My L3830 uses a TA040-93220 inner filter and a TA040-93230 outer filter. Personally, I would not think of operating the tractor without both filters. I replace both filters every 100 hours.
I do work in exteme dust and chaff. Every hour or so (when the engine temperature gauge starts to creep upward) I have to clean the screen in front of the radiator and clean all the air intakes into the engine compartment to prevent overheating.