He said this tractor is a pre-DEF tractor. I am no expert on these new emission system, but I have gleaned a lot of info watching videos of a guy that does repair work in upper California state. From what I know the parked regen is only an option on an engine that utilizes DEF. The injection of the DEF which is a urea product that acts as an oxidizer raises the temperature of the filter surfaces in the exhaust filter to burn away particulates and clean the filter. As pointed out above, this is a pre DEF tractor it does not have the ability to do a self-regeneration. I believe on those tractors that the filter has to be removed an sent to a special vendor to have it cleaned. I also could be way off base. I am pretty certain as stated above this machine cannot do its own regen. I attached a JD video on a parked regen. Right before they get into how to start the regen they show a diagram of the system and it shows a DEF tank.
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