I changed my fuel pump as the original one was leaking . The tractor runs vey rich now, like it is flooded. I finally put a gauge on the fuel line to the carb. It is 110 PSI. I am sure this is my problem. Could anyone tell me if the same fuel pump is used for the diesel version of this tractor and perhaps I have the wrong pump. I was expecting to see less than 10 PSI.
- Thread starter Bikerider
- Start date
Ultradog MN
Well-known Member
- Location
- Twin Cities
That is just a cheap diaphragm pump.
Not possible for it to put out 110 psi.
I'm guessing you would blow out the rubber
diaphragm before it would reach 40 psi.
Are you sure you are reading the right
(non metric) scale?
110 Kpa is equal to about 16 psi.
That is in the realm of possibility on one
of those pumps.
Not possible for it to put out 110 psi.
I'm guessing you would blow out the rubber
diaphragm before it would reach 40 psi.
Are you sure you are reading the right
(non metric) scale?
110 Kpa is equal to about 16 psi.
That is in the realm of possibility on one
of those pumps.
UD, The gauge I used is in PSI only. I will test it again and take a video of it. There was some rubber fuel line by the carb where someone added an inline filter, when I first started the tractor with this fuel pump, it split and blew out that hose. I thought it was just old hose. The first gauge I used was 0-30 PSI, it pegged that one like it was nothing. I plan to remove the new pump and put the old leaking one back in. I will check the pressure of the old pump. I am wondering why there is a fuel pump on this tractor. I may run the gas from the tank to the carb direct and see what that does.
Fordfarmer
Well-known Member
After reading this thread, I think the next question is,
does it have an original style, mechanical pump, at
the left front of the engine, or something else? I can't
see that little diaphragm pump making 100+ psi.
does it have an original style, mechanical pump, at
the left front of the engine, or something else? I can't
see that little diaphragm pump making 100+ psi.
WOW.. gotta see how this turns out. Is it a cheap indian pump that was made incorrectly? It doesnt take much of a pump to pump up in the little volume of a hose, but this pump is working overtime.
Thanks for following through. I believe you have identified the problem with the flooding.
I am not sure where it was rebuilt, but I plan to put the original pump back in next week. It leaks, but not so bad that I can 't use the tractor. I plan to document the pressure of the new and old one and send the new one back. I can report that I did install a fuel pressure regulator before the carb and the tractor runs okay. I had the regulator set for 2 PSI. I do not plan to leave the regulator in line, I am hoping a new pump will solve all my problems. I was thinking I had a carb issue, but I am pretty sure this will be solved with getting the fuel pressure in a range that the needle ,seat and float can control. I just hope the float isn't bent now.
(quoted from post at 20:55:59 07/15/15)
final report; Bought another fuel pump form the local NH dealer. Pump was made in Turkey. Installed and checked output pressure, this one is at 3 PSI. Tractor starts and now runs fine now, and no more gas leaks!
Thanks, will remember this one for future problems. 3 lbs will about right for that carb..Never more than 5 lbs.
I was really hoping I was done with the fuel pump issue on this new to me tractor... but, it continues. The pump I got from my local New Holland dealer worked for 2 days. Yesterday , when I turned on the gas shut off below the tank, gas was running out on the ground below the pump ( and I had not yet started the tractor). It turns out that the gasket on the top of the pump, by the screen, had swollen up and started to leak, no matter how tight I made the screw on the top. I pulled it apart and the gasket was so swollen, it would not fit back where it should go. I went all over town looking for something to use to make this pump quit leaking. I found nothing that I felt I could live with, so I pulled the pump and tomorrow I will return it. I am wondering where I can find a pump that will work. I am loosing faith in the quality of the aftermarket parts supply and all I want is to start using this tractor.
Latest update; Today my second fuel pump came in at my local dealer. I picked it up and have just finished installing it. I am happy to report that this one does not leak and seems to work well. I does say "made in India " on the box and I was worried that it would have semis' as the first one I got was made in India also and it did not work. I did pull the radiator to install this pump and that sure made it easy. Time will tell, but for the moment, I am back to being able to use my tractor.
My similar situation!
1976 Ford 2600, gasoline. Original fuel pump. Marked: A. Pierburg K.G. NeuB Fo8 4 186
Tractor suffering gas starvation on original pump.
Ordered aftermarket pump F2NN9350AA
Arrived box labeled Fuel Lift Pump 1103-3001 Quality Tractor Supply, Made in India 7/10/15.
