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Nautilus® Sport Series Treadmill Service Manual
MECHANICAL SERVICE GUIDE
2-8 Slide the drive belt off the pulley on the end of the
motor shaft.
2-9 Trace the wires going from the motor to the motor
controller (see Figure 5). Unplug the red and black
wires that connect to the motor controller and
remove the Phillips head screw that attaches the
green ground wire to the mounting plate to the
treadmill motor pan (see Figure 5A).
2-10 Slide the motor towards the belt, then lift the
motor out.
NOTE: Depending on the motor type
(manufacturer) Steps 2-11, 2-12 and 2-13)
may be omitted.
2-11 Remove the motor pulley and flywheel with a 3/16
inch Allen wrench (see Figure 6). Remove the
plastic fan by removing the clamp (see Figure 6A)
and twisting the fan off the motor shaft.
2-12 Install the flywheel, pulley and plastic fans to the
motor shaft.
NOTE: Do not tighten the flywheel/pulley at this
time.
2-13 Install the motor and slide the drive belt onto the
motor pulley and align the motor pulley with the
front roller pulley. Tighten the motor pulley with a
3/16 inch Allen wrench.
- OR -
2-14 Slide the (4) 1/2 inch bolts up through the bottom
of the motor pan, through the motor base and
attach the (4) nuts. DO NOT TIGHTEN. Install the
motor tension bolt and using a 1/2 inch wrench
tighten until the drive belt fits with little or no
slack on the front roller. At this point, tighten the
(4) bolts at the motor base.
Figure 3:
Figure 4:
Figure 4A: