I bought a new L3902 this summer and now have 47 hours on it. It’s been used for a lot of grapple work running at 2100 rpms and some stump grinding at pto speed. Most of the time I run it for hours and the weather has been hot during use. I haven’t had a regen yet. Should I be concerned about that?
Nope.
The higher RPMs and PTO RPMS (which are higher) you most likely are keeping everything burnt off or adding minimal amount.
Cold weather, you have idle time to let the tractor warm up, you may not be using the PTO as much, so the DPF will get clogged sooner due to less heat.
So far this summer, I have regenned one time. Winter time, I regen more often.