Wednesday, 2 September 2015

Adjusting Belt Tension on Nautilus Gym Treadmills

Adjust the belt tension whenever the belt slips or moves unsteadily during operation by following the
steps below:
1.  Start by loosening the two (2) adjustment bolts (see Figure 1).

2.  With the walking belt loose, place two marks 35 inches (89 cm) apart on each side of the belt
near the edge. The belt must be loose enough for you to move it from side-to-side on the front or
rear roller (see Figure 2).
3.  Turn the adjusting bolts clockwise by equal amounts until the marks are between 35-3/16 inches
and 35-5/16 inches apart. Proper tension for the walking belt is between .5%–.6%. This should
be about six full turns of each adjustment bolt from the point where the belt begins to stretch.
Important: Do not exceed 35-5/16 inches.

DO NOT OVERTIGHTEN THE WALKING BELT. DO NOT TORQUE ADJUSTMENT SCREWS BEYOND 80 IN-LBS (9 N-M) MAXIMUM.  OVERTIGHTENING THE BELT WILL REDUCE BELT LIFE AND DAMAGE THE ROLLER BEARINGS.

4.  Test the belt by running on the belt at about four (4) mph.  Hold the handrail lightly and resist the belt movement with your feet.

DO  NOT  USE  ALL  YOUR  WEIGHT  TO  RESIST  THE  BELT  MOVEMENT.  TOO  MUCH RESISTANCE APPLIED TOO LONG (MORE THAN TWO SECONDS) MAY SHUT DOWN THE SYSTEM. (VARIOUS ERROR MESSAGES WILL APPEAR IF THIS OCCURS. CYCLE POWER TO RESUME NORMAL OPERATION.)

5.  If you feel the belt slip on the front roller, increase the tension of each adjustment bolt by 1/2 turn
and re-test. If you feel the belt slip again, check the tensioner adjustment.

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