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Main
Date: 27 Jun 2007 17:55:57
From: sanchopanza
Subject: Older Shimano shifter question
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I've got a '91 Bridgestone MB2 that I'm working on. It has the
original Deore SIS top-mount shifters (the ones that have the round
body and a thumb lever). I want to take them apart and give them a
good cleaning, but I'm afraid I might break them. There is no visible
screw to allow for disassembly. There is a plastic ring that I could
probably pry off with a small screwdriver, but I'm afraid of ruining
them. Can these things be taken apart for cleaning? How?
Thanks,
John
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Date: 27 Jun 2007 23:10:55
From: A Muzi
Subject: Re: Older Shimano shifter question
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sanchopanza wrote:
> I've got a '91 Bridgestone MB2 that I'm working on. It has the
> original Deore SIS top-mount shifters (the ones that have the round
> body and a thumb lever). I want to take them apart and give them a
> good cleaning, but I'm afraid I might break them. There is no visible
> screw to allow for disassembly. There is a plastic ring that I could
> probably pry off with a small screwdriver, but I'm afraid of ruining
> them. Can these things be taken apart for cleaning? How?
> Thanks,
> John
>
Yes the cover pops off some Shimano top series. Use contact cement
(tubular glue) to replace it. Don't go farther - flush under that top
cover as you would an STi lever's guts.
Before prying, look underneath. A teeny screw there indicates a screw-on
top cover.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
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Date: 27 Jun 2007 17:24:59
From: Nate Knutson
Subject: Re: Older Shimano shifter question
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On Jun 27, 12:00 pm, sanchopanza <john.lem...@gmail.com > wrote:
> On Jun 27, 1:11 pm, landotter <landot...@gmail.com> wrote:
>
>
>
> > On Jun 27, 12:55 pm, sanchopanza <john.lem...@gmail.com> wrote:
>
> > > I've got a '91 Bridgestone MB2 that I'm working on. It has the
> > > original Deore SIS top-mount shifters (the ones that have the round
> > > body and a thumb lever). I want to take them apart and give them a
> > > good cleaning, but I'm afraid I might break them. There is no visible
> > > screw to allow for disassembly. There is a plastic ring that I could
> > > probably pry off with a small screwdriver, but I'm afraid of ruining
> > > them. Can these things be taken apart for cleaning? How?
>
> > It's been so long I forgot how. I've had one apart before...around '91
> > or so. Isn't there a screw underneath the body? Last thumbies I messed
> > with a couple years ago, some Deore 6 speed models, only required a
> > flush of penetrating lube to feel good as new. Last year I overhauled
> > a 7spd rapidfire setup--and those weren't flushable--and were indeed
> > perilous to disassemble. Spritz before prying, those old thumbies are
> > too nice to ruin.
>
> I think I will just try to get some lube inside the body. I'd hate to
> ruin them, especially since there aren't many nice 7-speed top-mount
> shifters around for a replacement.
>
> There is a bottom screw, but that removes the body of the shifter off
> the platform that is mounted on the bar. As far as I can tell it is
> only for cable removal.
>
> Thanks,
> John
I'm not positive but I think removing the main body of the shifter
from it's bracket like this will expose another screw or nut on the
underside of the body. I've also wondered for a long time about how to
service these, though.
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Date: 27 Jun 2007 14:24:41
From: Joe Bernard
Subject: Re: Older Shimano shifter question
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On Jun 27, 10:55 am, sanchopanza <john.lem...@gmail.com > wrote:
> I've got a '91 Bridgestone MB2 that I'm working on. It has the
> original Deore SIS top-mount shifters (the ones that have the round
> body and a thumb lever). I want to take them apart and give them a
> good cleaning, but I'm afraid I might break them. There is no visible
> screw to allow for disassembly. There is a plastic ring that I could
> probably pry off with a small screwdriver, but I'm afraid of ruining
> them. Can these things be taken apart for cleaning? How?
> Thanks,
> John
When you take a down-tube or bar-end shifter off its mount, it kind of
falls apart if you don't hold it together. I would try this with your
thumbshifter if squirting doesn't do the trick.
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Date: 27 Jun 2007 19:00:49
From: sanchopanza
Subject: Re: Older Shimano shifter question
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On Jun 27, 1:11 pm, landotter <landot...@gmail.com > wrote:
> On Jun 27, 12:55 pm, sanchopanza <john.lem...@gmail.com> wrote:
>
> > I've got a '91 Bridgestone MB2 that I'm working on. It has the
> > original Deore SIS top-mount shifters (the ones that have the round
> > body and a thumb lever). I want to take them apart and give them a
> > good cleaning, but I'm afraid I might break them. There is no visible
> > screw to allow for disassembly. There is a plastic ring that I could
> > probably pry off with a small screwdriver, but I'm afraid of ruining
> > them. Can these things be taken apart for cleaning? How?
>
> It's been so long I forgot how. I've had one apart before...around '91
> or so. Isn't there a screw underneath the body? Last thumbies I messed
> with a couple years ago, some Deore 6 speed models, only required a
> flush of penetrating lube to feel good as new. Last year I overhauled
> a 7spd rapidfire setup--and those weren't flushable--and were indeed
> perilous to disassemble. Spritz before prying, those old thumbies are
> too nice to ruin.
I think I will just try to get some lube inside the body. I'd hate to
ruin them, especially since there aren't many nice 7-speed top-mount
shifters around for a replacement.
There is a bottom screw, but that removes the body of the shifter off
the platform that is mounted on the bar. As far as I can tell it is
only for cable removal.
Thanks,
John
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Date: 27 Jun 2007 18:11:37
From: landotter
Subject: Re: Older Shimano shifter question
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On Jun 27, 12:55 pm, sanchopanza <john.lem...@gmail.com > wrote:
> I've got a '91 Bridgestone MB2 that I'm working on. It has the
> original Deore SIS top-mount shifters (the ones that have the round
> body and a thumb lever). I want to take them apart and give them a
> good cleaning, but I'm afraid I might break them. There is no visible
> screw to allow for disassembly. There is a plastic ring that I could
> probably pry off with a small screwdriver, but I'm afraid of ruining
> them. Can these things be taken apart for cleaning? How?
It's been so long I forgot how. I've had one apart before...around '91
or so. Isn't there a screw underneath the body? Last thumbies I messed
with a couple years ago, some Deore 6 speed models, only required a
flush of penetrating lube to feel good as new. Last year I overhauled
a 7spd rapidfire setup--and those weren't flushable--and were indeed
perilous to disassemble. Spritz before prying, those old thumbies are
too nice to ruin.
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