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  1. #1
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    Overhaul Shimano 6 speed hub

    I am overhauling an old hub for the first time and there seems to be dirt/sand inside de hub's freewheel systeem. How do I open the hub to clean it up?

    This is my a photo of the hub:
    shimano-6sp.jpg

  2. #2
    coprolite fietsbob's Avatar
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    take off the cogs, [2 chain whips] then look for the allen hex sleeve bolt that holds
    the freehub sub assembly on,
    once you removed it, drop it in a cup of solvent.
    [cogs off it won't have to be that big a cup]

    spin and blow it dry with compressed air.

    lubricate again .. 90 wt gear oil .. Phil tenacious etc.

    if you cant separate the freehub. try to plug the other side so it
    will itself fill be the container of solvent,
    to soak out the old oils and the grit it holds inside.

  3. #3
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    You need either a 10mm hex (Allen) wrench, or a special tool that fits earlier hubs. Without knowing which you have, it's hard to tell. There's no need to remove the cogs as Bob said.

    Here's instructions: http://www.parktool.com/blog/repair-...reehub-service
    Jeff Wills

    All my bikes.

  4. #4
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    I decided not to remove the freehub. I used WD40 to get some of the dirt out and it is freewheeling fine now.

    However, how do I put the axle back in? There is a one side has a large and longer nut that the other side.

    Please also see the image.

    hub-axle.jpg

  5. #5
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by koenFG View Post
    I decided not to remove the freehub. I used WD40 to get some of the dirt out and it is freewheeling fine now.

    However, how do I put the axle back in? There is a one side has a large and longer nut that the other side.

    Please also see the image.

    hub-axle.jpg

    That's why you always leave the right side assembled and disassemble from the left. It's harder (but not impossible) to get mixed up.

    Seeing the age of your hub, I think the shorter spacers go on the right (cassette) side and the bigger spacers on the left. If it doesn't work, flip 'em around.
    Jeff Wills

    All my bikes.

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