Tom from SWISCO responded:
October 11, 2019
Hello! Spiral balances have a lifespan of about 15 years, so it sounds like yours are on their last leg. If they aren't totally worn out already then I don't expect they'll last much longer. The good news is, they're very easy to replace. In your case, you either have our S900-30 or S600-30, depending on the diameter of the tube. Look them over and see what you think. The video below may also be helpful for you. |