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  1. #1
    mtbr member
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    XTR rear derailieur crisis please help!

    Just got done swapping my XT RD-M737 with a RD-m910 that I recently purchased. Install went great.

    Except that I noticed that the return spring is not attached to anything on one side of the parrallelogram.Which kind of makes all my effort worthless. Its just kind of flopping around in there. Is there an on-line source of closeup photos that can help guide me through this? Do I HAVE to take the whole assembly back off the bike and pop open the unit????

    Or worse yet.... Is it trashed?

  2. #2
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    Reputation: Bikinfoolferlife's Avatar
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    Feb 2004
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    Reattaching a spring I can't help you with, but I doubt you'd want to try it with it mounted to the bike. Since that's an old derailer (NOS I assume) I wonder if you could return it in exchange for one with the spring attached.
    "...the people get the government they deserve..."
    suum quique

  3. #3
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    Actually it was an Ebay find...

    and I raided my Wifes sewing box and used her "stich puller" (Or whatever the hell they call it) and used it to fa-nagle the spring back onto the hook.

    Crisis averted!

    BTW What is the big deal about XTR??? My old XT was just as good! Oh well.... now I know that I am not one of those bikers that requires the best.

    Life shall be much simpler from now on.

  4. #4
    All 26.5" all the time!
    Reputation: Zanetti's Avatar
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    Shimano rear derailleurs are riveted together at the pivots of the parallelogram, so a complete disassembly isn't possable with the intent of using the derailleur again unless you're a highly skilled machinist.

    You most likely won't need to disassemble anything, although removing the RD from the bike will make things much easier.

    Shimano rear derailleurs of that time period came with a light action coil return spring. I'd bet one of the hooked ends has come off its anchor point. Look carefully for the hooked end of the spring and its attach point. You'll need a long, slender hook type tool to pull the spring back in place.

    Edit: looks like you got it. Good job.

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