Precor 9.31 Manual page 52

16. Slowly rotate the drive motor flywheel while pressing the drive belt onto of the drive roller
pulley. Continue until the drive belt "walks" completely onto of the drive roller pulley. Be sure
that the drive belt is fully onto and correctly aligned on the drive roller pulley.
17. Slide the take up roller into the running belt and set it in its mounting position. Hand start
both take up roller mounting bolts that were removed in step 2.
18. Alternate tightening the two take up roller mounting bolts, in order to tighten both ends
evenly, until both running belt gauges again read exactly 3.5% on consumer treadmills or
3.55% on commercial treadmills.
19. When both gauges again read 3.5 or 3.55% the belt is at its original tension. It will now be
necessary to touch up the running belt tracking, however if this procedure was carefully
followed, the belt tracking should be very close.
20. Remove both belt gauges from the running belt.
21. Start the treadmill and operate it at 2 m.p.h. Observe the running belt. If the belt drifts away
from its centered position re-track it by adjusting the take up roller mounting bolts as
described in step 21.
22. If the belt drifts to the right, slowly turn the right hand mounting bolt clockwise until the
drifting stops. If the belt drifts to the left, slowly turn the left hand mounting bolt clockwise
until the drifting stops. Only a very small adjustment should be required, 1/8 to 1/4 turn.
23. Increase the treadmill speed to 4 m.p.h., if the belt drifts away from center, touch up the
tracking as described in step 23.
24. If the belt drifts to the right, slowly turn the left hand mounting bolt counter-clockwise until
the drifting stops. If the belt drifts to the left, slowly turn the right hand mounting bolt counter-
clockwise until the drifting stops. Only a very small adjustment should be required, 1/8 to
1/4 turn.
25. Increase the treadmill speed to 8 m.p.h., if the belt drifts away from center, track it as
described in step 21.
26. Increase the treadmill speed to maximum, if the belt drifts away from center, track it as
described in step 23.
27. Set the treadmill at a comfortable running speed and run on the treadmill for a couple of
minutes and note the running belt tracking. If required track it as described in step 21.
28. If applicable, replace the finger guard removed in step 2.
29. Replace the end caps and motor cover removed in step 1.
9.31, 9.33, 9.35 Treadmill
Page 52