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Old 07-27-07, 07:45 AM   #1
look57
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Tune B/B removal

I am trying to remove a b/b from my Look road bike (british thread) but am having problems. I have managed to get the crank arms off but the bottom bracket is a bit of a mystery. It doesn't help that the b/b bracket is made by a small manufacturer from Germany called Tune. To give you an idea of the setup, see these pictures:




















This is Tune's image of the b/b

Here's what I've tried to do:
1. There are holes in the cup, so it would make sense that you put a pin spanner in two of the holes and turn anti-clockwise on the Left (non-drive) side to loosen. There seemed to be a lot of resistance when I attempted this and as I didn't want to damage anything I backed off.

2. Sprayed penetrating fluid (wd40) around the cup in case it's seized/stuck. Lightly tapped around the area to further aid any seizing.

3. I have looked at Park's repair guides and Todd Down's book but they really don't go into much detail about removing anything other than Shimano/Campag. I have also contacted the manufacturer so maybe something will turn up there (still waiting).

From the Tune b/b image above, it looks as though both cups twist off. Anyone got any advice?

Last edited by look57; 07-27-07 at 09:11 AM.
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Old 07-27-07, 08:46 AM   #2
operator
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1) Retake the fuzzy pictures or delete, they don't help
2) Yes, you need pin spanner and apply more pressure. The worse thing you can do is break your tool. If the bike has been ridden a while with that bb in there without being taken apart it is also likely it is seized in there. If that is the case you're going to have to resort to destructive removal. Take a look at the bottom of the following page
http://www.sheldonbrown.com/tooltips/bbcups.html
3) I'm willing to bet that the WD-40 didn't penetrate anything. If you really need something for that purpose, liquid wrench.
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Old 07-27-07, 09:20 AM   #3
look57
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Quote:
1) Retake the fuzzy pictures or delete, they don't help
Unclear images deleted. Camera not the best at taking close up shots.

Quote:
2) Yes, you need pin spanner and apply more pressure. The worse thing you can do is break your tool. If the bike has been ridden a while with that bb in there without being taken apart it is also likely it is seized in there. If that is the case you're going to have to resort to destructive removal. Take a look at the bottom of the following page
http://www.sheldonbrown.com/tooltips/bbcups.html
Will take a look -thanks.

Quote:
3) I'm willing to bet that the WD-40 didn't penetrate anything. If you really need something for that purpose, liquid wrench.
Sorry can't do, "liquid wrench" not available in Europe.
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Old 07-27-07, 09:54 AM   #4
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I took a cup and cone bb off last weekend. Here is what I did. On the drive side the lockring comes off first. Without having a C spanner, I put a flathead screwdriver in one of the groves and knocked it with a hammer to the left untill It came loose and took it off the rest of the way by hand. BTW first I spayed all the threads with wd40 to help free the threads. Second the adjustable cup comes off. First I tried a bent spoke. It wasn't strong enough. Next I stuck to nails into the holes and tuned them to the left together untill it came loose and continued unscrewing it. Now you can remove the spindle bearing and seals.

Finally, the fixes cup on the left side. It is reverse threaded so it turns to the right to take off. I brought the frame with the wheels removed downstairs and mounted the skimpy wrench flats in a bench vice. Then, I turned the bike to the right. That loosened the cup and I took it off the rest of the way by hand and with a pipe wrench.
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Old 07-27-07, 11:25 AM   #5
look57
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Yay! Good news, I managed to get the b/b off with my trusty pin spanner and a few light taps with a rubber hammer. Thanks for the help.
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