Nautilus T624 Service Manual page 138

23. Lift and pivot the Front Roller out of the Frame, and slide it out of the
Walking Belt. This will free the Drive Belt from the Front Roller.
24. Using a 6mm hex wrench, remove the 2 indicated screws from the
Deck.
25. Using a 6mm hex wrench, finish removing the Adjustment Bolt from
the Rear Roller.
Rear Roller
Note: be sure to record the number of turns of the Adjustment Bolt it takes
to remove it. This will assist with reassembly.
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