Pure Grit: 9100 ECU Hail Mary, Electrical Gremlins & Wrenching Past Sundown.

This one’s all about pushing through—no matter what it takes. The saga of the John Deere 9100 finally comes to a head with one last HAIL MARY: a new ECU and a sketchy benchtop reprogramming trick… and it WORKED. The 9100 is back from the dead and running strong.

But no rest for the weary—next up is a 9560RT with starting issues. Quick diagnosis points to a failed low-pressure fuel pump, and we’re back the next day to knock it out.

Then the 8310RT throws a new curveball—zero cab power. After chasing down hidden electrical gremlins, we get it buttoned up and return to replace the battery cables.

And just when the day should be done, the 9360R shows up leaking coolant and burning through fan drives. Hood off, radiator out, fan system overhaul—this one turns into a full-on teardown that stretches all the way to sundown.

This is what it looks like when you don’t quit. No shortcuts. Just pure grit.

Thanks to Sloan Implement and John Deere for their continued support.

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