Southern Pa. | JD Farmering - 5/28/2015 20:16
Thank you sir!!
Got the pump off tonight. Looking at this thing we are guessing here but believe that diaphram has a line going to the intake manifold....so the turbo boost is operating the diaphram to increase fuel delivery at boost.....there is also a line connected on the other side of it that runs to the return line to the tank.
I think if I am right, that's how we are pressurizing the tank when the diaphram is blown......
If I am right, then this dang thing could have been replaced while the pump was on the tractor.....we shall see....
I honestly don't think that you would have an aneroid fuel control and a fuel return line ending in the same "pot". If you did, then anytime you would have a no/low boost situation your return fuel could potentially end up in the intake manifold.
On a side note, l always felt our 6410 was kinda lazy, even before it developed the same problem yours seems to have. If your pump ends up on the test stand, l would recommend giving it a little extra fuel. (Maybe like 15 percent?) There is an external screw that could be used to trim it back if you felt it was excessive.(only trims the fuel back from about 1500 rpms and up, doesn't affect the lower rpms) This could be done without "opening" the pump.
Good luck!
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6410 fuel issues
