Today I had a situation for which nothing prepared. John Deere 8960, probably a 2012 or 2013 model, bought new and has been on this farm all the time. He has behaved very well. So good, in fact, they never call me to work on it, except for the occasional load of A / C. Thanks to the negligence of someone, on the last day it has been filled with water (and who knows what else) of contaminated fuel. The bad fuel has been removed, the filters have been changed twice, and now it is about getting it to work again. I think it’s a common rail fuel system? Something I do not know anything, and I have no idea where to start. Currently the engine tries to start, hits, ratt down and emits fumes (especially gray and white) for a few seconds and then turns off. We have repeated that process sufficient times to conclude that it is not the answer. I wonder if the system beyond the filters needs to be drained, rinsed, bleeding, or whatever.
The Common Rail system is very difficult to bleed. I have a tractor John Deere 8960 Common Rail that the book says it takes 1200 to 1300 UMPs on the purge pump to purge all system air. The high pressure pump has probably been damaged by water in the fuel causing the metal entry into the injectors. Is the fuel rail accumulating pressure? You could have a bad or something stuck in the pressure relief valve.