Needle Bar Case Final Assembly Attachment - Brother PR655 Service Manual

Main unit
12

Needle bar case final assembly attachment

1. Rotate the pulley until the base line on the pulley is at the top.
2. Apply MOLYKOTE EM-30L to the roller 1 of the thread take-up
differential lever.
3. Attach the needle bar case final assembly to the case bracket assembly with
the 4 screws 1.
*Key point
• Align the thread take-up boss b on the thread take-up lever
assembly with
align the thread take-up boss c with the roller
thread take-up differential lever.
• Align the case guide D a with the case positioning plate
assembly
A
4. Move the case positioning shaft assy 2 on the case positioning plate
assembly toward you, and firmly tighten the nut (2, M4) 3.
5. Adjust the vertical position of the thread take-up differential lever so that
the needle bar case final assembly lightly moves right and left. Firmly
tighten the screw 2.
Apply MOLYKOTE EM-30L to the roller of the thread
take-up differential lever.
Tightening torque of nut (2, M4):
1
2
Needle bar unit
on the case guide UL assembly, and then
B
Bolt, Socket
M4X16
Bolt, Socket
M5X12
3 - 58
C on the
1
Size of a grain of
rice
1.18 - 1.57 N-m
Torque
1.18 — 1.57 N-m
Torque
2.94 — 3.43 N-m
1
2
3
2