Nautilus T624 Service Manual page 137

18. Using a #2 Phillips screwdriver remove the 2 indicated screws from
the MCB Cover and remove it.
19. Be sure to observe the distance from the Speed Sensor to the Drive
Pulley. This distance affects the effectiveness of the Speed Sensor, and
can easily be shifted accidentally during replacement procedures.
20. Using a 6mm hex wrench, loosen the indicated screws on the Motor
Mount.
21. Using a 13mm Open Ended Wrench, rotate the Belt Tensioner Screw
enough to remove the Drive Belt from the Motor.
Note: to assist with reassembly, be sure to record the number of threads
exposed before loosening.
22. Using a 6mm hex wrench, remove the indicated screw from the Front
Roller.
Belt Tensioner Screw
137
MCB Cover
Drive Belt
Drive Pulley
Motor
Mount
Front Roller
Speed
Sensor