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Nautilus® Sport Series Treadmill Service Manual
MECHANICAL SERVICE GUIDE
Figure 3:
1-6 Loosen the (4) nuts on the Motor base using a 1⁄2 inch
wrench from the underside of the motor pan. Using a
7/16 inch wrench loosen the nut of the “Motor tension
bolt” located on the front of the motor (Figure 5). Do
not unscrew it all the way, loosen the motor to get
enough slack in the drive belt to slide the belt off the
motor shaft pulley.
Note: Removal of the bracket upright support (Figure
6) may help in the completion of Step 5, but is
not required.
1-7 Remove the drive belt from the roller pulley and slide
the roller out.
1-8 Replace the roller and re-assemble in reverse order
from Step 1-4 to Step 1-7.
1-9 Replace the motor cover first, then replace the lower
outer plastics using (4) Phillips head screws per side,
and the lower inside upright plastics using (4) Phillips
head screws, per side.
1-10 Check for proper belt tension following the Walking
Belt Tension Adjustment and Tracking Adjustment in
the Appendix 3.
Figure 4:
Figure 5:
Figure 6: