Precor TRM 811.v2, Service Manual

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Running Belt Tension and Tracking Adjustment
NOTE: Proper tensioning of the belt requires the use of two tensioning gauges, Precor part
number PPP000000020007101. These must be used to ensure proper tensioning of the belt, and
proper force on the roller bearings.
Tensioning the Running Belt
1. Remove the front cover and left/right side step covers.
2. Remove the motor drive belt off the motor drive roller pulley.
NOTE: The drive motor belt must be removed to properly adjust the running belt tension.
3. Make sure that the take up roller keeper is installed.
4. Center the running belt and make sure that it is squarely positioned from the front drive roller to
rear take up roller.
5. Move the running belt so that the seam is positioned underneath the treadmill.
6. Attach a running belt tension gauge on each side of the running belt opposite each other,
avoiding interference from the side step cover brackets.
7. Slide the gauge head to set the dial needle to a coarse setting of 3. You can then rotate the
gauge dial face to fine tune the needle to precisely 3.
NOTE: Setting the gauge to a 3 reference value centers the gauge head travel al/-
movement without impeding travel
8. Alternately tighten the right/left take up roller mounting bolts so that the roller is evenly tightened
to the final 0.55% (dial 3.55) specification:
a. Incrementally and alternately tighten the left and right bolts until each gauge dial reaches a
value of 3.
b. Tighten the right bolt to dial setting 3.2, then the left bolt to 3.2
c. Tighten the right bolt to dial setting 3.4, then the left bolt to 3.4,
d. Tighten the right to dial setting 3.55 (0.55%), tighten the left to bolt to 3.55 (0.55%).