Originally Posted by beat_pedalr

The bottom bracket I am trying to take out is on a Trek Tandem. It appears to be the same BB found on Trek's Soho model bicycle.

The bottom bracket looks like this....

I have removed the bottom bracket spindel and bearing case. The only thing left in the frame is the eccentric BB shell. I loosened/removed the main bolt but now I don't know what to do. I tried to hammer it out with a rubber mallet without success. The drive side of the shell has two hex head indentations but they don't seem to do anything. can anyone help me out with this problem?