Schwinn AC Power Service Manual page 25

10. Use a 8mm hex key to remove both the right (shown) and
left side crank arm bolts.
11. Thread a crank puller tool with the larger 16.5mm tip into
the crank arm, then use the tool to pull the crank arm off
the bottom bracket.
12. Repeat on user left.
13. Insert a BB-18 bottom bracket removal tool into the user
right side of the bottom bracket. Use a rubber mallet to tap
the tool into place, ensuring that the teeth of the tool are
properly seated.
14. Turn clockwise to loosen the bottom bracket, then remove
the bottom bracket cartridge.
Page 25