Th Motor Assembly Attachment - Brother PR655 Service Manual

Main unit
1

TH motor assembly attachment

1. Attach the base plate assembly 2 to the thread guide base 1 with the 2
screws 1.
*Key point
• Firmly tighten the 2 screws 1 after completing 4 - 27 "Needle
threader (up/down)."
2. Attach the TH motor assembly 3 and the 2 spacers 4 to the base plate
assembly 2 with the 2 screws 2.
3. Paint the thread motor's connector red.
4. Attach the lead wire guide 5 to the thread guide base 1 with the 2 screws
3.
1
2
3
2
Rack assembly and hook holder link attachment
1. Attach the hook holder link 1 to the rack assembly's shaft, and then attach
the retaining ring E3.
2. Apply MOLYKOTE EM-30L to the gear face 2 and the connecting face
on the rack assembly, and the hook holder shaft attachment hole 3 on the
hook holder link 1.
3. Attach the rack assembly to the base plate assembly's 2 shafts, and then
attach the 2 retaining rings E4.
4. Attach the needle thread sensor assembly 4 to the base plate assembly
with the 2 screws 1.
Apply MOLYKOTE EM-30L to the gear face and the
connecting face on the rack assembly, and the hook
holder shaft attachment hole on the hook holder link.
1
Needle thread unit
Screw, Pan (S/P washer)
Hand start
M4X8
Screw, Pan
0.78 — 1.18 N-m
M3X6
Screw, Pan
0.78 — 1.18 N-m
M3X4
Size of a grain of
Screw, Pan (S/P washer)
0.59 — 0.78 N-m
M3X6
3 - 72
1
2
3
Torque
5
Torque
3
Torque
rice
Torque
Retaining rings E4
2
4
1
4
2
2
1 3
4 1