Brother PR600II Service Manual page 275

Adjustment
1. Loosen the 4 screws 1.
2. Adjust the vertical position of the thread presser base.
3. Tighten the 4 screws 1.
Clearance between wiper hook top face and
thread presser cover
1
1
Thread presser base up/down position adjustment
Screw, Bind
M4X6
0 - 0.2 mm
Torque
1.18 - 1.57 N-m
clearance 0 - 0.2mm
Thread presser
cover
Wiper hook
1
4 - 35