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Removing downtube cable stops from a vintage steel frame

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Removing downtube cable stops from a vintage steel frame

Old 10-29-14, 03:20 AM
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Barchettaman
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Removing downtube cable stops from a vintage steel frame

Morning all,
Do any of you have any tips or tricks for removing aluminium DT cable stops from a steel frame?
The bike is a 1991 Koga Miyata Runner, and I am looking to remove the stops for another project and return the Koga to DT shifters.
The 3mm Allen bolts came out OK but the alu bosses are tight on there & won't move. I imagine the alu has corroded onto the steel shifter boss.
I tried VERY GENTLY getting a screwdriver in between boss and frame but succeeded only in starting to crack the paint (and want to avoid denting the tube!)



So, if anyone has a magic trick to remove these, I'm all ears.

Thanks in advance! Simon

Last edited by Barchettaman; 10-29-14 at 08:51 AM.
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Old 10-29-14, 04:30 AM
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Hi,

I'd try gentle heat - not a heat *** as that might damage the paint- I have had some success using just boiling water. It might provide enough of a shock to free it off if some penetrating oil is used first


Edit a short word for firearm is blanked!! Will I be on some CIA list? .
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Old 10-29-14, 04:41 AM
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Be aware of the possibility that the stops were glued as well as screwed to the tube.
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Old 10-29-14, 06:01 AM
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If you don't mind marring the stops, grasp them with pliers or Visegrips and wiggle them off.

And yes, the censorship on this forum is absurdly PC.
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Old 10-29-14, 06:07 AM
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Thanks all. I will try those suggestions.
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Old 10-29-14, 07:52 AM
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If the low heat and/or wiggle method fails then just grind off the stops. Using a Dremel or bigger 1/4" die grinder and a stone made for AL. With some care only the stop will be touched until you get down to the tube. A small file and sand paper to finish with should leave a smooth surface for the touch up.

But a question. I don't think I've seen AL stops on a steel frame, certainly not on a "vintage" frame (whatever vintage means anymore). Are you sure they're AL? Andy.
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Old 10-29-14, 08:04 AM
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Please, mods - I see no possible reason for banning the three letter word for firearm when it is used as part of the name for some tools. Anyone who wishes to threaten or promote violence can do so with a host of permissible words. I very much doubt such a person would even need to use the aforementioned word, whereas we can't use it with heat or grease.
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Old 10-29-14, 08:05 AM
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Originally Posted by HillRider View Post
And yes, the censorship on this forum is absurdly PC.
+1 Please, mods - I see no possible reason for banning the three letter word for firearm when it is used as part of the name for some tools. Anyone who wishes to threaten or promote violence can do so with a host of permissible words. I very much doubt such a person would even need to use the aforementioned word, whereas we can't use it with heat or grease.
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There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
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Old 10-29-14, 08:30 AM
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Originally Posted by Andrew R Stewart View Post

But a question. I don't think I've seen AL stops on a steel frame, certainly not on a "vintage" frame (whatever vintage means anymore). Are you sure they're AL? Andy.
I believe the OP is refering to the Shimano (or other) adapters which are attached to a braze-on downtube shifter boss. I've seen these get frozen on over time, and if I can't pop them off, I slot them with a saw or Dremel, then insert a screwdriver and twist to spread them slightly.
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Old 10-29-14, 08:36 AM
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Yes and yes. The dt stops are a later addition as the Runner originally came with standard DT shifters.
I managed to unfreeze the barrel adjusters so at least they are perfectly servicable. Looks like the frame will be getting thumb shifters or STIs!

once again, thanks all for the advice. Great forum, this.
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Old 10-29-14, 08:37 AM
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Use heatgun as all 1 word.

Originally Posted by chewa View Post
Hi,

I'd try gentle heat - not a heat *** as that might damage the paint- I have had some success using just boiling water. It might provide enough of a shock to free it off if some penetrating oil is used first


Edit a short word for firearm is blanked!! Will I be on some CIA list? .
Originally Posted by HillRider View Post

And yes, the censorship on this forum is absurdly PC.
Originally Posted by cny-bikeman View Post
Please, mods - I see no possible reason for banning the three letter word for firearm when it is used as part of the name for some tools. Anyone who wishes to threaten or promote violence can do so with a host of permissible words. I very much doubt such a person would even need to use the aforementioned word, whereas we can't use it with heat or grease.
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Old 10-29-14, 08:40 AM
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And because threads are useless without pics, here is a photo of a similar Runner.

nice tubeset, proprietary Miyata triple-butted FM-1 Hardlite Cro-Mo, and the frameset is dent free if a tad rusty in places.

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