Mdhughes, thank you, I assume you are meaning to say that the 3301/3901's do not have a screen that you can display the dpf level on?
Yooper, the 3560 has an "intellipanel" screen for the dashboard. Besides some stuff it displays all the time, you can change what is shown in the middle by pushing a button to the left of the steering wheel, each press makes it show something else and you can use a sustained press to choose and set some features of the hst. It is kind of like the display on my truck where you scroll through stuff like %oil life, ave mpg etc. On the tractor there are about 5 views to choose from, and one is a bar graph of the dpf. It is useful, you can plan ahead so the regen goes smoothly and you have something for it to do which needs the high rpm.
Would you guys please describe (the next time you have some "spare" time) what you see on your displays and the regen instructions and I'll link to it for the tier 4 thread. Or put it in that thread. I have been wondering how different the various 2014 2015 models were, and short of going to a dealer that doesn't know I already have a tractor and asking to drive a 3301, I haven't found a way to find out. Not curious enough to buy a manual it was bad enough paying for the WSM for mine.