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PostPosted: Mon Oct 22, 2018 10:05 pm 
Retro Guru

Joined: Tue Feb 21, 2012 9:53 am
Posts: 867
Location: the shed
On my LH shifter it's fine shifting from granny to middle. Won't shift into big ring though. Is this a common problem? And is there a quick fix? It's a 1997 shimano lx shifter.


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PostPosted: Mon Oct 22, 2018 10:17 pm 
GOLD | PoTM | Rider | rBOTM
GOLD | PoTM | Rider | rBOTM
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Joined: Tue Feb 26, 2013 6:26 pm
Posts: 23022
Location: 54 Festive Road Winchcombe GLOUCS Yarp...
Your sure it’s the shifter not the mech?


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 Post subject: Re:
PostPosted: Mon Oct 22, 2018 10:33 pm 
Retro Guru

Joined: Wed Jan 06, 2010 12:03 am
Posts: 260
If the mech limit screws are adjusted ok (try pulling mech cage manually for full movement with slack or loosened cable), then the shifter may be stuck in middle to top position while your mechs in bottom to middle. Spray plenty of wd40/gt85 in through the cable opening while working the levers both ways & pulling on the inner cable. If it frees up then drip some machine/gear oil back into the shifter afterwards. If not then shifter maybe toast.


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PostPosted: Mon Oct 22, 2018 10:39 pm 
GOLD | PoTM | Rider | rBOTM
GOLD | PoTM | Rider | rBOTM
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Joined: Tue Feb 26, 2013 6:26 pm
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Location: 54 Festive Road Winchcombe GLOUCS Yarp...
He said it bettererer


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 Post subject: Re:
PostPosted: Mon Oct 22, 2018 11:02 pm 
Gold Trader
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Joined: Fri Jan 23, 2009 2:30 pm
Posts: 14842
Location: Surrey
To rule out the shifter, simply pull on the cable while spinning the crank. If it shifts through all rings then it could either be:

A) Not enough tension in the cable. Easy fix - tighten the cable.

B) Time to replace your old worn cabling with new inner and outer cable if there is any significant resistance when pulling on the cable.

C) Fine tuning/adjustment of the cable may be needed using the cable barrel adjuster on the shifter.

D) Shifter may be broken or simply need lubrication to free up that sticky grease that has been doing a good job for years until now. (Wd40/gt85 is your friend).

If it doesn't shift through the rings it could be that you need to adjust the limit screws on the mech to allow it to move further when the cable is pulled.

Hope you get it sorted/find the problem.


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PostPosted: Tue Oct 23, 2018 12:05 am 
Old School Grand Master
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Joined: Thu Nov 26, 2015 7:29 pm
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Location: peak district
Could be wrong bb length also, have you recently changed bb?

mark


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 Post subject: Re:
PostPosted: Tue Oct 23, 2018 8:01 am 
Retro Guru

Joined: Tue Feb 21, 2012 9:53 am
Posts: 867
Location: the shed
It's as though even though it's goes into granny ring, the shifter window isn't dropping down fully to 'L'. When in granny, the shifter indicator shows its between L and the position for middle ring.


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 Post subject: Re:
PostPosted: Tue Oct 23, 2018 8:17 am 
Gold Trader
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Location: Surrey
That could just mean the rear indicator isn't fully attached or has broken. Depending on the model you should just be able to pop it off and check. Reseat if poss or confirm broken.


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PostPosted: Tue Oct 23, 2018 8:36 am 
King of the Skip Monkeys
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Joined: Wed Nov 07, 2007 4:34 pm
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Location: in the shed
The grease solidifies around the pawls, they need a proper clean out. 3in1 is very good. Do both shifters.


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 Post subject: Re:
PostPosted: Tue Oct 23, 2018 9:37 am 
Retro Guru

Joined: Tue Feb 21, 2012 9:53 am
Posts: 867
Location: the shed
Thanks for taking time out to reply guys. Guess what I will be doing after work :)


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