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HELP - BB Stuck(6 posts)

HELP - BB Stuck52-16SS
Dec 10, 2003 6:53 AM
Wanted to overhaul my DA BB last night. Only problem was that it was stuck solidly in the thread (or so it appears). I finally managed to get the right hand adapter and subsequently the spindle and bearings out, but the remaining left hand adaptor (lock ring is removed) will not move. I've applied more than 600 lbs*in only resulting in the splines being ruined. So now I have a stuck BB with very little spline - even better :0(
The thread is Italian and the frame is aluminium.
What to do????

http://bike.shimano.com/product_images/BB/si_images/BB-7700-BB7703.pdf
re: HELP - BB Stuckrussw19
Dec 10, 2003 7:10 AM
So the threading is Italian.... do you know that means righty tighty, lefty loosey on BOTH sides?

Just checking... it messes some people up. Make sure you are not just tightening it more....

Russ
yep..52-16SS
Dec 10, 2003 7:23 AM
Normal thread on both sides - but since it is the non-drive side that is the problem it would be the same anyway.

Sten
OK..heres the next thing to try then...russw19
Dec 10, 2003 7:35 AM
Spray some PB BLaster onto the threads from the other side of the frame. Use the straw to get it into the threads under the cup from the side you removed. Let it sit for a while to work into the threads, like an hour or so. Then use something to lock down the tool so it doesn't slip and strip out the threads in your cup. I've used a headset press in the past... but any bolt long enough with big washers and nuts on the end will work. Use a long wrench and a rubber mallet or a "cheater bar" (some long piece of pipe that goes over the wrnech's handle to add more leverage) and SLOWLY turn that sucker out of there.

If it doesn't come out, you could try heating your BB shell, but be very careful not to ruin the paint when doing this. An acetelene tourch maybe too much for this, but I have a hockey stick heater (which is suped up and very hot hair dryer effectively) that works, but just be very careful not to damage the BB shell doing this.

Remember, the BB is way cheaper than your frame... if worst comes to worst, you can cut it out with a hacksaw blade, but if you do that, be careful of your frames threads. I have had to cut out a fixed cup before... just rechase the threads when you are done if it comes to that.

Russ
Thanks (nm)52-16SS
Dec 10, 2003 7:50 AM
Just another hintWOY
Dec 11, 2003 6:35 AM
Put the BB tool into a strong bench vice and use the frame as a lever. You can also use a rear QR and wishers to secure the BB tool onto BB.

Good luck,
Wayne