Tom from SWISCO responded:
August 17, 2021
Hello! Your operators are an older style but we can absolutely supply replacements. See our 39-013 and 39-014 to start out. I think these are what you want but you should check our dimensions just to be 100% sure, especially the arm length. We also sell the 39-114L handle if you are unable to reuse your original. As for adjustment, I don't think there's any you can make to your operators. Based on your description of the issue it sounds like your gears are stripped out, so replacement is your best bet. Additional information for 39-013
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