Joy Sport Marathon Owner's Manual page 27

Suggestion:
If use less than 3 hours every week,lubricate once every six months;
If use from 3 to 6 hours every week,lubricate once every three months;
If use more than 6 hours every week,lubricate once every month.
Please remember: reasonable lubricating is an important factor for extending
treadmill's life!
3. Clean
Dusts regularly after a period of use, to keep the power panel and the head of the
sensor clean.
4. Evaluation of friction
The friction between the running belt and the board will increase as dust dust collects
or lubrication reduces.It may also break the motor.Increased friction is with the
following characters:
(1) When power is turned off, the belt can't be moved or it's difficult for user to move
by foot.
(2) Motor controller will be damaged and the fuse blows.
5.Adjusting the running belt
After a period of using, the belt will be off‐centered.This may be caused by the
following reasons:
(1) The motor frame is not steady.
(2) The user is not running in the center of the running belt when using.
(3) The force on the feet is not even.
If the running belt is skewed by the user, run the treadmill without stepping on the belt
for a few minutes.If this does not work, adjust the running belt regulator with the inner
hexagon spanner, by turning it half circle once. If the running belt is near the left side,
adjust the left bolt clockwise or adjust the right bolt counter clockwise. (Look at picture
A) If the running belt is near the right side, adjust the right bolt clockwise or adjust the
left bolt counter clockwise.(Look at picture B).