we could think of, and just when we thought it was solved it would act up again, I finally replaced every o-ring in the fuel system from the tank to the cylinder head and it seemed to resolve the no start condition, apparently there was an O-ring somewhere that was allowing air into the system but would not leak fuel out. |
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Northeast Nebraska | I fixed that exact problem on our 9300. We also have the early style fuel system with 2 fuel filters. Found a small crack in the intake manifold where one of the fuel lines screws into it. We also replaced all the fuel lines, all the o-rings, and both check valves.
We screwed up though. We would not of had to replace the intake manifold if we would have updated to the new stlye fuel system with the single fuel filter. I highly suggest you update to the new style. John Deere changed it for a reason and this is one of them I imagine. |
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| That's a good idea.
Be sure to take a good look at the back of the 9400 cylinder head. I have had some problems with the short {less than a foot} hose between the pump and the fuel manifold.
Edited by Rex Hellwig 4/13/2009 07:37
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| Thanks for all the responses guys I will be working on it this week some time to see if I can get it fixed. |
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South Dakota | Fuel would drain back and it wouldnt start sometimes when it was least expected but never went more then 80 hours without it happening. Replacing filters meant calling Dealer to pressurize system. New filters and then a new fuel filter canister which didnt solve the problem. I think the problem is now solved when the mechanic found no O-rings on the fuel injectors. I was told my 2003 model didnt have o-rings but the 2004 did but JD company didnt cover the that even though it was on extended warantee. Only because my dealer stayed with me and helped me with this did this get solved. Warantee work has become negotiation. |
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Fuel Drain back JD 9400 tractor?