Orientation of fuel lines not correct to original but easy to rotate after remove the six screws.
With pump installed and engine running it was clear the pump was putting out very high pressure (pulsing in the lines, surging visible via sediment bowl, carb overflowing from drain like crazy, tractor running rich).
After a while running, pressure seemed to settle down, carb no longer overflowed.
Then, not enough pressure, tractor starved for fuel. Pulled outlet line off pump to see just dribbling when cranking engine.
Removed new, failed pump. Ordered replacement from New Holland dealer. Pump arrived in box labeled: CNH Original Parts, Gold Value F2NN9350AA, made in India.
Will install this weekend and keep fingers crossed.
What is going on with these pumps?
Would like to rebuild the original but New Holland says no kit available.
Thanks for sharing your experience which sure seems identical.
1976 Ford 2600, gasoline. Original fuel pump. Marked: A. Pierburg K.G. NeuB Fo8 4 186
Tractor suffering gas starvation on original pump.
Ordered aftermarket pump F2NN9350AA
Arrived box labeled Fuel Lift Pump 1103-3001 Quality Tractor Supply, Made in India 7/10/15.
Orientation of fuel lines not correct to original but easy to rotate after remove the six screws.
With pump installed and engine running it was clear the pump was putting out very high pressure (pulsing in the lines, surging visible via sediment bowl, carb overflowing from drain like crazy, tractor running rich).
After a while running, pressure seemed to settle down, carb no longer overflowed.
Then, not enough pressure, tractor starved for fuel. Pulled outlet line off pump to see just dribbling when cranking engine.
Removed new, failed pump. Ordered replacement from New Holland dealer. Pump arrived in box labeled: CNH Original Parts, Gold Value F2NN9350AA, made in India.
Will install this weekend and keep fingers crossed.
What is going on with these pumps?
Would like to rebuild the original but New Holland says no kit available.
Thanks for sharing your experience which sure seems identical.
Gould,
My original pump matches yours exactly. (Pierburg) One of the ones I had, had the suction and discharge reversed and I had to bend my fuel lines to hook it up. The top was also different and leaked and would not seal. Third one seems to be working well , but what a pain it was to have to keep changing that fuel pump. I have had several people tell me that this seems to be a trend in vintage car and tractor parts, they do not work well with the modern gasoline. I looked every place I could to find a rebuild kit, nothing out there. Don't know what we would do if we ever tried to clean the screen in the top of the pump, you can't get a gasket for it anywhere.
Thank you for your insights. I'd further appreciate it if you might shed light on
how one can determine if the ports are reversed. Since the castings are the
same, it's possible the inner parts can be set up to reverse suction and
discharge? I've found I needed to remove the six top screws in order to rotated
the orientation of the suction and discharge in order to match original pump and
orientation of the lines but this would not cause reversal. Thank you
how one can determine if the ports are reversed. Since the castings are the
same, it's possible the inner parts can be set up to reverse suction and
discharge? I've found I needed to remove the six top screws in order to rotated
the orientation of the suction and discharge in order to match original pump and
orientation of the lines but this would not cause reversal. Thank you
I too had to had to remove the screws and move the pump to get the ports where they belong. Since the first "new " pump was delivering such high pressure for me, I checked each new one before I installed it. Easy to do, just screw a small gauge into one of the ports and pump the bottom shaft of the pump and see what kind of pressure it develops. You can actually determine suction and discharge by just using your finger over one of the ports and pumping the pump with your hand to see which port is sucking and which one is discharging. Hope this helps.
Hoosier Martin
New User
I just installed a New Holland dealer's F2NN9350AA (made in India) fuel pump on my 3400. Failed in 60 seconds - assume it's a ruptured diaphragm based on initial finding. Fuel is pumping out of the side air vent hole below the diaphragm. I was replacing a 20 year old pump as a preventative maintenance measure while replacing a failed water pump. Based on everyone’s experiences here I may be best served to re-install my old one.
Hoosier Martin
New User
I picked up another stock fuel pump exchange from our local N.H. dealer to give a new pump another chance. It is now installed and working properly (a least for now). I did note the 2nd pump was packed thoroughly with light oil inside and out (first pump was packed dry). Also, I first rigged a test line to a fuel capture bucket for output. Cranked the engine until I was fully convinced it was pumping correctly and at low pressures. Reconnected the carb fuel line and it started properly and ran properly. The only condition I can think of that might have caused this apparent high pressure is stuck flap valves; maybe the light oil kept it in good shape while on the shelf (bit of a mystery).
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