Spirit CT900 Owner's Manual page 29

TREADBELT TRACKING ADJUSTMENT:
The performance of your treadmill is dependent on the frame running on a reasonably level surface.
If the frame is not level, the front and back roller cannot run parallel, and constant belt adjustment
may be necessary.
The treadmill is designed to keep the tread-belt reasonably centered while in use. It is normal for
some belts to drift near one side while the belt is running with no one on it. After a few minutes of
use, the tread-belt should have a tendency to center itself. If, during use, the belt continues to move
toward one side, adjustments are necessary.
TO SET TREADBELT TRACKING:
A 10 mm Allen wrench is provided to adjust the rear roller. Make tracking adjustments from the left
side only. Set belt speed at approximately 3 to
5 kph.
Remember, a small adjustment can make a
dramatic difference!
Turn the bolt clockwise to move the belt to the
right. Turn the bolt only a 1/4 turn and wait a
few minutes for the belt to adjust itself.
Continue to make 1/4 rotation turns until the
belt stabilizes in the center of the running deck.
The belt may require periodic tracking adjustment depending on use and walking/running
characteristics. Some users will affect tracking differently. Expect to make adjustments as required
to center the tread-belt. Adjustments will become less of a maintenance concern as the belt is used.
Proper belt tracking is an owner responsibility common with all treadmills.
ATTENTION:
DAMAGE TO THE RUNNING BELT RESULTING FROM IMPROPER TRACKING /
TENSION ADJUSTMENTS IS NOT COVERED UNDER THE SPIRIT WARRANTY.
Unplug treadmill before performing any maintenance.
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