Adjust Motor Belt - JLL S400 Manual Book

Adjust Motor Belt

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fter a period of time, the user will feel there is a pause sensation whilst running. That may be due to a
loose drive belt, so adjust the motor belt would be necessary. First of all, you have to check if it is loose
following the steps below:
Check If The Motor Belt Is Loosen
1. Unplug the treadmill.
2. Remove the motor cover by unscrewing the bolts on each side. You will see the motor located on the left
hand side of the treadmill.
3. The easy way of checking is by touching the drive belt to feel if it is slack. If you can wiggle the belt up and
down, means that the drive belt is loose.
4. Another way of checking is setting the speed at 2-3 km/h. Walk on the machine and try to stop the running
belt with your feet while holding the handrails and pulling your body on the opposite direction. If the motor
pulley stops and the front drive roller keeps running means that the motor belt is loose and it needs to be
tightened.
Tight The Running Belt:
1. Power off.
2. Locate the four bolts holding the motor.
3. Loosen those four bolts, but do not remove them.
4. Locate the long tensioning bolt that goes from the front edge of the treadmill to the front edge of the motor
pallet. NOTE: You should remove the plastic cover to have access to the long tension bolt.
5. Use an Allen key in a clockwise sensation to tighten the tensioning bolt just enough to remove the slipping.
6. Check the tension on the belt.
7. Power on the machine and check if the motor belt is still loose.
NOTE: DO NOT tight the motor belt too much, it will cause the motor shaft to snap.
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