Precor TRM 885.v2 Service Manual page 89

4. There is a different belt tension specification for a new belt replacement installation and a
reinstall of an existing used belt. Verify that the drive belt tension is within the new or used belt
tension range specification. When the belt tension is not within the range specification, continue
to the next step and re-tension to OEM specification.
Drive Belt
Condition
new
used
5. Walk the drive belt off the drive motor pulley and slightly loosen the four drive motor mount bolts.
Move the drive motor (forward or backward) and adjust the belt tension.
6. Walk the drive belt onto the drive roller pulley by rotating the drive motor flywheel. Be sure the
belt is fully seated in the grooves of both pulleys and correctly aligned.
Figure 33: Drive Belt Adjustment Bolts, Drive Belt Position for Walking on
7. Run the tread at 3 mph for 1 minute to allow the belt and pulley groves to align
8. Stop the treadmill, set the treadmill circuit breaker in the off position and unplug the line cord
from the wall outlet
9. Re-attach the drive belt gauge and verify the belt tension is within specification. If not within
specification, repeat the steps above until the tension is within specification.
10. Torque the four drive motor mounting bolts to 204 inch pounds (17 foot pounds).
11. Re-install the hood.
12. Plug the line cord into the wall outlet and set the treadmill circuit breaker in the on position.
13. Check treadmill operation.
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Tension
105 lbs +/- 10 (48 kgs +/- 4.5)
85 lbs +/- 5 (39 kgs +/- 2)
Belt Tension Specification
Range
95-115 lbs (43-52 kgs)
80-90 lbs (36-41 kgs)
Page 89