Posted by JHesler on October 25, 2016 at 17:55:44 from (104.255.86.176):
My JD 310 backhoe has been running great for years. A couple days ago the injection developed a problem. Was running fine for a few hours then lost power and quit.
Here's what I've checked... Plenty of fuel in tank, Replaced fuel filter, New lift pump, Plenty of fuel flow to injector pump while manual priming, Checked injector pump inlet filter it's clean, Checked and blew out return lines all clean, Checked return line pressure valve (check valve) not working great but it is clear and relieving pressure from the governor chamber. Checked air cleaner and ducts all clear. Bled air out of fuel at injectors. Checked shut off solenoid its clicking and sounds like it's moving the right parts inside.
Here's what it does...Starts and runs great for about a minute then slowly fizzles out and stops. Let it set for a while and it does the same thing.
I suppose getting into the injection pump is my next job but I can't imagine what would be going on inside the pump to account for such behavior.
Maybe I'm just missing something obvious and would greatly appreciate you guys sharing your ideas.
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