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Old 07-16-14, 09:31 PM   #1
wrenfisher
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Shimano ST-6800 lever not working

The left hand B lever (small lever to shift to small ring) all of a sudden quite working. It just moves freely without engaging. Stuck on large ring. Anyone familiar with this problem and how to fix it? Thanks.
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Old 07-16-14, 10:02 PM   #2
e_guevara
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Try to loosen the shifter clamp bolt a little underneath the rubber cover. It might be compressing the gear/ratchet mechanism preventing it from moving.
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Old 07-17-14, 04:36 PM   #3
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Thank you. Tried loosening the clamp bolt but still doesn't engage.
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Old 07-17-14, 05:09 PM   #4
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Flood the insides of both shifters with WD40. This will loosen the hardened factory grease.
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Old 07-17-14, 06:15 PM   #5
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Quote:
Originally Posted by Al1943 View Post
Flood the insides of both shifters with WD40. This will loosen the hardened factory grease.
While I'm a believer in using WD-40 for flushing out both road and mountain Shimano shifters that have the dreaded "dead shifter syndrome" caused by old grease, I wouldn't advise it with 6800 shifters. Couldn't be more than a couple of years old, it's a pretty new group. There's almost certainly something else going on here.
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Old 07-17-14, 07:35 PM   #6
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Push the big lever (shift up) gently and see if there is still movement in the shifter/FD. Then try pulling down on the derailleur cable (slowly - don't tug) on the downtube (left side of the bike going to the FD) towards the BB while pressing the inner lever. This should help move the gear mechanism inside the shifter.

If the lever doesn't release with this then I'm afraid the pawl release mechanism is busted.
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