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Cassete disassembling

Old 03-17-11, 12:49 PM
  #1  
Yawny
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Cassete disassembling

Hello
I'm trying to disassemble my cassete but i don't know how to do it i
Here it is


I tried to disassemble it and got this:

This:

And:

So i cleaned everything up and after much head scrathing and trying i got it together and working again


But i wanted to get the cogs out so i could clean them can anyone help me? :S
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Old 03-17-11, 01:03 PM
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Sweet potatoes...
I could be completely wrong here (probably not though, cassettes don't have bearings...), but that looks more like a freewheel to me. In which case, they don't come off.
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Old 03-17-11, 01:15 PM
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Originally Posted by oban_kobi View Post
Sweet potatoes...
I could be completely wrong here (probably not though, cassettes don't have bearings...), but that looks more like a freewheel to me. In which case, they don't come off.
Yeah i disassembled the freewheel thinking it was the cassete?????
After much head scratching and insanity it's working again but still i couldn't disassemble what i wanted :S
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Old 03-17-11, 01:23 PM
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Yep, that's a freewheel. Congrats on accidentally doing something many fear to do deliberately. A two-pronged freewheel puller would have let you remove it from the hub intact. Two chainwhips would probably let you pull the sprockets off. Outer sprocket(s) unscrew counter clockwise, inner sit on splines.
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Old 03-17-11, 01:24 PM
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Those type of gears tighten through use and can be nearly impossibe to remove. What you took off was the portion of the hub that the freewheel threades on to.
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Old 03-17-11, 04:16 PM
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Thanks Dabac will try to do it tomorrow
Will see how it goes
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Old 03-17-11, 04:37 PM
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You don't need to take apart a freewheel or a cassette to clean it. Fold a rag over and "floss" between the cogs. Add some mineral spirits or kerosene to the rag if needed.
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Old 03-17-11, 04:39 PM
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OK so you've dis-assembled the freewheel, which I assume at this point you don't wish to rebuild. If that's the case, it's easy to get the body of the hub.

If you have a big Stilson (pipe) wrench, fit it over the body wherever you can get a purchase and spin it off to the left. I saod spin it off, but be aware it takes serious torque so you want a wrench that reaches all the way out to the rim and expect to put elbow grease to it.

Alternatively, see if you can get a bite on it with a vise, probably best to hold on the two recesses that the pawls pocket into. Tighten the vise firm, but don't go crazy because ovalizing the body will make it harder to turn off. Now grab the wheels at 9 and 3 and Channel the spirit of Ralph Cramden, and pretent you're making a left turn on a big bus without benefit of power steering.

Whether you use the pipe wrench or vise, don't be surprised if your wheel protests a bit with some spoke pinging, thise guys are in tight.

BTW- if you want to save and rebuild the freewheel, you need a freewheel tool - SunTour 2-prong version, regardless of brand. Fit it to the 2 notches, secure it with your QR skewer, and turn it off. The minute it moves, loosen the skewer to allow the body to move out on the threads.
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Old 03-17-11, 04:55 PM
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Thanks Al1943 will try it, even if i'm itching to disassemble it!
FBinNY i alreaddy reassembled everything (cleaned and whatnot) because i didin't know i could take it off of it, but thank you very much that's good to know in case i ever need to take it off!!
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Old 03-17-11, 09:26 PM
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Originally Posted by Yawny View Post
Thanks Al1943 will try it, even if i'm itching to disassemble it!
FBinNY i alreaddy reassembled everything (cleaned and whatnot) because i didin't know i could take it off of it, but thank you very much that's good to know in case i ever need to take it off!!
I'm impressed! I've never had the guts to take one apart, and probably wouldn't be able to ever get it back together again.
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Old 03-18-11, 08:46 AM
  #11  
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Originally Posted by dabac View Post
Two chainwhips would probably let you pull the sprockets off. Outer sprocket(s) unscrew counter clockwise, inner sit on splines.
One chainwhip will do if you can screw/bolt the FW to the bench.

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Old 03-18-11, 01:19 PM
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Originally Posted by oban_kobi View Post
I'm impressed! I've never had the guts to take one apart, and probably wouldn't be able to ever get it back together again.
It's easy you just need a tray and patience and if you take your time you can do it

Last edited by Yawny; 03-18-11 at 01:23 PM.
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