[Hammarlund] Slipping SP-600 Dial

[Joe Connor]

I need some advice on how to fix a slipping dial on an SP-600.
>
>So far, I cleaned the two rollers with rubbing alcohol. I removed the tension S-spring and tried to stretch it out a little. Nothing has worked. 
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>Does anyone have any solution for this problem? I can't see any way to tighten or move the rollers.
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>As always, thank you for your help.
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>   
>                        Joe Connor