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Help with Removal of Gearset from Hub

Old 03-29-14, 06:08 PM
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big420dog
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Help with Removal of Gearset from Hub

Hello Im trying to remove this gearset from this hub so I can change out the spokes but I cant for the life of me figure out which way this comes apart. It has written on the outside ring "Shimano VIA"
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Old 03-29-14, 06:13 PM
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It should just slide off.
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Old 03-29-14, 06:26 PM
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Well i've tried that and it doesnt. I tried 2 chain whips thinking maybe half the gears were threaded on. No luck. I also tried unscrewing the top and it doesnt seem to do that either...
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Old 03-29-14, 06:31 PM
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This is definitely the right place to ask.
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Old 03-29-14, 06:51 PM
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Originally Posted by prooftheory View Post
This is definitely the right place to ask.
It sure is. Which is why I moved it here from SS/FG
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Old 03-29-14, 07:01 PM
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that looks like a shimano uniglide cassette

the five largest cogs are held on by the smallest
and it is threaded on
it might be darn tight
but it is threaded on
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Old 03-29-14, 07:03 PM
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Soak it with WD40 or in gasoline.
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Old 03-29-14, 07:04 PM
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smallest Cog is screwed on, the largest ones are splined, But taken out of a wheel You are kind of screwed ,

as the leverage of the wheel rim is not there because some fool took the rim apart before removing the gear cluster

now you need to lace some kind of rim back on there again to remove the cassette.

Or you may just have scrap-metal ..
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Old 03-29-14, 07:18 PM
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With two good chain whips one should be able to loosen the small cog from the others then the rest will slide off. It's probably just dumb luck that this is a cassette and not a freewheel, given the rim being removed.

never remove a rim prior to trying to remove the cogs!
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Old 03-29-14, 07:33 PM
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The small cog unscrews CCW.

You need to hold the rest of the cassette stable with one chain whip and unscrew the small cog with a second chain whip. It will probably be hard to unscrew because your pedaling motion is constantly tightening it. I've had the best luck by positioning the two chain whips so that I can unscrew the cog by squeezing the two whips together.

Good luck!
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Old 03-29-14, 07:53 PM
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Originally Posted by Wilfred Laurier View Post
that looks like a shimano uniglide cassette

the five largest cogs are held on by the smallest
and it is threaded on
it might be darn tight
but it is threaded on
This is correct. Unscrewing the top cog will allow the rest to come off. However, it's going to take a lot of force to break that cog loose, especially if it's been there 20+ years. Clamp one chain whip in a vise, wrap the chain around the third cog, and use the other chain whip on the small cog. It's awkward, and the small cog tends to let go suddenly. Don't get your fingers caught between the chain whips.

Here's what your hub will look like without the cogs (on the left):

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Old 03-29-14, 10:08 PM
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if it's a uniglide, and i have no reason to doubt it, but then again i don't really know, i think i might want to take the advice of using a vice to hold one of the chainwhips. IME, those cog teeth can make one of the nastiest wounds you'd ever NOT want to have. additionally, i would seriously consider using some kind of cheater bar or pipe over the chainwipe that is on the small cog and stand back a bit. spreading the force necessary to break the cog loose by using the long cheater bar will reduce the drama associated with the process to an acceptable level.

of course, nothing like this has ever happened to me , so it's just a suggestion.
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Old 03-30-14, 07:15 AM
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As others have said, it's a Uniglide freehub and cassette and the smallest cog threads on. All the others will just slide off, so if you don't care about keeping the smallest cog, you could just use a Dremel tool and try to cut it in half to remove it.

Another thing you can try, since you just want to replace spokes and already have the axle out, is to remove the freehub body from the hub. But you are probably going to have the same leverage problems as you do trying removing the cassette cogs from the freehub. But since pedaling forces do not tighten this bolt, it might be looser. The freehub is attached to the hub using a fixing bolt that takes a 10mm allen wrench.

Last edited by Gonzo Bob; 03-30-14 at 08:18 AM.
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