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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 08-09-10, 01:01 PM   #1
mondaycurse
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Tight bottom bracket, slipped tool damaged teeth :(

For whatever reason, I felt the need to take the bottom bracket out of my 1998 GT LTS last night. I applied plenty of penetrating oil, but I don't know how much of a difference it made. The drive side was tight, but I managed to get it out, regrease the threads, and put it back it. Non-drive was also tight, very tight, and I managed to screw everything up. I have it out maybe 4 thread lengths, but my bottom bracket tool slipped on me (user error most likely) and the tool let loose with a destructive grind to the teeth on the bottom bracket.

Any ideas on how I can get enough leverage to remove a tight bottom bracket without using the standard methods?

EDIT: Just thought to put the exposed threads in a vise grip. Hopefully I can get enough grip that way and it doesn't matter if I damage the threads (getting a new cup anyways). Kind of an "oh duh" moment, but writing out my problem helped out quite a bit. Just in case, any other tips?

Last edited by mondaycurse; 08-09-10 at 01:12 PM.
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Old 08-09-10, 01:06 PM   #2
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What kind of bottom bracket do you have? Pictures?
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Old 08-09-10, 01:39 PM   #3
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If it isn't completely stripped you may be able to extract it by just bolting in the tool - depending on what bb it is. I'm guessing it's an octalink/shimanon splined tool you're using?
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Old 08-09-10, 05:20 PM   #4
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Don't take any chances. Always bolt the tool to the BB spindle when removing the BB. Save your knuckles.
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Old 08-09-10, 10:22 PM   #5
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Quote:
Originally Posted by shouldberiding View Post
Don't take any chances. Always bolt the tool to the BB spindle when removing the BB.
Lesson learned, the hard way. I managed to saw the old cup out with a hacksaw blade without messing up the threads.
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