Nautilus Schwinn 800IC Service Manual page 29

Note: Your machine may not match the images provided exactly.
1.
Unplug the AC Adapter from the wall outlet and machine.
Keep the flywheel stable during this procedure. Do not turn
the crank arms. Flywheel movement can pull fingers in and
cause injury.
2. Using a #2 Phillips screwdriver, loosen and remove the hardware that
attaches the Fender to the Main Frame. Set the hardware safely aside for
reassembly.
NOTICE: Hold the Fender so that it does not fall.
3.
Loosen the Resistance Knob to the minimum resistance setting.
4.
Using a small (2-3mm) steel pin and hammer, push the Roll Pin out
of the Collar and Resistance Adjustment Shaft. You may need to push
down slightly on the Resistance Knob at the same time.
5.
Turn the Resistance Knob in the direction to increase resistance
until the tip of the threaded Resistance Adjustment Shaft comes out of the
Resistance Nut.
Fender
Resistance Adjust-
ment Shaft
29
Resistance Knob
Roll Pin
Collar
Resistance Nut