Re: [CR] Campagnolo Friction Shifters

(Example: Framebuilders:Norman Taylor)

From: "Scott L. Minneman" <minneman@onomy.com>
To: 'Michael Howard' <95rivieramike@gmail.com>
References: <CLECKBFDEGDFDELFHKKJEEMFCKAA.ianstock@stocknet.ca> <4A8B0977.4030301@m-gineering.nl> <68924d350908181952k1f6f2168j419e3a6ad8bb81e1@mail.gmail.com>
In-Reply-To: <68924d350908181952k1f6f2168j419e3a6ad8bb81e1@mail.gmail.com>
Date: Wed, 19 Aug 2009 16:41:42 -0700
Thread-Index: AcogeD58fMzJqeLTSMizQLMD2u9xswArOt7Q
Cc: Classicrendezvous@bikelist.org
Subject: Re: [CR] Campagnolo Friction Shifters


I've had to do this once. Use a bottoming tap (or make a serviceable one by grinding down a regular tap (very slowly, or you'll ruin the hardness of the tool)). First, it'll deepen the threads in a useful way, and second, you'll greatly reduce your chances of popping the braze-on off of the frame.

A good hardware store will have them. Or buy one from a mail-order house like http://www.mcmaster.com. Or make one. Don't use a taper tap or a plug tap.

You can tell if this issue is the culprit by screwing the pivot screw in without the lever...you'll see/feel it tighten up too early to be properly applying the needed friction on the lever. After that test, go back to looking at the stack of shims and washers...there's probably something amiss. If not, use Locktite 222MS (the purple formulation).

Cheers,

Scott Minneman San Francisco, CA USA

-----Original Message----- From: classicrendezvous-bounces@bikelist.org [mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of Michael Howard Sent: Tuesday, August 18, 2009 7:53 PM To: M-gineering Cc: Classicrendezvous@bikelist.org Subject: Re: [CR] Campagnolo Friction Shifters

If you have the braze on studs on the frame I find many times the winged screw will bottom out and not tighten up enough. This is due to brazing material working its way in there or some flux or what not build up in there. You can try re-tapping the hole with a 5mm x0.8 tap but be careful not to go to far or it can actually act like a crank puller and yank the stud right off the frame. If that does not do it take the screw to a grinder and grind it down short enough to tighten up properly.

Mike Howard Santa Fe Springs CA

On Tue, Aug 18, 2009 at 1:05 PM, M-gineering <info@m-gineering.nl> wrote:
> Ian Stock wrote:
>
>> I have a circa 1978 Pinarello (Moser) with Super Record kit.
>>
>> The front shifter continually loosens up. I spend half my time cranking
>> the
>> butterfly tight.
>>
>> The LBS suggested Lock-Tite but I have to believe there is a more
>> "authentic"
>> fix.
>>
>> Any suggestions?
>>
>> Ian Stock
>> Toronto, ON
>>
>
> If correctly assembled, there should be a washer with internal flats
> engaged on the shifter boss, which prevents it from rotating. My guess is
> the whole stack is moving with the shifter, thus loosening the bolt
>
> --
> mvg
>
> Marten Gerritsen
> Kiel Windeweer
> Netherlands