I have the same problem with another 9600, however it got worse the then the machine altogether would stop too, engine still wide open, I found it to be bad connections on the wiring harnesses that plug into the side of the cab, one had a broken retaining nut so it was no longer tight, and as it ran longer the contact pins in the connector had too much pressure on them from the harness sagging that it spread several of the female connector pins causing all kinds of problems. dealer is working on the problem now. I narrowed the problem down to the one harness on the top left of those at the corner cab, I would dissengage the machine but leave the auger swing swith in out position, this function never worked when the head would stop, wiggled the harness and I could feel the machine rock a bit when the connector had finally made connection and the auger would begin to swing.