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JD 770 Fuel Problems
|Stanley||I just bought a JD 770 and it hasn't been cranked for a while. Fuel is going to center injector but not the others. Can anyone give me a heads up on what I should check?
|Dale G. Basgall||Stanley; make sure when you turn the ignition key on, the electrical wire going to the top of the fuel injection pump has voltage, also listen carefully at the fuel injection pump to hear the click when the switch is turned on and energizes the fuel shutoff solenoid . When you crank the engine make sure your throttle is wide open or it can take along time to get fuel. Make sure all the injector line nuts are lostened. If you can't get fuel at the injectors take the lines lose at the fuel injection pump.
Those have a small screen in the bottom of the fuel tank that plugs up and stops the fuel flow to the transfer pump. If you can't get fuel after removing the fuel line from the inlet of the transfer pump work your way back to the fuel tank outlet.
|toomboy||Have you loosened the injector lines at the other two injectors to see if fuel is going to them? If it is, the injectors may be stuck, or if not, the lines may be plugged, you can remove them from the pump and blow air through them to see.
|Dale G. Basgall||toomboy I thought a 770 was a john Deere motor grader built around late 70 or early 80's. then came out with the 772 series and so on. Is that correct is the 770 something else like an ag tractor?
|Dale G. Basgall||Is that a 770 John Deere Motor Grader with a 6-cylinder diesel engine?
|tomboy||He said he as getting fuel to the center injector, on a 6 cyl which cyl would be the center one?
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