I am trying to fix a problem in my bathroom: I have 3 handles - Hot, Middle and Cold, the Middle handle splits the water between my headshower and the spout (first image in the attachment). Recently I started experiencing an issue: the water partially comes from both places - the spout and the shower, I searched online and guessing that I need to fix my diverter (that Middle handle) I tried to disassemble it - found small bold like thing (blue arrow in second image) and unscrew it but still could not proceed further, I think I need to take the thing marked with green arrow from the thing marked with red arrow, I trout to pull it out but it didn't go, should I try harder? I am just afraid to break something, is that valid concern? How to better take pull it off and what to do next?
