Adjusting The Motor Belt Tension - Janome MB-7e Service Manual And Parts List

3 mm
Stud bolt
Setscrew

Adjusting the Motor Belt Tension

Motor belt
Push-pull gauge
Motor
1. Remove the spool stand, head set right cover and
left cover (see pages 4 to 6).
2. Place a scale under the stud bolt. Set the push-pull
gauge in line with the scale as illustrated and push
the timing belt. The gauge should read 300 grams
when the belt deflect 3 mm.
3. If the belt tension is too tight or loose, slightly loosen
setscrews (3 pcs.) and move the motor in the direction
of the arrow to adjust the belt tension.
Tighten the setscrews (3 pcs.) securely and check the
tension again.
4. Attach the parts removed in step 1.
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