nsixer
Guest
Your fan creates the pressure in the cab so even if you had a leak in the cab, dirt wouldn't or shouldn't be sucked in. Our 8820 would pull dust through the filter when it needed changing. I ran a 2188 that was the same way especially in bean dust. We blew the filters every couple days - it was better. My guess is your seal around the filter may be at fault. Otherwise you have a hole in the filter or in the intake for the fan that bypasses the filter that the fan can suck dirt through.