Brother NV4000D Service Manual page 139

Main unit Needle-presser unit, needle threader unit, upper shaft unit
6
Upper shaft cover attachment
1
1. Attach the upper shaft cover 1 to the arm bed with the screw 1.
Torque
Screw, Bind
1
M4X6 ·
0.79 – 1.18 N m
1
Color; Silver
3 - 7