Yes, the large ring is a very fine-threaded nut and can be very difficult to remove and reinstall, or sometimes it goes just fine. Removing it will let the polycarbonate bowl drop off and the pleated cartridge filter slips down off the pipe it's on. You'll see the large "O" ring come down with the bowl too. Do not clean the bowl with carb spray or similar as it will cloud the bowl permanently (guess how I know ), just rinse with clean diesel and wipe with a clean rag. push the new cartridge up on the pipe and reinstall the bowl, "O" ring and nut being very careful not to cross-thread that nut - the last one I bought was $18 plus shipping !!! I've never had to bleed anything when just changing this filter on my 4110, mine always started and just self-bled. My tractor has the shutoff valve right on the filter housing, no other shutoffs on the whole tractor.