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Thread: Creaky Cranks ?!?

  1. #1
    MoJo Pimpin' Big Worm's Avatar
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    Angry Creaky Cranks ?!?

    Attention Carlos! Or anyone who is knowledgable about this. I am having major creaking coming from my XTR cranks. I have tried pulling the crank arms and cleaning then regreasing the spindles. But I think I actually made it worse.

    I am aware of this being a common problem with XTR cranks but its getting ridiculously annoying. Could it be the bottom bracket? If so, can it be fixed? Can it be cleaned then repacked? How does this work?

    Thanks for any responses!
    Playing with my money is like playing with my emotions!

  2. #2
    try explaining the internet to a bum!
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    carlos's Avatar
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    greetings big worm!

    ok, so you've taken the first step to figuring out what the problem is. when you remove the cranks, clean them, AND the hole in the crank arm where the spindle sits, AND the bolts and all the little washers, apply a thin, thin, flim-like coat of grease to the spindle. then apply a generous ammount to the washers on the crankbolts, the crankbolt threads, and the under sides of the bolt heads.

    if you've done this, we'll need to dig deeper.

    there are two types of XTR BBs. there is the BB-M950 which can be talken apart down the the individual bearings, cleaned up, greased, and put back together. if you have a 950, you'll need to take it apart and check to see if there is still grease in there and that the breaings, race ways and trackways havn't worn out. if they are fine then you probably need to over haul the bearing components of the BB. this may be costly as only Shimano has the special sized bearings AND needle bearings for these BBs. ask the mechanic, not a shop dude, at the LBS to call shimano.

    if you have the XTR BB-M952, you'll not have to worry about a bearing overhaul. this is a non-servicable BB. it wears out, you throw it away. easy and inexpensive.

    also, when you figure out what needs to be done as far as the BB internals are concerned, be sure to check to see that the BB cup threads have grease. creaking and ticking is also caused by dry cups. my suggestion to you would be that you stop using grease on teh cups and use Ti Prep or anti seize. it can be picked up at any local auto shop (look for the brand permatex) or bike shop. smear this stuff on only the BB shell threads. it's messy and tend to find it's way all over the bike.

    after you've checked all of this, make sure your chain ring bolts aren't loose. also remember that there is a backing bolt to the chainring bolts that hold the big and middle rings so make sure the backing bolt doesn't spin when you tighten the main bolt. if it does, you'll need to remove the main bolt, grease the threads and underside of the bolt head, THEN apply a small drop of blue or red lock tite to the lip on the backing bolt (never the threads). this lip contacts the middle ring and should help fix the backing boly to the middle ring and prevent it from spinning the next time you need to tighten or remove the chainring bolts. also check the bolts on the smallest chainring.

    finally check to make sure the pedals are tight.

    let me know if this helps.

  3. #3
    MoJo Pimpin' Big Worm's Avatar
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    Hey Carlos,
    Thanks for the quick reply! I will check these things and let you know if it works.
    BW
    Playing with my money is like playing with my emotions!

  4. #4
    try explaining the internet to a bum!
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    carlos's Avatar
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    cool. most of this work can be done by you but you're gonna need the tools.

    let me know.

  5. #5
    Mojo that juggles them rings! mgruene's Avatar
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    Don't forget to check the lockring that holds the spider in place. It's best to take that off and clean as well.
    Two wrongs don't make a right but three lefts do?!?!?!?!?!?

  6. #6
    try explaining the internet to a bum!
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    carlos's Avatar
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    thanks for the save mgruene. i forget the lock ring sometimes cause nost of teh aftermarket stuff is one peice.

  7. #7
    Mojo that juggles them rings! mgruene's Avatar
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    No worries. Tag team, that's what it's all about.
    Two wrongs don't make a right but three lefts do?!?!?!?!?!?

  8. #8
    try explaining the internet to a bum!
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    carlos's Avatar
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    like the Bushwackers?

  9. #9
    Mojo that juggles them rings! mgruene's Avatar
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    No, no. The Hydrilla-whackers!
    heheheheheheheeheheheheehehehhehehooooohhhhhhhhhah ahahaha
    Two wrongs don't make a right but three lefts do?!?!?!?!?!?

  10. #10
    Homesick for Texas Weeg's Avatar
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    Originally posted by carlos
    like the Bushwackers?
    Matt and Carlos contemplate this intriuging XTR Dilemma...
    Attached Images Attached Images  

  11. #11
    try explaining the internet to a bum!
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    i thought those guys were dead.

  12. #12
    Homesick for Texas Weeg's Avatar
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    Heh heh heh

  13. #13
    MoJo Pimpin' Big Worm's Avatar
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    Talking

    nice one!
    Playing with my money is like playing with my emotions!

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