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Old 08-17-07, 11:04 AM   #1
shakeNbake
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Went gorrilla-grip on my Campy Ultra-Torque crank

Alright, I haven't been on my bike for a week now. I was just putting it on the stand, rotating the crank backwards I felt a snag on every revolution. It tried to check the chain, cassette, both derailleur, etc, but couldn't find the source.

And then I tried to move the crank laterally away from each other. HOLY ****BALLS!! They were loose. I mean there was a good 4-5mm of play. The bolt that held them together had come loose to the point of finger-tightening.

I thought I had tightened them enough, so I got my 10mm hex and just tightened it as much as I can. I guess I should've gotten that torque wrench, eh?
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Old 08-17-07, 09:21 PM   #2
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You really do need to torque this bolt down to spec. If it is torqued to spec, the washer (notice it isn't flat) will exert a significant amount of force (it's either 1300lbs or 1500lbs, I can never remember) to keep it tight.

Also it is important that you keep the C-clip installed on the drive side. This isn't just for assembly. Lastly, this is true for any set-up where the cups mount outside the BB shell, make sure your BB shell is properly faced. This will greatly extend bearing life.
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Old 08-17-07, 11:59 PM   #3
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Quote:
Originally Posted by Bob Dopolina View Post
You really do need to torque this bolt down to spec. If it is torqued to spec, the washer (notice it isn't flat) will exert a significant amount of force (it's either 1300lbs or 1500lbs, I can never remember) to keep it tight.

Also it is important that you keep the C-clip installed on the drive side. This isn't just for assembly. Lastly, this is true for any set-up where the cups mount outside the BB shell, make sure your BB shell is properly faced. This will greatly extend bearing life.
Yeah, I got the shell faced before I put them in. Thanks
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Old 08-18-07, 05:36 AM   #4
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If you look at the Ultra-Torque warning Campa published, you will see a picture of a hand-held hex key being used. It has a big X through it, and NO in several languages. The other picture shows a torque wrench and the proper values with it, and YES in the same languages.

Just because I have a good heart : http://www.campagnolo.com/techinfo.php?did=f
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