Posted by Me on 1/8/2025, 6:26 am, in reply to "Re: Tuba Rotors"
No. There’s probably an adjustment you can make on the back of the mechanisms - a threaded screw that if you detach from the valve makes the lever “longer” or “shorter” - start there.
You *never* need to fully disassemble a rotor valve to adjust it unless something has gone wrong with how it directs air.