Motor Belt Tension - Brother PE770 Service Manual

Adjustment
[Adjustment standard]
4 to 5mm slack by pushing the center of the belt with a force of 0.98N (100g).
[Adjustment procedure]
1. Remove the front cover assy..
2. Loosen the 2 upset screws (M4x12 DB) of the motor holder.
3. Adjust the motor holder up and down so that there should be 4 to 5mm slack in the timing belt when the center of
the belt is pressed with a force of 0.98N (100g).
4. Tighten the 2 upset screws (M4x12 DB) of the motor holder. (tightening torque: 1.18 to 1.57N
XC2277001
Motor holder
Upset screw (M4x12 DB)

Motor belt tension

Push-pull gauge (3N)
4 - 5mm
0.98N (100g)
· m)
4 - 7