Master F-13 User Manual page 63

D. Auto lubrication
Add oil to the silicon cushion hole,then it will lubricate treadmill by itself.
3. Running belt tension adjustment
All treadmills' belts should be adjusted before leaving the factory and after the
installation, however, after it is used for a period, looseness may occur. For
example: when users are running, it may occur pause and slip, if which happens,
adjust the belt and bolts synchronously from both the left and right side in a
clockwise direction and with semicircle as the unit; if the running belt is too
loose, it may occur slip between the belt and the roller when treading on the belt;
but if too tight, it will be easy to increase the motor load and damage motor,
running belt, roller, etc.
4. Running belt deviation adjustment
All treadmills' belts should be adjusted before leaving the factory and after the
installation, however, after it is used for a period, it may occur belt deviation,
which is caused by the following reasons:
1. The main engine is not placed evenly.
2. The user's feet are not on the center of running belt.
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