Assembling The Lower Shaft A Assembly - Brother PE770 Service Manual

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
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 - 11 "Needle bar rising".)
*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
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 "6 feed module attachment.)
*Key point
• Align the screw hole 3 in the joint with the D cut 4 in lower
shaft A.
1
3 - 8
Rotary hook drive mechanism / Feed and bobbin
mechanism /Cutter assy. mechanism
Set Screw, Socket (CP)
M4X4
Set Screw, Socket (FT)
M5X5
Set Screw, Socket (FT)
M5X5
Torque
1.47 — 1.98 N·m 4
Torque
3
1.18 — 1.57 N·m
2
Torque
1.18 — 1.57 N·m
1 3 Retaining ring E6
2
Retaining ring E6
Face forward Retaining ring E6
1 2
1 (x 2) 1
3 4
1
1
1 (x 3)