Adjusting The Tension Of The Belt - Precor M9.21i Owner's Manual

CAUTION: Stand to the side of the treadmill.
The running belt begins moving automatically
after you press QUICK START.
CAUTION: If you hear a chafing sound or the
belt begins to tear or fray, stop the running belt
immediately by pressing the STOP key or
pulling the magnetic safety key out of the
electronic console. Contact your Precor service
representative.
Diagram 18
Running bed
Side platform
Rear roller
Belt adjustment bolt
Running belt
CAUTION: Stand to the side of the treadmill.
The running belt begins moving automatically
after you press QUICK START.
page 34
3. Insert the Safety key, turn ON the treadmill, press the QUICK START key, and then increase
the running belt speed to 3 mph (5 kph) by pressing the SPEED
4. Observe the running belt for a couple of minutes. The belt should track centered on the
running bed.
5. Press STOP to stop the running belt.
6. If the belt needs additional alignment, repeat steps 1 through 5 of this procedure until the belt
is properly aligned.

Adjusting the Tension of the Belt

Proper belt tension is important for a smooth, steady run. If your physical condition permits, test
the belt tension by jogging at 6 mph (10 kph). If the belt tension is too loose, you will feel a pause
in the belt with each footplant (step).
To adjust the running belt tension, take the following steps:
1. Make sure that the treadmill is OFF (O). If the treadmill is ON ( I ), switch it to OFF. Wait for
the running belt to come to a complete stop.
Adjusting tension of the belt
2. Standing behind the treadmill use the rear belt adjustment bolts (see Diagram 17 on the
previous page and Diagram 18). Simply turn each bolt clockwise 1/4 turn to adjust the tension
of the belt.
3. Insert the Safety key, turn ON the treadmill, answer the start-up prompts, then increase the
speed of the running belt to 6 miles per hour (10 kph) by pressing the SPEED
4. Jog on the running belt for 1 minute or more. If you feel a pause in the belt with each
footplant (step), you need to continue to adjust the belt tension.
5. Press STOP to stop the running belt.
6. Continue with steps 1 through 5 until the belt tension has been properly adjusted and you no
longer feel the pause in the belt with each footplant.
Important: Do not turn the adjusting bolts more than 1/4 turn at a time. Overtightening the
bolts can damage or cause premature failure of the precision bearings in the front and rear
rollers.
key.
key.