Motus M990T, Service Manual

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2.4 How to Adjust Motor Drive Belt Tension
The tension of Motor Drive Belt (M3, Poly-V Belt) can be loosened by a long time use and it can
cause a slip between The Drive Motor Pulley and Motor Drive Belt. The tension is corrected by
adjusting the mounting position of the Drive Motor (M1).
Do the steps below while referring to the following Exploded Views in Appendix.
A.1 M990T
B.1 MAIN BODY_FRONT A
C.1 MAIN BODY_REAR
1) Stop the treadmill after lifting up the unit at maximum by operating Incline Motor.
2) Turn off the unit power at the switch at the state of the treadmill lifted-up and then unplug the
line cord at wall outlet.
3) Remove three bolts (B20) and then lift Motor Cover (T1) out from between the upright
Supports.
4) Loosen four nuts (N2) securing the Drive
Motor (M1) by one or two turns to allow the
Drive Motor to be moved by the Tension
Bolt (B7).
5) Turn the nut (N3) in the direction of arrow
‘1” to allow adjusting the tension on the
Drive Motor Belt by using the Tension Bolt
(B7).
6) Turn the Tension Bolt (B7) in 1/4 turn in
the direction of arrow ”2” to move the Drive
Motor (M1) toward the outside of the unit,
and then measure the tension of the Belt..
Note: One turn of the Tension Bolt makes
the Drive Motor move by 1.5 mm. Keep in
mind that tightening the Tension Bolt too
much can damage the internal bearings
of the Drive Motor or Front Roller
.
7) When the tension reaches 160 Hz,
secure two nuts (N2) diagonally.
Note: It is desirable to set the tension to
150Hz before tightening two nuts (N2)
1
2