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Shimano 600 right STI lever service need

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Shimano 600 right STI lever service need

Old 11-05-10, 08:09 AM
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Midwest Ullrich
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Shimano 600 right STI lever service need

Bought this excellent condition Cannondale R300 from a local scrap metal collector for less than $50. The bike has full Shimano 600 STI group but without the wheels. Originally I thought I got a screaming deal. Then when I got it home and had the wheels put on for test ride, I found out the right STI lever is not working. Basically the shift does not stay.

Given the lever is cosmetically flawless, I really wanted to fix it up and get it working again. My questions are:
- what are the typical failures of Shimano STI levers? Spring dislodged or snapped or else?
- where can I download the schematic of the lever shift mechanism?
- are replacement parts available for purchase? if yes, where?
- any trust-worthy repair shop well-known for fixing this problem?

I also have a pair of bar end shifters. Worse case for me would be to use the STI lever as a brake lever and shift with the bar end shifter. I need it to ride up Mt Diablo (CA), so I need multiple speed.

Any help is appreicated.

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Old 11-05-10, 08:17 AM
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Spray into the mechanism as best you can with an aggressive aerosol degreaser. Use a lot of it. If you're lucky, shifting will resume as the grease Shimano uses in there dissolves from a gunked up state it acquires with age. If that doesn't work, go with your bar end shifter -- Shimano STI internals are largely unserviceable.
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Old 11-05-10, 09:31 AM
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Yeah, shoot it full of WD 40.
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Old 11-06-10, 09:15 AM
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Midwest Ullrich: This guy claims to be able to fix STI shifters; I haven't used his services, just passing the information along. He doesn't seem to approve of the WD-40 approach.
https://www.facebook.com/group.php?gid=100856572916
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Old 11-06-10, 09:51 AM
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typical failure? plain worn out
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Old 11-06-10, 12:59 PM
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Also as a warning, those front shift housings exiting the STI's seem to be extremely short.
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Old 11-06-10, 07:06 PM
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Originally Posted by operator
Also as a warning, those front shift housings exiting the STI's seem to be extremely short.
That's a good point. But it's hard to tell from the photo.
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Old 11-06-10, 09:38 PM
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Originally Posted by Al1943
That's a good point. But it's hard to tell from the photo.
Yeah, the stem seems to be non original, and long.
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Old 11-06-10, 09:46 PM
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Thanks for the help. WD-40 works! I had to soak it for several hours before it takes into effect.
Before the WD-40 solution, I tried to disassemble the thing but after seeing its construction (by removing the hood), I gave up.
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Old 11-07-10, 01:12 AM
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Does that mean you have got it working?
Give it an extra shot of WD 40. You really want to flush out any old grease and dust that you loosened up.
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Old 11-07-10, 04:59 PM
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After the WD-40 dries out trying dripping a good quality oil into the mech. and working it and wiping off the excess.
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