And once again a tricky question for me. How do I get the drum brakes off at the back. I think that they are a little bit polished…. New drums are there, remaining interiors (brake pads, springs, brake cylinders too) Now the new drum on the inside has a half-round groove, of which I have no idea for what it should be or is. Hangs there a spring or any ring ? Or is the reason why I can not pull the drum off easily from the hub If yes, how can I solve the problem? Perhaps the brake cylinders are too wide open, so that the brake runs a bit “blocked” wheel! How can I solve that before I take the flex and just flex the drum apart…. Or should I do exactly that? Partial segment away flex brake cylinders then push in by hand, take down drum (and dispose), in life renew and push new drum on it. (unfortunately no idea with how much N/m. Let’s go to the brake dynamometer and check everything again…. Would be nice if someone could help me there And I say thank you