Precor 903 Treadmill User Manual


 
page 18
To check the alignment of the running belt, take the following steps:
1. Walk on the treadmill while holding onto the handrail for balance.
2. Observe the running belt for a couple minutes.
3. If the running belt tracks off center or the belt moves toward either
flywheel, you need to align the belt.
Diagram 10
Turning the adjustment bolt to
align the running belt.
Rear roller
Deck
Running belt
Belt adjustment bolt
Side rail
4. If you see that the running belt is noticeable off center, adjust the
alignment of the belt using the supplied hex key on the adjustment bolts
(located at the rear of the treadmill). See Diagram 10.
5. If you haven’t already done so, set the incline of the treadmill and adjust
the micro-adjustment knob so that you can keep your momentum while
walking on the treadmill without using the handrail. Refer to the sections,
Adjusting the Elevation Tube
to change the height adjustment pins and
Adjusting the Resistance Level
to use the micro-adjustment knob.
Important: If you notice that the belt needs alignment, make the adjust-
ments at once. Failure to do so might cause the belt to tear or fray which is
not covered by the limited warranty.
6. While walking on the running belt, observe (for a few minutes) how it
tracks along the deck. If the running belt tracks off center or the belt
moves toward the flywheel, you need to align the belt.
7. Step off the treadmill and tighten the rear adjustment bolt on the side of
the treadmill that the belt tends to move toward. Turn the bolt clockwise
1/2 turn at a time.
Important: Do not stand on or move the running belt while you are turning
the adjustment bolt.
8. Walk on the treadmill for a few minutes to see if the belt is tracking
properly. If necessary, step off the treadmill and turn the appropriate
adjustment bolt clockwise another 1/2 turn.
9. Again, walk on the treadmill for a few minutes to see if the belt is tracking
properly. If it is still not tracking properly, loosen the rear adjustment bolt
on the opposite side 1/2 turn counterclockwise. Do not overtighten the
belt.
Caution: Be sure to grasp the
handrail while performing this
step.
CAUTION: Do not turn the
adjustment bolt more than 1/2
turn at a time. Overtightening
the bolt can damage the
treadmill.