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  1. #1
    Senior Member Sincitycycler's Avatar
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    Help getting rid of rear derailleur pulley squeak

    One (or both) of my pulleys is squeaking in the back of my 22 year old Univega commuter.

    Pulled both of them off, cleaned them, put a little grease on the axle, a shot of teflon spray lube still chirping somewhere!
    Solution? Many thanks
    "How did all those 'Keep Off the Grass' signs get there?"

  2. #2
    Senior Member nick burns's Avatar
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    Maybe it's the chain squeaking as it passes the jockey wheels & not the jockey wheels themselves?

  3. #3
    Senior Member Sincitycycler's Avatar
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    Quote Originally Posted by nick burns
    Maybe it's the chain squeaking as it passes the jockey wheels & not the jockey wheels themselves?
    Seriously? How does that happen?

    I oiled the crap out the chain, installed new pulleys, and there is still a squeak back there!
    "How did all those 'Keep Off the Grass' signs get there?"

  4. #4
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    Quote Originally Posted by nick burns
    Maybe it's the chain squeaking as it passes the jockey wheels & not the jockey wheels themselves?
    +1 on that suggestion, I've been fooled by this before.
    Specialized Allez Pro '06
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  5. #5
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    Quote Originally Posted by Sincitycycler
    Seriously? How does that happen?

    I oiled the crap out the chain, installed new pulleys, and there is still a squeak back there!
    Ah well then maybe it's not the chain. Not many other moving parts now are there? I'm stumped too.
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  6. #6
    The Improbable Bulk Little Darwin's Avatar
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    An idea just came to mind.... How about squeaky springs? Try cleaning and lubricating the spring(s) of the derailleur.
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  7. #7
    Senior Member Matt Gaunt's Avatar
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    Yeah, my money's on the mech spring. As it jogs up and down (emphasised by slightly stiff links in the chain) it will squeak unless there is a LOT of grease on there. You might even look into replacing it if possible - after all, a 22 year old spring can't be owing you any performance, can it?
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  8. #8
    Senior Member Sincitycycler's Avatar
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    Quote Originally Posted by Matt Gaunt
    Yeah, my money's on the mech spring. As it jogs up and down (emphasised by slightly stiff links in the chain) it will squeak unless there is a LOT of grease on there. You might even look into replacing it if possible - after all, a 22 year old spring can't be owing you any performance, can it?
    squeaky springs
    Ladies and gentlemen! All the way from Nevada! Give it up for "The Squeaky Springs!!!!!"
    That's the name of my next band.

    Seriously, I'll look at the springs. It's maddening because the rear d doesn't seem that complicated and it sounds like there is a little mouse in there gettin' down...
    "How did all those 'Keep Off the Grass' signs get there?"

  9. #9
    Senior Member juicemouse's Avatar
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    Definitely a mouse. Lure him out with promises of cheese.
    It is my belief that every person in this world has something to teach, and everything to learn.

    In memory of Jim Price (aka. sydney) ...

  10. #10
    Senior Member Matt Gaunt's Avatar
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    Quote Originally Posted by Sincitycycler
    Ladies and gentlemen! All the way from Nevada! Give it up for "The Squeaky Springs!!!!!"
    That's the name of my next band. :
    Matt
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  11. #11
    Senior Member Sincitycycler's Avatar
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    Next dumb question: How do you grease the springs? Do you have to remove them?
    "How did all those 'Keep Off the Grass' signs get there?"

  12. #12
    Sometimes knows stuff. rmfnla's Avatar
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    Quote Originally Posted by Sincitycycler
    Next dumb question: How do you grease the springs? Do you have to remove them?
    A shot of lube on the mounting points; that's the only part that could squeak. You do not have to remove them.

    HOWEVER, are you sure you properly lubed the pulley wheels?
    Every R derailleur squeak I have ever encountered (and there have been a few) was in the pulley wheels.
    Today, I believe my jurisdiction ends here...

  13. #13
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    If the squeek is constant as the chain is moving, I'll bet it is still the derailleur pulley. Take the pulley off and look at the bushing in the center. If it is worn out or has grooves it needs to be replaced and will squeek even when its lubed. This is from personal experience.

  14. #14
    Senior Member Sincitycycler's Avatar
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    Quote Originally Posted by thekorn
    If the squeek is constant as the chain is moving, I'll bet it is still the derailleur pulley. Take the pulley off and look at the bushing in the center. If it is worn out or has grooves it needs to be replaced and will squeek even when its lubed. This is from personal experience.
    I installed a set of brand new Shimano pulley and even put a dab of synthetic bearing grease on the axle (bushing) and I am still getting Topo.

    It must be something else!
    "How did all those 'Keep Off the Grass' signs get there?"

  15. #15
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    Lame! I hope the pulleys did not set you back too much. Were they worn out? Is the bike shifting well otherwise?

  16. #16
    jur
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    Do you hear this squeak when turning the cranks backwards, forwards, or both?
    My folding bike photo essays www.dekter.net/

  17. #17
    Senior Member Sincitycycler's Avatar
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    Quote Originally Posted by jur
    Do you hear this squeak when turning the cranks backwards, forwards, or both?
    Both ways.
    "How did all those 'Keep Off the Grass' signs get there?"

  18. #18
    jur
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    Good, that eliminates the freehub and the dork disc, assuming there is one. Has to be the derailer.

    The jockey pulleys have these stationary discs (one one each side) that press against the bearing bush; if these are bent or misaligned, then the pulley will rub against it and squeak.
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  19. #19
    Senior Member Sincitycycler's Avatar
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    Quote Originally Posted by jur
    Good, that eliminates the freehub and the dork disc, assuming there is one. Has to be the derailer.

    The jockey pulleys have these stationary discs (one one each side) that press against the bearing bush; if these are bent or misaligned, then the pulley will rub against it and squeak.
    The jock pulleys are new too.

    This is very mysterious and annoying malady.
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  20. #20
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    Lube the bolt that holds each pully on?

  21. #21
    Banned. sngltrackdufus's Avatar
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    Since you are sure it is in the derailleur,have you tried grasping it at the cage & moved it back & forth while holding the body?Maybe also try holding the whole body & rocking it forward & backwards? Isolation is the key.

  22. #22
    jur
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    Perhaps you might remove the chain and move/rotate each moving part to find the culprit.
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  23. #23
    semifreddo amartuerer 'nother's Avatar
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    I got an idea. Try replacing that 22 year-old chain, even though it's probably got no rust and enough oil for a Roman orgy.

    Something tells me it'll work.
    Can you pass the test?
    Yield to Life.

  24. #24
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    I too am encountering this problem. Haven't taken apart the pulleys yet, but if that doesn't solve it, it's good to know the chain might.

  25. #25
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    It's simple to determine whether the squeaking is chain or derailleur. If it's the chain there will almost always be a rhthym to the sound, and it will correspond to the amount of time the chain takes to make a revolution, which is simple the number of links in the chaine (100+) divided by the links on the large chainwheel. On a road bike it's typically a bit more than 2 crank revs.
    There's no such thing as a routine repair.

    Don't tell me what "should" be - either it is, it isn't, or do something about it.

    If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

    Please take the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!

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