|I stripped the tool slots on left Campy bb cup - now what?||BenR|
Apr 17, 2003 8:34 PM
|I've got a Chorus bottom bracket in my prized Klein quantum frame. I was attempting to replace the worn bb with a new one when I felt this sickening crunch while applying force with the wrench. Turns out I've managed to chew up the slots for the Park tool teeth in the left cup. Now how do I get this #@*%! bb out?
The tool is fine and I'm pretty sure I had it snugly embedded in the cup and held on with my crank bolt. Am I stuck with a useless bb in my frame? I'm going into the LBS tomorrow but am not sure he can do anything about it. It looks like there may be some remnants of teeth deep in the cup, deeper than the park tool extends, so maybe he will have the "real" Campy tool or at least some finesse and something to get in there deeper with.
I'm not sure what to do if that doesn't work, except keep the frame for people to snicker at.
|re: I stripped the tool slots on left Campy bb cup - now what?||ukiahb|
Apr 17, 2003 8:57 PM
|this might be a dumb question and no offense is intended, but are you aware that the LH cup has a reverse thread and is turned clockwise to loosen?? also it might be worth trying to remove the RH cup (CCW to loosen)and the BB if possible before trying to deal any further w/ LH cup, access would probably be improved and perhaps the tool can engage the slots more fully w/ the BB out.|
|got that backwards...||C-40|
Apr 18, 2003 7:36 AM
|On english threaded BBs the RH (fixed cup) is left hand threaded.
|got that backwards...||ukiahb|
Apr 18, 2003 9:52 AM
|yikes...you are right, I wasn't thinking, thanks for the correction....I should have said drive side and non drive side anyway.|
|Remove other side first||Calvin|
Apr 18, 2003 4:26 AM
|The non-drive side (left side) is right hand thread. The drive side (right side) is a left-hand thread, so it removes clockwise. Mount the tool on the drive side, and use the crank bolt and washers to hold the tool fimrly in place. There may a problem with the cup, as the threads may be seized. Use some thin lubricant in the threads before removal.|
|I think theres still hope!||the bull|
Apr 18, 2003 5:36 AM
|You could use a air hammer with a flat chisel to SLOWLY MOVE the cup off.If you dont have tools like this it is possable to make a slot in the bottom bracket and tap it off.Try not to get on the rim but more toward the spindle.GREAT CARE MUST BE TAKEN WHILE DOING THIS BECAUSE YOU DONT WANT TO DISTORT THE BB SHELL!!!!!I am not saing this will work its just something I thought of while sitting here. This is probally a good last step idea.
IF YOU DONT FEEL COMFORTABLE DOING THIS DONT DO IT!!!
TAKE YOUR TIME AND LET SOME PB BLASTER SOAK IN FROM
|Just cut one out...||merckx56|
Apr 18, 2003 6:58 AM
|If you can get the other side out, it's a relatively easy fix. The driveside is pulling on the cup you stripped, thus creating more pressure against your effort. I pulled the driveside/cartridge part of the bb out first. I then drilled small holes in the non-drive cup. A pin spanner will fit into the holes and allow you to turn the cup. OR you can, VERY carefully, slide a hacksaw blade thru the shell, re-attching it on the other side, and cut very gingerly to within a couple mm of the bb shell. The alu is very soft on Campy bottom brackets. Once you've made the cuts, a screwdriver and a few well placed whacks with a mallet will fold the alu like butter. Even if you should nick the bb shell in the frame, an english bb will still fit. If you should damage them badly, have the shop re-thread the bb shell to accept an italian bb. Italian shells are larger than english. I have cut out two of these and been successful both times.|
Apr 18, 2003 7:34 AM
|I'm left handed and thus not always the most logical fellow. I had the thread directions correct on both sides but was somehow thinking I had to get the left cup out first rather than removing the right cup to get the pressure off the left. I realized the error of my ways after I went to bed. I'll still take the bike to the shop so where there are better tools and experience.
Thanks very much for the suggestions.
|Left cup....||Rusty Coggs|
Apr 18, 2003 8:19 AM
|Nothing wrong with your thinking.Left one gets tightened last(lockring),comes off first.Always works for me....except for some cheap shimano cartridges that install from the left side for some unknown reason.|
|Update: got it out no problems||BenR|
Apr 19, 2003 9:26 PM
|Took it down to the shop and got first the right and then the left cups out. Frame is fine and did well in my race today on the new bb. Thanks again.