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Tips for shifter cable installation/extraction?

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Tips for shifter cable installation/extraction?

Old 07-14-15, 11:27 AM
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Rockenreno
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Tips for shifter cable installation/extraction?

I run Dura Ace 9000 and recently had my rear shifter cable snap inside the shifter. I was able to extract it after some disassembly and insert a new shifter cable, but I am unable to shift using the new cable. I can move the paddle shifter (as if shifting into harder gears), but the feel is soft and there is no "click" feeling. I am unable to move the lever as if shifting into easier gears. This applies whether I connect or disconnect the cable from the rear derailleur.

After re-reading the shimano instructions, I realize that I likely had the shifter all the way in the easiest gear when I installed the cable instead of in the hardest gear (smallest cog). This would explain why I am unable to shift toward easier gears. I attempted to push the cable back out in order to reset it and shift into the appropriate gear (smallest cog) before setting the head/end of the cable in the shifter, but it does not appear to want to come out easily. I'm worried it could be jammed in there from my shift attempts.

Before I tear apart the shifter or take it to a shop I thought I'd see if anyone has any advice on how to proceed.

Thanks!
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Old 07-14-15, 12:45 PM
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FBinNY
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I'm not sure of the specific remedy for your current fix, except for some judicious massaging of the wire to try to work it out again. Make sure the cam is rotated to a position where there's clearance for the head to come out.

For the future, dip cable heads in grease before inserting so they're fully coated and not likely to get stuck because of corrosion.

Also, cables typically fray and break slowly in the area that winds on and off the lever drum. This is an unavoidable metal fatigue process, but you get some warning because the wire will work harden (stiffen) as it fatigues (bend a paper clip back and forth to experience this) and result is stiffer, harder shifting over the last days and weeks before breaking. WARNING - it's a slow process and easy to miss until near the end, so the moment shifting gets worse, check for fraying and try to replace before it breaks.
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Old 07-14-15, 08:21 PM
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Andrew R Stewart 
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+1. I'll add that the shifter's cable spool is plastic and can get indented a small bit by the cable end if the end isn't in it's seat but instead is riding on the outer surface of the spool. So manipulation of both the spool's rotational state as well as the cable being "pushed" into the shifter might be needed to free up the cable. Once free don't be surprised if the cable ends up needing replacement as it can kink from this miss positioning. Andy.
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