slipping Silver shifter

[mho]

I have the downtube Silver shifter. The shifter that controls the
front derailleur slips ever so slightly every 3 minutes or so. I
don't get ghost shifts, but I do get annoying chain rub on the front
derailleur cage.
Trimming it every 3 minutes is annoying. Any tips on preventing the
slip?

[dougP]

Sounds like a lack of friction. Try adding a star lock washer to the
stack'o'stuff under the D-ring, and/or a "wobble washer". There is
probably a more correct term for these but they are washers that are
formed as a continuous spring, not flat but out of plane.

dougP

[Ginz]

Also, try beeswax on the threads of the adjustment bolt.

[Horace]

I had this problem with the silver shifter on the downtube, no matter
how much I tightened it.

I finally traced the problem to the fact that the square-hole washer
that sits on the frame was slightly too thick for my shifter boss. I
sanded it down a little bit with a Dremel tool, and that solved the
problem.

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[William]

The Suntour Sprint, which the Silvers copied, came in the box with two different thicknesses of flat washer that slides onto the boss right BEFORE you slip the shifter onto the boss.  There's a 'standard' thickness one, and an extra one that is slightly thicker.  Some bosses are a hair longer, so the stack up of the shifter assembly is a hair too short, even when tightened completely.  The slightly thicker washer corrects that.  

The Silvers I assume do not come with a choice of base flat washer, so you'll need to replace it or augment it.  I'd pull off one shifter, get that base flat washer, and find a replacement at the hardware store that matches the inside diameter and the outside diameter and is EITHER a little thicker (a couple tenths of a mm will be fine) or is very very thin.  If you find thicker ones, replace.  If you find very thin ones, add them in.  

[Brian Hanson]

I had the same problem.  After trying two sets of Silver shifters on both bar ends and down tube mounts.  I finally replaced my modernish DuraAce front (7800) road triple derailleur with an older XT circa 1989ish.  Fixed the slipping problem, and the shifter is smooth and light.  Big difference.  My observation is that the modern derailleur has a heavier spring and pulls the shifter more.  Tightening it down hard doesn't work.  

What modern front derailleurs have a moderate spring tension/leverage?  

Brian

Seattle

On Wed, Sep 7, 2011 at 2:05 PM, mho <mho...@gmail.com> wrote:

[grant]

In the dark agest, sometimes on bikes with DT shifter bosses, the
brass from brazing gets sucked up into the hole for the boss, making
it impossible to tighten ANY wing-bolt. In the olde dayes, you'd just
cut off some of the wing bolt, so it wouldn't bottom out. There's
nothing peculiar about the Silver shifters that makes 'em prone to
loosening when all's well in the boss area and the mounting. Nothing I
know of, anyway..

[mho]

Thanks to all for the tips. I will make an attempt this weekend.

[Rex Kerr]

Whoa...  After hearing all of the praise heaped upon the Silvers I thought I was the only one suffering this problem.  Seeing the response here makes me feel less alone.  I've been having severe difficulty shifting the rear of my AHH since day one (and I've been doing friction, and only friction, for years)... I was going to stop in at Riv to ask them to look at the shifter (since I've basically swapped every other part with my other bikes trying to find the source of my problem), but they were closed the Saturday that I was in the area for the Labor day holiday.  I'm even more convinced now that I just ended up with a bad shifter.  :-(

On Wed, Sep 7, 2011 at 2:05 PM, mho <mho...@gmail.com> wrote:

[Brian Hanson]

There is a "good" way to set up the Silvers - beeswax on the screw threads - only put grease on the inner silver washer - not the threads or anything else - scuff up the plastic washer a bit for some friction.  I still feel that the derailleurs make a BIG difference.  The ones I have tried with lower spring tension seem to work really well with friction shifters.  My newer model "road" derailleurs have never worked too well. 

YMMV

Brian