Originally Posted by queerpunk

you need a lockring spanner and a pin spanner. the pin spanner engages those little holes in the cup in the first picture, and the lockring spanner grabs on to the ring around it (the lockring). they are tightened against each other, with the lockring tightened against the bb shell. you want to loosen the lockring from the bb shell - then you'll be able to loosen the cup.