I used to have a 2007 790 with a 300 loader. I needed a larger tractor, so I purchased a new 4044R. Actually, it was about a year old sitting on the dealers lot without a loader. I also purchased a 440R NSL loader with the one point connector that the dealer installed. The tractor was delivered with 7.9 engine hrs, 2.5 vehicle hours and 19% soot level. I knew nothing of the emission changes that were implemented over the last few years, so the DPF was kind of a surprise.
My first usage was to mow a 5 acre field recently taken for hay. I used a Frontier 5’ finish mower and ran the tractor at 2500 RPM. The soot level continued to climb to 52% when I was done. Continued usage around home has raised the soot level to 70% even while keeping the RPM at 1500-1800. Today, i mowed the hayfield again at 2500 RPM in the cross direction to try and make the tractor perform an active regen. The soot level climbed to 77% and then it appeared to perform a passive regen as the soot level started slowly dropping to 71%, but then climbed back to 77%. Then it again appeared to do the passive regen dropping to 72%, but then increasing again. I finished with a soot level of 74%. Engine hrs at 26.
Does anybody know at what soot level it starts an Active regen? Ive tried to research on this forum and others, but haven’t found much other than if you cancel the auto regen, you’ll eventually have to perform a parked regen.
I really like this tractor, but the DPF seems to be a black box at the moment.