screw thread issue
Posted: Tue Aug 31, 2021 7:36 pm
I have a Yamaha YEB321s Eb bass with a strange issue with the screw threads on the top of the 2nd valve casing. After a good wash (no specific cleaning to these screw threads) I noticed - when screwing the second valve back in - that it got to a point where the screw was extremely tight and difficult to turn, but after a few rotations began to smoothly twist the rest of the way to the bottom. The issue is with the casing itself, not the cap, as I have tried all the caps with it. I have also noticed that spit is leaking mostly through this valve and out the bottom now, which it hardly used to do before the cleaning. This is probably just a case of someone (probably me) damaging the threads after trying a bit too violently to unscrew a stuck valve cap, but I thought I would just put this out there to see if anyone had any other nuanced suggestions as too what could have caused this.