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cassette repalcement woes

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cassette repalcement woes

Old 02-19-10, 09:16 PM
  #1  
lesiz
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cassette repalcement woes

Simple job turns sour.
I'm trying to replace a Dura Ace cassette. So, I set the chain whip and the spline tool with crescent wrench. I push, but it won't come undone. I exerted enough that the spline slipped a couple of times.
How do I get this sucker off, short of using a cannon?
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Old 02-19-10, 09:33 PM
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lock the cassette tool down
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Old 02-19-10, 09:35 PM
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Originally Posted by reptilezs View Post
lock the cassette tool down
+1

And hopefully you didn't already strip the splines on the lockring.
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Old 02-19-10, 09:43 PM
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I use the scewer without the spring to hold the tool in place.
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Old 02-19-10, 09:52 PM
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Use your quick release to hold the tool down
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Old 02-19-10, 09:56 PM
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Originally Posted by tdot View Post
Use your quick release to hold the tool down
Post #4
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Old 02-19-10, 10:37 PM
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Yep. Tighten down to fully engage. Then remove. Use a torque-wrench if at ALL possible.

Last edited by Panthers007; 02-19-10 at 10:55 PM. Reason: I missed a 'n' - sue me.
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Old 02-19-10, 10:44 PM
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Originally Posted by Panthers007 View Post
Yep. Tighten down to fully engage. The remove. Use a torque-wrench if at ALL possible.
Before we go any further the shimano spec is 30-50Nm. I would define that as HELLA-tight.
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Old 02-19-10, 10:55 PM
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Originally Posted by operator View Post
Before we go any further the shimano spec is 30-50Nm. I would define that as HELLA-tight.
yep!
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Old 02-20-10, 11:04 PM
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Lock the cassette tool down with the quick release? I can't picture how that works, but I'll get all the parts in front of me and see if I can figure it out. The lock ring doesn't look stripped.
Thanks, for the help. I'll report back whether I get the friggin' thing off or not.
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Old 02-20-10, 11:08 PM
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Does your cassette tool have a hole in the middle? A rod? I used one with a rod, and I liked it, but my personal tool is a cassette tool with a hole that I drilled in the middle for a skewer, just in case something like your problem occurred.
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Old 02-21-10, 02:21 AM
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Originally Posted by Panthers007 View Post
Yep. Tighten down to fully engage. Then remove. Use a torque-wrench if at ALL possible.
I don't want to start another "torque wrench vs. no" debate, but it is 100% unnecessary to use a torque wrench for removal of a fastener.
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Old 02-21-10, 02:39 AM
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Originally Posted by LarDasse74 View Post
I don't want to start another "torque wrench vs. no" debate, but it is 100% unnecessary to use a torque wrench for removal of a fastener.
Oh come on, what if we overloosen it? We might create a localized black hole. I hate those, people always ask where my clothes went

If it helps anyone, here's what HELLA-tight-aka-50Nm looks and sounds like:
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Old 02-21-10, 02:43 AM
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Originally Posted by mechBgon View Post
Oh come on, what if we overloosen it?
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Old 02-21-10, 05:52 AM
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lock the tool on, put the tool in a vise, grab on to both the wheel and chain whip, and turn them both together. You get a lot of torque by holding onto the rim. I do it this way but use an old chain wrapped in a rag and then wrapped around my hand. I them turn the wheel with both hands. The chain gets tight on my hand but usually the lockring gives before my fingers get sliced off. I hate it when that happens.
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Old 02-21-10, 06:44 AM
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Originally Posted by mechBgon View Post
Oh come on, what if we overloosen it? We might create a localized black hole. I hate those, people always ask where my clothes went
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Old 02-21-10, 08:19 PM
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Are you turning it the correct way ? Never hurts to ask sometimes.
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Old 02-22-10, 11:38 PM
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If you've stripped the splines, it shouldn't be too hard to get the lockring off with a 4" grinder. You'd need to remove the spindle first, obviously.

I'd use a mostly worn-down 3mm cutting disc. You should only need to get the flat bit with the locking teeth off the threaded part, which should then come out by hand or with pliers. You could prolly do it without even touching the outer cog.
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Old 02-23-10, 10:32 AM
  #19  
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Hi. Somebody here once said,,to back the wheel into a corner. It works for me. Chris
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Old 03-01-10, 09:32 PM
  #20  
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Happy ending.

I got it off the wheel, and got the new one on.

After all this disussion, it turned out to be a problem only in my imagination. When I first tried to loosen it, the wrench moved, but in a kind of ratcheting motion. Something in the assembly gave it that feel as I started to unloosen it, and tha freaked me out, as I thought the spline was slipping.

I should have known better -- if the spline was slipping, it would have been completely trashed -- which it wasn't. All I needed to do was keep turning, and it would have come off.

I realized that a couple of days later and continued the turning the wrench and voila, the cassette was off.

My spline wrench, btw does not have a hole in the center for the quick-release to go thru. It instead has a pressed-in shaft that fits into the quick-release hole in the cassette.

Just like Snow White, a happy ending.

Seeya at the top of Deer Creek Rd.

Last edited by lesiz; 03-01-10 at 09:35 PM. Reason: mo betta
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