Down Tube Cable Stop bracket came loose on carbon fiber frame....
I am in much need of some technical advice as I have at long last solved my shifting dillemma which has left me with another issue to resolve.
Please see pics of the downtube of my 2006 Look 555 frameset just aft of the head tube. Notice the bracket that secures both derailleur cable stops to the underside of the downtube has come loose. The glue bond with the carbon fiber down tube is broken and the cable stop bracket is gapping and rotating depending on what chain ring I am on in front due to change in cable tension from the front derailleur.
The metal rivet shown is still in place and the only thing keeping the cable stop bracket attached to the down tube albeit not securely enough for position shifting.
Therefore I need some repair advice from those with experience...maybe some have even performed this repair on a carbon fiber frame.
A couple of ways to proceed:
Quick and dirty...would be to wick some lower viscosity super glue into the void between bracket and downtube afforded by the slightly elongated rivet and then clamp the bracket down to the downtube until glue has dried...I could fashion a simple clamping fixture until the glue sets. Problem with this approach is good or probably uneven glue penetration however
The best approach may be to drill out the metal rivet. Removed the bracket and apply glue to both the underside of the bracket and the interfacing bottom down tube surface and again clamp until dry. Then install a new rivet for further security.
My quesitons are...which approach or perhaps another would you suggest?
What kind of glue do you suggest?...epoxy?...super glue?....Gorilla glue gel?
If I install a new rivet, how do I figure out the proper replacement rivet length/clamping zone?
Any tricks for drilling out the rivet without having the rivet shank rotate while drilling since I can not retrain it from inside the tube?
Thanks for any advice you could provide. I am a DIY'er by nature and would like to avoid shipping the frame off to a builder or back to Look for repair if possible.
I appreciate your help.
Last edited by Campag4life; 03-06-11 at 01:11 PM.