I got mine March 2014 to cut grass and snow blow. ( missed last snow season)I have 37 hours on it . Last cold season, I had regen issues and ultimately had a ignitor replaced. Had a high temp alarm shut down in middle of road...had to tow out of way. I'd have to say 25 of the 37 hours have been in regeneration of dpf. ..mostly debugging ignitor. My use has not been for long enough time periods to regeneration on the move. I cut grass in less than 20 minutes ( perhaps over kill on machine..but wanted cab). So regens are parked. The regen before last, took two in a row to clear. Last time was by the book.
Mine would start "ok" when cold. Less smooth than my 2007 L39TLB on startup. 3 cylinders (and 352 hours) versus 4 on
B3350. My
L39 has a glow plug timer based on water temp.
B3350 you have to guess how long to preheat. Typically requires more than one try at cold start. Turns over but doesn't stay running. I will have better data here shortly. Currently switching to snow blower.
I initially was going for the
B2650 but my dealer guestioned whether there would be enough hp for cutter, a/c, rear pickup blower and hills on my yard. So I upgraded. He offered a test machine in the spring. I was too impatient. I should have tried the smaller machine. My dealer had a
B3300 xxx with cab ( previous B series cab model) but I wanted the heavier lift of the LA 543 loader with the quick connect to match my
L39.
To answer your question, Kubota doesn't have this tier IV correct on this machine. (My great satisfaction with my
L39(first tractor) bled over to my thoughts of "Kubota wouldn't make a bad machine" with the dealer hesitation and warning on tier IV ) But I love the cab and other features. Hoping Kubota will come up with a "fix" to the issues. I'll have a better opinion after this winter. Hope this made sense and helps. rob