Posted by Superturbodiesel on February 03, 2011 at 13:05:22 from (69.207.64.47):
In Reply to: 2940 won't run posted by tjiniowa on February 03, 2011 at 12:12:58:
Does your 2940 have a pull-cable fuel shut off, or is it an electric solenoid (start key operated) fuel shut off?
If solenoid controlled, make sure the solenoid is pushing (or pulling, depending on its setup) the fuel shut off lever on the injection pump back to the Run position when the key is turned on. Electric solenoids do fail every now and then. Some fuel shut-off solenoids are spring-loaded to pull fuel off, and electro-magneted to push fuel on, but I've seen 'em designed to work the opposite way as well.
If that's not it...
Time to change your fuel filter(s) and then bleed the system of all air.
You have to have good flow through the filter(s). I've seen many plug up with fuel bacteria (looks & feels like black sludge) and shut the tractor right off. Once you replace the fuel filter(s) you will also need to use the hand primer on the lift pump to bleed the air from the filter housing, as well as to assure yourself that fuel is flowing freely from the filter housing down to the injection pump.
If she still won't go, check to see that you have good flow from your lift pump (the mechanical one that feeds your injection pump) by removing the outlet line and cranking the engine over. If the fuel really shoots out, then the lift pump is good. If not, you need a lift pump. (That's the cheap one.)
Finally, crank the engine with the injection lines loosened or even removed from the injection pump. Fuel should really flow like mad out of the injection pump. If not, your injection pump is shot. At this point, you have 2 things to do. One, get a manual and time the pump BEFORE removing it from the engine for repair. Two, also go buy a new lift pump and replace it at the same time you put a new injection pump on. It's really good insurance, as a bad lift pump can destroy an injection pump.
A few back, our JD 2630 and JD 2555 both decided to die. The 2630 started surging and running bad and eventually died. The 2555 just plain shut right off. Both tractors needed new fuel filters, bled the air, and they were up and running again. Turned out that we had a bacteria problem in our bulk diesel storage tank, and it was "gumming-up" the works.
A few years ago my JD 2555 shut down on me while I was just driving along. Turned out that the injection pump took a dump. Tractor had somewhere around 6,000 hours on the clock at the time.
I hate to say it, but from what you described, if you have good fuel flow to the injection pump, your injection pump is probably shot and it's time for a rebuild.
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