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#1
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Front derailleur shifter problem
I have a Shimano XT shifter problem. The shifter is about 5 years old
and I have three chainrings. It works fine on the two smallest chainrings, but when I try and get into the largest chainring by pushing the lever there is NO resistance to my pushing and therefore no movement of the front derailleur. Where do I need to make adjustment? thanks for any help, rick |
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#2
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Front derailleur shifter problem
On 16 Jan 2006 16:20:05 -0800, "semidemiurge"
wrote: I have a Shimano XT shifter problem. The shifter is about 5 years old and I have three chainrings. It works fine on the two smallest chainrings, but when I try and get into the largest chainring by pushing the lever there is NO resistance to my pushing and therefore no movement of the front derailleur. Where do I need to make adjustment? thanks for any help, rick Is this a thumb lever, a rapidfire two-trigger setup, or what? The described symptom should not be possible with a regular lever-type shifter AFAIK. With a rapidfire, it might be hanging up internally and not allowing the pawl to engage to move the wheel around. -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#3
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Front derailleur shifter problem
Assuming this is a thumb shifter, I've seen this on many Shimano
shifters (although not on an XT). When you push with your thumb, there is a small pall (size of a thin pencil lead) that is spring-loaded inside. As you push, it folds into a slot and the spring pushes it back out when you get to the next gear. This is hard w/o a picture! Anyway, with age and dirt this pall gets gummed up and the spring can't push it back out. It therefore doesn't catch where it should and your second push (for the next gear) does nothing! You can open the shifter and squirt degreaser in there, and often get it to work again. In my experience, this period of working will be short! I'm hoping to acquire a ultrasonic cleaner soon, partly to see if this will fix these shifters. Unfortunately you are probably looking at replacing the shifter soon. Pete |
#4
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Front derailleur shifter problem
Yes it is a thumb-type shifter. I will take it apart tomorrow and have
a look-see. I will clean out the area around the pall. Question: why do you think and ultrasonic cleaner would work better than a thorough manual cleaning? This seems to imply that you are unable to get it cleaned thoroughly manually? I'll report back what I find. rick |
#5
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Front derailleur shifter problem
Yes it is a thumb-type shifter. I will take it apart tomorrow and have
a look-see. I will clean out the area around the pall. Question: why do you think and ultrasonic cleaner would work better than a thorough manual cleaning? This seems to imply that you are unable to get it cleaned thoroughly manually? I'll report back what I find. rick Don't do it!!! (Take it apart, that is). Try flushing the lever with PowerLube (available at finer auto parts stores everywhere). It does absolute miracles with old shift levers that no longer "catch." All you need to do is remove the little cap that you'd use to replace a cable and spray quite a bit in there, work the shifter a bit, and if it doesn't start working, come back to it in 10 minutes... and it just might. It's worth a shot. --Mike-- Chain Reaction Bicycles www.ChainReactionBicycles.com |
#6
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Front derailleur shifter problem
The Power Lube did the trick. I hope it continues to do so. I will
report back if it sticks again. I was unable to shift to the large chainring on the return 25 miles of Sunday's ride and it was sorely missed=) thanks for everyone's help, rick |
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