Baby Lock BLMY, Service Manual

Page: 87 / 226

3 - 8
Rotary hook drive mechanism / Feed and bobbin
mechanism /Cutter assy.
Main unit
1
Assembling the Lower shaft A assembly
1. Attach the retaining ring E6 to the lower shaft A
1
.
2. Attach the thrust washer
2
, lower shaft bushing
3
, thrust washer
2
and
set screw collar
4
(Face the ground surface toward the lower shaft
bushing).
3. Move the set screw collar
4
to the right and secure it with the 2 screws
1
.
1
Torque
1.47 – 1.98 N·m
Retaining ring E6 1 3
2 4 1
Set Screw, Socket (CP)
M4X4
2
Timing pulley D attachment
1. Attach the retaining ring E6 to the lower shaft A
1
.
2. Attach the timing pulley D
2
to the lower shaft A
1
, and attach the
retaining ring E6.
3. Hand start the 3 screws
1
in the timing pulley D
2
.
(Fully tighten after 4 - 8 "Needle bar rise adjustment".)
*Key point
• With the lower shaft A D cut 3 facing forward, secure using
one of the three screw holes in the timing pulley D
2
in the
forward facing position.
1
Torque
1.18 – 1.57 N·m
Face forward
Retaining ring E6
3 2
Retaining ring E6
1 (x 3)
1
1
Set Screw, Socket (FT)
M5X5
3
Joint attachment
1. Put the lower shaft bushing
1
on the lower shaft A assy.
2. Put the joint
2
on the lower shaft A assy., and hand start the 2 screws
1
(fully tighten after 3 - 9 "5 feed module attachment.)
*Key point
• Align the screw hole 3 in the joint with the D cut 4 in lower
shaft A.
1
Torque
1.18 – 1.57 N·m
2 1
3 4
1 (x 2)
Set Screw, Socket (FT)
M5X5