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help needed on repair

post #1 of 4
Thread Starter 
Coach wrote:
> Hi
> Had the bike a 2 weeks, noticed that when I stop pedalling, the
> derailleur tension? cannot turn the rear gears around, and so the
> chain goes slack.


This could be due to a fault in your freewheel or hub and not related to the
broken spoke protector. A bike shop mechanic should advise after having a
look & twiddle. (How's that for a pub name?: The Look and Twiddle).

> Looked at it and found that the plastic rear "chain guard" between the
> spokes and the last gear had broken a little lug that holds it in
> place(one of three)
> snapped it completely off and it now spins back as it
> should....however it isn't held in place properly now.
>
> Q The rear gears are on a quick release jobby...I take it I just
> release it, drop out the wheel, but then will have to remove the
> gears off the spindle to fit the guard jobby?


I think you'll have to remove the sprockets* to fit a new guard aka
protector, but maybe you could bust the existing one off with the sprockets
still in place. It's not necessary to have one if your gears are adjusted
well.

* How you do this depends on whether it's a freewheel or cassette. See
http://www.sheldonbrown.com/free-k7.html

Also see http://www.parktool.com/repair/bikemap.asp

~PB
post #2 of 4

Re: help needed on repair

Mike wrote:

> Your problem is the plastic thingy jamming your freewheel.
>
> The best repair you can make without specialist tools is to cut the
> plastic thing off entirely (you will probably need to cut it into 3 or 4
> pieces with really strong scissors and pliers).
>
> Everything will work perfectly then.


As long as the OP makes sure that the limit screw is set so that there
is no chance of shoving the derailleur into the spokes. That would not
be good.

--
Dave...
post #3 of 4

Re: help needed on repair

In article <dFzgh.7795$493.6572@newsfe4-gui.ntli.net>
Coach <coach.pantusso@ntlworld.com> wrote:
> Hi
> Had the bike a 2 weeks, noticed that when I stop pedalling, the derailleur
> tension? cannot turn the rear gears around, and so the chain goes slack.
>
> Looked at it and found that the plastic rear "chain guard" between the
> spokes and the last gear had broken a little lug that holds it in place(one
> of three)
> snapped it completely off and it now spins back as it should....however it
> isn't held in place properly now.
>
> Q The rear gears are on a quick release jobby...I take it I just release it,
> drop out the wheel, but then will have to remove the gears off the spindle
> to fit the guard jobby?
>

Have you got (or can you borrow) a hot glue gun? If so, just glue the
spoke protector disc to a few spokes to stop it rattling around. Or
drill a few holes and attach it with zip ties. Or as someone else
suggested, smash it up into little pieces and throw it away - it doesn't
do anything useful unless you bend the rear derailleur so much that it
gets chewed up by the back wheel, or your gears are so far out of
adjustment that the chain throws off the inside of the sprockets and
chews the spokes.
post #4 of 4

Re: help needed on repair

in message <dFzgh.7795$493.6572@newsfe4-gui.ntli.net>, Coach
('coach.pantusso@ntlworld.com') wrote:

> Had the bike a 2 weeks, noticed that when I stop pedalling, the
> derailleur tension? cannot turn the rear gears around, and so the chain
> goes slack.


You're not giving us enough detail, but it sounds like something's badly
wrong with the freewheel. It's possible that splinters off the plastic
disk have got lodged in the mechanism.

> Looked at it and found that the plastic rear "chain guard" between the
> spokes and the last gear had broken a little lug that holds it in
> place(one of three)
> snapped it completely off and it now spins back as it should....however
> it isn't held in place properly now.
>
> Q The rear gears are on a quick release jobby...I take it I just release
> it, drop out the wheel, but then will have to remove the gears off the
> spindle to fit the guard jobby?


If the rear mech is properly adjusted that plastic disk does nothing useful
anyway, so take it off and throw it away - and keep your mech adjusted.

Cheers

Simon

--
simon@jasmine.org.uk (Simon Brooke) http://www.jasmine.org.uk/~simon/

;; ... exposing the violence incoherent in the system...
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