The "low" screw on my front derailer won't stay put, so as I ride around it'll vibrate halfway out and the chain tends to fall off when I downshift. It's an old suntour derailer, metal screws into metal link, no plastic bits to hold 'em still. Both screws shake around freely, but only the low one tends to move around. Is there a quick fix to make the screw stay put? I was thinking a little blob of gasket-in-a-tube by the base of the screw might hold it in adjustment. No room for a jam nut.
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The "low" screw on my front derailer won't stay put, so as I ride around it'll vibrate halfway out and the chain tends to fall off when I downshift. It's an old suntour derailer, metal screws into metal link, no plastic bits to hold 'em still. Both screws shake around freely, but only the low one tends to move around. Is there a quick fix to make the screw stay put? I was thinking a little blob of gasket-in-a-tube by the base of the screw might hold it in adjustment. No room for a jam nut.
"Blue Loctite" is designed to keep fasteners from vibrating loose while not locking them permanantly. If Loctite is not available in your part of the world, maybe a similar substance is.
Hi, I think many Derailleur screws will exhibit this. I noticed this even on new Campy Derailleurs (Veloce), where the screws seem awful loose. Not as precise, and tight as they could be.
I've used an ultra heavy grade of Damping Grease on screw threads with good results, But perhaps the application of a Med Strength Threadlocker on each screw will suffice just as well. I would remove the offending screws, degrease both screws, and bores, coat with threadlocker, let sit overnight, then re-install the screws in thier respective bores. Hope this helps. Mark
Yes, I had the same problem with a record FD. I used blue locktight to solve the problem.
Gary Jacobson Rosendale, NY
"Mark" <[email hidden]> wrote in message news:[email hidden]...
Quoted message said:
Hi, I think many Derailleur screws will exhibit this. I noticed this even on new Campy Derailleurs (Veloce), where the screws seem awful loose. Not as precise, and tight as they could be.
I've used an ultra heavy grade of Damping Grease on screw threads with good results, But perhaps the application of a Med Strength Threadlocker on each screw will suffice just as well. I would remove the offending screws, degrease both screws, and bores, coat with threadlocker, let sit overnight, then re-install the screws in thier respective bores. Hope this helps. Mark
