Alivio shifter "slips" through
I have 2002 Specialized Hardrock Comp with Shimano Alivio components. I noticed that my front shifter (the one that you press to go to the next bigger chain ring in the front) occasionally slips through when I press it. I have to slightly press the shifter upwards as if it needs to make contact with something inside before it "grabs" the wire again and shifts up. I checked if anything was simply lose on the shifter, but I could not find anything. Adjusting the little wheel on the cable housing of the shifter does not seem to make a difference as far as the "slipping" is concerned. This happens mostly when shifting from the middle chainring to the big one.
Any ideas? I am aware that the Alivios are not the best parts in the world but since the bike did hardly get any use and is in as-new condition I would think that this is not the result from overuse, damage from falls etc.
I checked the Shimano web page but that did not help.
These shifters can get gummed up with dirt and soot and such so that the pawls don't engage and the shifting no longer works correctly. You can clean them out by spraying degreaser, WD40, or something similar into the shifter body while moving the lever through the gears. Hopefully if you can clear out the gunk the shifting will work again.
Yep. My old LX shifter acts the same way. Stick the WD40 straw in the cable hole and give it a good flush. Good as new (as least for a few months)
Originally Posted by stausty