Trigger (un-)Happy

[Martin Bulmer]

The return spring in my Shimano Altus ST-CT90 gear changer has ceased to function. This means that
although I get a clean change, the trigger does not return to firing position unless I pull it back.
This prevents those rapid-fire up-changes encountered at the tops of hills. The chain ring changer
went like this some time ago, but that hasn't really bothered me. I've taken it apart a bit, and the
springs which hold the ratchet lever in the cogs are both ok, but I can't see a broken spring, or
figure out where a return spring would have been attached. I'm assuming there's only one return
spring, as the returnability of both change-up and change-down levers failed at the same time. Does
anyone know a web-site with diagrams, or is this not a DIY repair? (I know someone's going to say
"scrap it and get a better set", but just for now, let's take that as read, I ain't made of money.)

--

Martin Bulmer "Mixless Foot Persuasion"

[Chris French]

In message <bh98qg$kjh$2@newsg1.svr.pol.co.uk>, Martin Bulmer
<martin@bulmers4.freeserve.co.uk> writes
>The return spring in my Shimano Altus ST-CT90 gear changer has ceased to function.
<snip>
>. Does anyone know a web-site with diagrams, or is this not a DIY repair? (I know someone's going
> to say "scrap it and get a better set", but just for now, let's take that as read, I ain't made
> of money.)
>
There are exploded view diagram pdf's on the Shimano website for lots of things (though maybe only
current products for all I know) - search for the particular product and it will list them if
available.

However I doubt if you will get any spare parts needed to repair the levers
--
Chris French, Leeds

[James Hodson]

On Tue, 12 Aug 2003 00:25:45 +0100, "Martin Bulmer" <martin@bulmers4.freeserve.co.uk> wrote:

>The return spring in my Shimano Altus ST-CT90 gear changer has ceased to function
>
[SNIP]

Martin

Are you sure it's not just the gear cable that's sticking?

James

PS OTOH, my own gear cable may well be OK and the problem on my bike is down to the shifter :-/

--
http://homepage.ntlworld.com/c.butty/Larrau.jpg

[Martin Bulmer]

James Hodson wrote:
> On Tue, 12 Aug 2003 00:25:45 +0100, "Martin Bulmer" <martin@bulmers4.freeserve.co.uk> wrote:
>
>> The return spring in my Shimano Altus ST-CT90 gear changer has ceased to function
>>
> [SNIP]
>
> Martin
>
> Are you sure it's not just the gear cable that's sticking?
>
> James
>
> PS OTOH, my own gear cable may well be OK and the problem on my bike is down to the shifter :-/

Thanks for that thought, but no, it's not the cable.

--

Martin Bulmer "Mixless Foot Persuasion"

[Martin Bulmer]

James Hodson wrote:
> On Tue, 12 Aug 2003 00:25:45 +0100, "Martin Bulmer" <martin@bulmers4.freeserve.co.uk> wrote:
>
>> The return spring in my Shimano Altus ST-CT90 gear changer has ceased to function
>>
> [SNIP]
>
> Martin
>
> Are you sure it's not just the gear cable that's sticking?
>
> James
>
> PS OTOH, my own gear cable may well be OK and the problem on my bike is down to the shifter :-/

Thanks for that thought, but no, it's not the cable.

--

Martin Bulmer "Mixless Foot Persuasion"

[mtnman]

Originally posted by Martin Bulmer
James Hodson wrote:
> On Tue, 12 Aug 2003 00:25:45 +0100, "Martin Bulmer" <martin@bulmers4.freeserve.co.uk> wrote:
>
>> The return spring in my Shimano Altus ST-CT90 gear changer has ceased to function
>>
> [SNIP]
>
> Martin
>
> Are you sure it's not just the gear cable that's sticking?
>
> James
>
> PS OTOH, my own gear cable may well be OK and the problem on my bike is down to the shifter :-/

Thanks for that thought, but no, it's not the cable.

--

Martin Bulmer "Mixless Foot Persuasion"

Hey, Trigger (un) happy!

I've got the same exact problem with same exact shifter, it's basically a piece of sh!t. Did you ever find a solution or a replacement part? I noticed the shifter pod can come off, so I'm assuming that may possibly be replaced instead of the whole shifter/lever assembly. Let me know what worked for you.

Mahalos...