Bottom Bracket Help

I've just bought a new UN26 with plastic cup and also a Shimano type BB Tool.

The tool fits perfectly into the drive side cartridge itself, however it seems far too big for the plastic cup and I can only just get it to seat about 1mm.

Has anyone come across this before, do I have the wrong cup or wrong BB tool, what's going on?
 
I've had that too, my solution was to put the frame flat and put plenty of pressure on the tool whilst turning it. Slipped a bit but got it in the end.

I had a cheapish tool but it might be something else. Either way you definitely don't want it to round off the cup :)
 
Yeah, I've had similar issues.....strip the bike, ly it down and work down onto the frame for extra pressure.......
 
Here's another good tip......take a qr skewer and an aheadset top cap and run it through the spindle to allow some pressure on the edge of the tool to hold it in place as you turn it..... :wink:
 
I've got a really old BB tool that has splines at either end; one is slightly smaller than the other. Perhaps that is what would be required. Where are you? If you're near to Manchester I might be able to help you out.
 
To secure the BB tool in the BB I always use a long bolt that screws into the thread the crank bolt fits into. With a few washers and a spanner you should be able to push the tool into the splines and then use a large socket and rachet to screw the BB cups in. I find this stops the tool jumping out of the splines and rounding of the splines. This LGB's method for removing stuck BB's but I also use it in reverse to ensure the BB goes in uneventfully. This way you won't have to lay the bike down and risk damage to the paint. Also you could secure the bike in a stand if you have one.
 
technodup":3w4mrsaq said:
I've had that too, my solution was to put the frame flat and put plenty of pressure on the tool whilst turning it. Slipped a bit but got it in the end.

I had a cheapish tool but it might be something else. Either way you definitely don't want it to round off the cup :)


Got it in, in the end. As above is how I accomplished it, though would have liked a tool that fitted exactly. I'll probably end up buying another when it's time for it to come out.

Thanks for all the help, offers and good idea's. Just waiting for my cranks to arrive now :D
 
Back
Top