Nautilus Schwinn 800IC Service Manual page 49

9. To remove the Drive Belt from the Drive Pulley, slightly pull the Drive
Belt outward while safely rolling the Drive Pulley. The Drive Belt will come
off of the Drive Pulley. Set the Drive Belt safely aside.
Be sure to keep fingers clear of all pinch hazards as
you turn the Drive Pulley.
10. Remove the Left Crank Cover from the left side of the bike.
11. Using eye protection and snap ring removal tool, remove the Snap
Ring from the Pulley Shaft Assembly on the left side.
12. Using eye protection and a rubber mallet (or wooden block and
hammer), gently strike the Pulley Shaft Assembly from the left side of the
bike until it works out of the Frame and releases the Drive Pulley with
crankshaft and Wave Washer. The bearings will stay in the frame.
13. Remove the Wave Washer from the old Drive Pulley, and place it
onto the new Drive Pulley in the same location.
Drive Pulley
Note: Please disregard the Left Crank Arm in the above image.
It was removed during an earlier step.
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Drive Belt
Snap Ring
Left Crank Cover