[CR]Re: retrofriction shifter installation


Example: Framebuilding:Brazing Technique
Date: Mon, 4 Feb 2002 09:14:06 -0800 (PST)
From: "Tom Dalton" <tom_s_dalton@yahoo.com>
To: Lee Berg <lberg@ventoux.com>
Cc: classicrendezvous@bikelist.org
In-Reply-To: <3C5EBF18.FF33BD8E@ventoux.com>
Subject: [CR]Re: retrofriction shifter installation

This is the illustration I referred to as erroneous. Seeing it again, after all these years, I now remember now that it is more vague than incorrect. Looking at it you would think the cupped washers nest together like spoons in a drawer. They really should be arranged so that the concave faces of are facing eachother. What you end up with is something that is linticular in profile, that is, it looks like a lens from the side. This squishy little package ends up working as a spring to keep tension along the shifter's axis.

Tom Dalton


--- Lee Berg wrote:


> Hi, Tom,

\r?\n>

\r?\n> Which direction do the concave sides of the cup

\r?\n> washers face (away or

\r?\n> toward the frame)? Is this illustration correct?:

\r?\n>

\r?\n> http://www.ventoux.com/retrofric.jpg

\r?\n>

\r?\n> Lee Berg

\r?\n> Palo Alto

\r?\n>

\r?\n>

\r?\n> Tom Dalton wrote:

\r?\n> >

\r?\n> > > Also Campy C retro friction shifters.

\r?\n> > > I can use some help in installing these

\r?\n> correctly.

\r?\n> > > They have a number of washers and bushings on

\r?\n> ea.

\r?\n> > > side. and I don't have the instruction sheet.

\r?\n> > > Thanks

\r?\n> >

\r?\n> > C-rec shifter install sequence:

\r?\n> >

\r?\n> > 1) aluminum stop plate

\r?\n> > 2) large bronze washer

\r?\n> > 3) shifter

\r?\n> > 4) set the small bronze washer on the notched

\r?\n> > stainless bushing and insert bushing to engage

\r?\n> flats

\r?\n> > of boss

\r?\n> > 5) pair of stainless cup washers w/ concave faces

\r?\n> > together (some shifter sets had two thin and two

\r?\n> > thick. In this case use one thin and one thick

\r?\n> per

\r?\n> > side) NB: early directions had an erroneous

\r?\n> > illustration showing spring washers in wrong

\r?\n> > orientation.

\r?\n> > 6) outer dust shield

\r?\n> > 7) thumb screw.

\r?\n> >

\r?\n> > NOTES: a)be sure bosses are tapped deep, ideally

\r?\n> w/ a

\r?\n> > bottoming m5 tap b) assemble w/ heavy oil like

\r?\n> Campy

\r?\n> > or Phil wood. c) Shiter should pull back very

\r?\n> easily

\r?\n> > but move forward w/ much more effort. But you

\r?\n> know

\r?\n> > that.

\r?\n> >

\r?\n> > Tom Dalton

\r?\n> > Lehigh Valley, PA