mike boersma wrote:
> The bottom bracket on my bike has worked loose. I would like to learn
> how to fix this problem myself, so if someone would be so kind to give
> me directions on how to fix this I would be greatful.
>
> The front chainring is a Shimano FC 6500. The bottom bracket is a
> Shimano BB 6500. What tools will I need to tighten the BB and what are
> the steps needed to tighten (or remove) the BB/ Crankarms?
Since you have an Ultegra 9-speed crank and bottom bracket, you should
have the self-extracting crank bolts (there should be an internal hex
head, surrounded by a ring that has two small holes in it). If this is
the case, you only need a hex wrench to remove the cranks.
To tighten the bottom bracket, you need a special-purpose bottom bracket
tool (such as the BBT-22) and a decent torque wrench. I use a Craftsman
wrench that lets me dial in the desired torque and then makes a "pop"
sound when I reach the dialed-in torque. Works great, no having to crane
your neck to read the torque gauge.
To reinstall the cranks, you should ideally remove the one-key release
ring from the arms, fit the arms, and tighten the crank retaining bolt
to the specified torque (you'll need a set of hex key sockets for this).
Then reinstall the release ring, using a pin spanner such as the Park SPA-2.
The torque specifications and more detailed instructions can be obtained
from Shimano's service instructions, here:
http://techdocs.shimano.com/media/t...gra/FC6500/SI-16T0B_v1_m56577569830611829.pdf
SPA-2:
http://aebike.com/page.cfm?PageID=30&action=details&sku=TL7069
BBT-22:
http://aebike.com/page.cfm?PageID=30&action=details&sku=TL7260
Mike Johnson
