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Ultegra cartridge installation...(4 posts)

Ultegra cartridge installation...turtlehead
Sep 17, 2002 3:08 PM
I installed an ultegra bottom bracket cartridge today for the first time. I noticed that, when I threaded the drive side into the frame, it took a little precision to get the threads started. But once started, the cartridge glided in smooth as could be. I had no problem threading in the other side (the lock ring). I figured threading the cartridge into the drive side of the bottom bracket can be a little bit harder, because you have to line up the whole cartridge. I even uninstalled and reinstalled it, though the second time the threads grabbed sooner. Based on all that I have read on this board, I borrowed my friends torque wrench to get the right amount of torque. Is this typically how a bottom bracket installation goes?
Fairly Typicalgrzy
Sep 17, 2002 3:29 PM
One thing you want to be aware of is that sometimes the bolt used to secure the cable guide in place under the BB can be a tad too long. The result is that it pushes up slightly on the BB shell making it difficult to start the threads. It's kind of subtle and tricky, but an easy way to mess up the threads on otherwise fine components. A tip off is scrape marks on the label fixed to the BB shell. Back the cable guid bolt out a bit, or grind/file down or you can add an extra washer if you're in a hurry. The torque wrench is highly advised. Also, back out the self extracting one key removal bolts with a pin wrench (or needle nosed pliers) and install the crank arms w/out the bolts until you get a feel for getting the splines aligned correctly. It's *very* easy to destroy them through improper installation and not know it until later. Don't forget about the funky little washers - they're important. I've taken to not even using the one key release mechanism - they can strip the threads out of a crank arm if not turned all the way in. Kind of a bummer.

Remember: Never force anything mechanical (unless you're really mad at it and then just use a bigger hammer).
Thanks, and...turtlehead
Sep 18, 2002 4:30 AM
I checked the old cartridge and there were no scrape marks on it. Also, when I re-installed the cartridge the second time, I check the threads in the bottom bracket and those on the cartridge and the threads were fine. I used a flashlight to make sure I was lining up the splines correctly. Thanks for the tips.
cable guide bolt - yes indeedydotkaye
Sep 18, 2002 8:10 AM
I once spent over an hour failing to start the threads on a new BB, because it was slightly fatter around the middle than the original DuraAce: so the cable guide bolt would push it out of alignment about 2 threads into the shell..
Juryrigged a washer for the bolt out of some plastic lying around the garage, and the BB went in smooth as silk. Always meant to replace that washer, but I never see it, so it's still there after 2 years.