The B3350 has a couple of different things in the regen procedure. I have the OM and the WSM for the 2650 and it includes the regen procedures for the 3350, but I don't have any practical experience. If you look in your owner's manual on p16 it says when the regeneration interval is less than 4 hrs a parked regen will be required. I don't know if this means you should inhibit auto regen and force it to beep at you so you can do a parked regen or what. The shop manual describes something called a DOC regeneration, and the intervals for that are 9 hrs, 9 hrs, 3 hrs, 2 hrs, and then it will request a DOC regen which as near as I can tell would be like the dpf regen. If you come to understand this from your tractor I'd sure like to know. This DOC regen is only mentioned in the 3350 manual. Maybe yours did it, and that was the sparks?
Yesterday as soon as the tractor warmed up it started beeping and the parked regen light came on.This was approximately 1 1/2 hours after the last regen.It did pretty much what it was supposed to do,but as soon as it automatically idled down the regular regen light came on and it idled about 15 minutes before it went off.That was unexpected and it confused me.This first parked regen came on at 77.7 hours.I have the WSM also and from what it seems the DOC regen is just another name for parked regen??