Cab filter upgrade: Safe(r) under pressure
ractor and sprayer cabs have long since used seals, filters and fan(s) to lift cabin pressure over that of outside air. The notion is that dust can’t easily get in, so the operator breathes clearer air. It works; at least until seals age and/or maintenance standards drop. Yet even most factory-fresh conventional systems have limits. Their relatively simple intake filters can’t handle very
