Brother PR600II Service Manual page 271

Adjustment
1. Loosen the 2 screws 1.
2. Loosen the 2 screws 2.
3. Move the Y tension plate assembly back and forth to adjust the Y-belt tension.
4. Tighten the 2 screws 2.
5. Repeat the same steps to adjust the Y-belt tension on the right side.
6. Tighten the 2 screws 1.
Load when the center of the Y-belt is deflected
4.3 mm
1
2
1
Y-belt tension adjustment
Set Screw, Socket (CP)
M3X3
Color; Black
Screw, Pan (S/P washer)
M4X10DB
2
2.35 - 2.55 N (240 - 260g)
Torque
0.78 - 1.18 N-m
Torque
1.18 - 1.57 N-m
3.9mm
2.35 - 2.55N (240 - 260g)
4 - 31