Precor 904 Treadmill User Manual


 
page 26
To align the running belt, take the following steps:
1. Insert the locking pins to secure the handrails in an upright position.
2. Walk on the treadmill while holding onto the handrails for balance.
3. If you haven’t already done so, set the elevation of the treadmill and adjust
the micro-adjustment knob so that you can keep your momentum while
walking on the treadmill without pushing off of the handrails. Refer to the
sections,
Adjusting the Elevation Tube
to change the height adjustment
pins and
Using the Micro-Adjustment Knob
to use the micro-adjustment
knob.
4. While walking on the running belt, observe (for a few minutes) how it
tracks along the deck. If you see that the running belt is noticeably off
center or moves toward either flywheel, adjust the alignment of the belt.
Use the supplied hex key (E) to turn the adjustment bolts (located at the
rear of the treadmill). See Diagram 17.
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.
5. 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.
6. 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.
7. 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. Continue steps 6 and 7 until the belt tracks centered on the deck.
Diagram 17
Turning the adjustment bolt to
align the running belt.
Rear roller
Deck
Running belt
Belt adjustment bolt
Side rail
CAUTION: Be sure to grasp
the handrails 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.