Brother PR600II Service Manual page 260

Adjustment
1. Loosen the screw 1.
2. Move the tension pulley right and left to adjust the timing belt tension.
Timing belt deflection when a load of approx.
1.96 N (200 g) is applied to the center of the
timing belt
3. Tighten the screw 1.
1
1.96N (200g)
4 - 20
Timing belt tension adjustment
Screw, Pan (S/P washer)
M4X10DB
1
3.0 - 4.0 mm
Torque
1.18 - 1.57 N-m
3.0 - 4.0mm