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Campy Mirage Shifter Problem(10 posts)

Campy Mirage Shifter Problemgemcity
May 9, 2002 7:56 AM
The rear shifter on my wife's bike sometimes "locks-up" when shifting up from the smallest gear. When it happens you can push the lever a bit, but then it stops (the cable simply doesn't move). The cable/deraileur (sp?) seem to move freely when pulled by hand. Alternately, pushing the "downshift button" and the "upshift lever" eventually releases the mechanism (whatever that means).

(1) Anybody seen or heard of this happening with Campy Mirage (I have no experience with it, or other Campy)?
(2) Any suggestions on how to fix it?

re: Campy Mirage Shifter ProblemTJeanloz
May 9, 2002 8:09 AM
Take a look at the underside- this sounds like a little bit of cork handlebar tape may be jammed up in the mechanism; it happens from time to time with symptoms similar to those you describe.
re: Campy Mirage Shifter Problemgrandemamou
May 9, 2002 10:57 AM
May also be in need of lube. Pull the brake hood back and you should see a small lube port on top. It's a tiny hole. Try shooting some lube in there and moving the shifter back and forth. I sweat alot and periodicly have to spray lube into mine. The shift mechanism gets gunked up with salt and road grime and won't shift.
Thanks, but thats not it...gemcity
May 9, 2002 12:28 PM
I have sprayed lube in there. When it "locks-up" the problem is not friction. Something is really jammed-up in the mechanism. I have never seen anything like this (with Shimano; no experience with Campy). The bike is almost new (2001), so I doubt that gunk is the problem.

I wonder if it can be related to cable-tension and/or the low-stop, since it only happens going up from the smallest gear. What do you think?

Thanks anyway! I will lube it some more (just for fun).
Thanks, but thats not it...mackgoo
May 9, 2002 12:47 PM
did you check the cork?
Thanks, but thats not it...gemcity
May 9, 2002 12:56 PM
I'm gonna do that as soon as I get home.
re: Campy Mirage Shifter Problemcurlybike
May 9, 2002 7:18 PM
That is Ergo lockup and is caused by: accidently touching the button while trying to move the lever Or the button may not be resetting properly due to corrosion in the button pivot, there is a itty bitty spring that is supposed to return the pawl of the button away from the ratchet. Notice that the button on the other shifter moves slightly before it engages the pawl. The hood cover may be getting loose and binding the button return intermittently. The big button return spring may be distirted from age causing a problem. Most of the time it is operator error and the lever must be released and the button pushed, of course this does not help her since she is already on a hill, and would rather downshift to an easier gear.
It seems to just happen w/o touching the button...gemcity
May 10, 2002 2:56 PM
...after releasing ALL tension by pushing the button.

I pulled-up the hood (which does not seem to be binding it up). Seems like the button has not properly released the ratchet (gear).

I don't buy operator error. Happens to her a lot, and to me frequently when I test ride it. Components shouldn't just seize-up like that.

I'm stumped, and I'm getting ready to take it to the Campy-man at my LBS.

It seems to just happen w/o touching the button...curlybike
May 10, 2002 5:20 PM
Look under the button real close to the hood cover, you will see a shiny rivet. There is a pivot right there that has the itty bitty spring. That has to move freely.It also has to return from a light touch of the thumb. If it no wiggly easy, you have found the problem. Lube and wiggle until it frees up. If that is the case, you have a girlfriend that rides hard enuff to sweat, lucky you.
re: Campy Mirage Shifter ProblemSnowBlind
May 10, 2002 11:54 AM
Another possiblity is the "cable routing" spacer right behind the shifter shaft, between the shaft and the handlebar.
On the parts catalog 2002 EC-RE124 and EC-RE059 page 41.
On my Veloce shifters they tended to shift around a little and it would bind the cables when in the smaller cogs. Working the shifters a bit usually fixed the problem.
BTW are they really Campy cables? The problem went away with the replacement of the cables (due to wear).