Michael, I don't think that carbopaste, valve grinding compound, red locktite, or crest toothpaste will matter here.
The design of this thing is such that when the QR is fully closed, it is over center in such a way that tension from the brake cable cannot cause it to open. If it's all assembled correctly, then the only possible answer is that for some reason, you're not closing the QR fully. Dirt or wear could be the culprit, or there's something else that we don't know about.
Never seen a Campy QR open under braking. Suggest you disassemble, clean and re-grease, and re-assemble correctly.
Mark Petry
Bainbridge Island, WA
From: michael haddad [mailto:haddawad399@hotmail.com] Sent: Sunday, November 22, 2009 6:51 PM To: classicrendezvous@bikelist.org Cc: mark@petry.org Subject: Strange behavior of NR brake quick release? More pieces of the puzzle
Mark Petry had some questions. Here are the answers:
1- Does the QR feel smooth as it takes up the slack ? Yes. Although there is more friction in the rear one as compared to the front one. 2- Is the 7mm nut tight? Absolutely 3- Is it possible that the QR was re-assembled incorrectly, for example, the cable fixing bolt is on the inside, not the outside? No. It is assembled correctly.
Mark's suggestion to dis-assemble and re-grease eveything made me think that grease might not be the way to go. I did dis-assemble, but did not re-grease to see if I could increase the friction and solve the problem. Thre result is that the front QR still has less friction than the front.
What do you think of using carbopaste or some other form of friction-increasing compound?
Thanks, Michael
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