Contaminated fuel problem

bleeding the fuel system Problems

Today I have had a situation for which I was not at all prepared. John Deere 7230, probably a 2012 or 2013 model, it was bought new and has been on this farm all the time. It has been great. So good in fact, they never call me to work on it except for the occasional A / C load. Thanks to someone’s negligence it got some water (and who knows what else) from contaminated fuel in the last day or so. Bad fuel has been removed, filters have been switch twice, and now it’s a matter of getting it to work again. I think it is a common rail fuel system? Something that I don’t know anything about, and I don’t have no idea where to start. Currently the engine tries to start, thumps, rattles and fumes (mostly gray and white) for a few seconds and then shuts down. We have repeated that process enough times to conclude that it is not the answer. I wonder if the system past the filters needs to be drained, flushed, bled, or whatever is?

The common rail system is very difficult to bleed. I have a 7810 common rail tractor that the book says takes 1200 to 1300 umps at the bleed pump to bleed all the air out of the system. The high pressure pump has probably been damaged by water in the fuel causing metal to enter the injectors. Is the fuel rail building pressure? You could have a bad or something stuck in the pressure relief valve.

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