Hello,
Best advise on a stuck cup is turn the frame over and pour transmission (trans) fluid all around the threaded area and it will penetrate over time. Be patient and let it sit for a few days while the frame is laying on its side and the trans fluid is soaking in. Do not soak the trans fluid on the paint because this hydraulic fluid will wreck the paint. This soaking technique really works, but patience is the key. Then tap it with a rubber mallet to jar it and then re-soak in the trans fluid. There is clearance between the cup and the bottom bracket shell, and most of the time it is rust bonding the two metals. Eventually it will come out. I would do this over and over before I would try the more progressive levels of removal, like welding, heating, etc. Be patient. Then take the frame cup tool and it should just come right out. Good luck.
Best Regards, John Proch La Grange, Texas
________________________________ From: Andrew R Stewart <onetenth@earthlink.net> To: paccoastcycles <paccoastcycles@sbcglobal.net>; kim klakow <Akimbo71@gmx.net>; classicrendezvous@bikelist.org Sent: Sun, June 20, 2010 1:34:50 PM Subject: Re: [CR] Seized LH cup: How to?
Chuck gives good advice. The tool that I have is a Kingsbridge brand. To use remove the other cup, remove the balls and old lube, insert the long side of the tool into the stuck cup (there's a long enough side that sticks out past the shell's other end so the tool's wrench flats can be grabbed). Then depending which way the cup is threaded I clamp either side of the tool in a bench vice and use my 18" crescent wrench with added leverage from a piece of pipe. When you turn the frame it should produce a self tightening torque on the tool. I have come across only a very few cups that I couldn't remove in 35 years. Those few were ground out.
The tool is very simple and would be easy to produce. I would be happy to photo mine and send a link along.
----- Original Message ----- From: "paccoastcycles" <paccoastcycles@sbcglobal.net> To: "kim klakow" <Akimbo71@gmx.net>; <classicrendezvous@bikelist.org> Sent: Sunday, June 20, 2010 1:02 PM Subject: Re: [CR] Seized LH cup: How to?
> Kim,
>
> If you can get the fixed cup out, there is a tool that is basically a big bolt and nut, though they are cylindrical with wrench flats on them so they're easier to use. The idea is that the two parts are screwed together with the tightening direction going in the direction you need to turn the cup. When they are hell for tight, turning the tool will naturally tighten and at the same time it will turn the cup. That is, when the gripping force of the tool is greater than the hold between the frame and cup.
>
> If that doesn't work for you, after removing the rest of the BB, you could take it to a welder and have a lever welded to the cup. The heat of a TIG or MIG would possibly help in breaking the bond between the two pieces and hopefully not burn the paint.
>
> I hope that's helpful.
>
> Chuck Hoefer
> Pacific Coast Cycles
> Oceanside, Calif
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Andrew R Stewart
Rochester, NY