"Martin Wilson" <
[email protected]> wrote in message
news:
[email protected]...
> Maybe here I might be able to do something. As yet I've not ever
> undone the nut that holds the wire just used the handlebar twist
> adjuster where the cable exits the handlebar assembly.
>
First thing you need to do is set the cable tension correctly. Follow these
steps:
1. Shift to the largest chainring at the front and the smallest sprocket at
the back
2. Move the rear shifter one step. The chain should shift to the second
smallest sprocket. If it doesn't shift, the cable is too loose. If it
shifts to the third smallest sprocket, the cable is too tight. If
necessary, adjust the cable tension by turning the adjusting barrel one turn
at a time to get the chain onto the second smallest sprocket (with the
shifter still in the same position)
3. With the chain still on the second smallest sprocket and the the shifter
still in the same position, turn the pedals forward and tighten the
adjusting barrel one turn at a time until you get a clear rattling noise.
Have a look and check that this rattling is caused by the chain rubbing
against the third smallest sprocket. Once you have the rattle, keep turning
the pedals and LOOSEN the barrel one quarter turn at a time until the rattle
goes away.
> Where do you get the bolt on hangers? Is there a part number for them?
There are quite a few variations. I would recommend going to a bike shop to
make sure you get one suitable for your frame & new derailleur. The
following shows an example of one:
http://www.shimano-europe.com/cycling/phpimages/product/exp_view/RD_M330.pdf
Getting a new derailleur might be more hassle than it's worth - make sure
you have got the existing one as good as you can get it before deciding to
get a new one.
Ian