Can't thank you enough for this. I had to really pound on the ring to get it to turn. Eventually I worked it off. Thanks again for putting this together to show how it's done.
Thank you for showing me this procedure. I picked up a nice solid-core door out of a Dumpster to use as the top of a very sturdy workbench I'm building. The door weighs 100 lbs. including the hardware, and after lugging it all the home I was dismayed by the apparent lack of screws for removing the lockset! I was seriously considering using a hack saw or a hammer.... Now, thanks to you, I have successfully taken it apart without causing any damage.
Thanks for the video! I've always been able to remove the trim ring by grabbing it and turning it counterclockwise to unscrew it, per Schlage installation instruction manual, but maybe there are different types. Also, there is a special plastic castle nut wrench tool that comes with a new Schlage commercial handle set for removing and installing the castle nut bushing. You can purchase the tool separately. Part number 40-017. I think someone also makes a steel one, which is nice if you are working on a lot of door handles like in an office building. Always start the castle nut by hand to avoid cross threading it. It should go on and come off with little effort. You can use a small Allen key to insert in the hole to remove the handles.
I really liked your video. The way you showed it step by step and explained it as you went along. So many how to video's just go through the steps without explanation. Yours was really nice.