pblanton
Bronze Member
I run mine full throttle for 20 minutes with no load, just put it in neutral and let it run. This has to be done about every 25 hours ~. This has always made the idiot light go out. A perminent fix would be to remove n replace the dpf with an earlier gen muffler. Believe the dealer to be a good source for this part.
You don't need to go to earlier gen, as the tractors are sold overseas without the stupid DPF. The Kukje part number for the "silencer" as they call it, is HRK0600800A0 for the 2015 3520H and apparently the price from a local dealer is about $330. That should be a bolt-on solution or (delete kit) for these tractors. The only outstanding question is, can I just remove the sensors and plug the vent tube?
I also talked to a local diesel mechanic and he said that there is nothing special about the muffler, so any muffler will do. All you need to do is to take off the DPF and have a muffler shop bend and weld up a set of inlet and tailpieces for a standard muffler, that match the shape of the DPF, so you can have a bolt-on replacement. Seems to me the price for that would be about a push so I'll probably just order the Kukje part.
Another option is to just bust out the guts of the DPF can, but since it's a $1000 part, I'd send it out to get it cleaned and keep it in a box in the barn in case you ever sell the tractor to someone who loves the assspain of an unreliable tool.