Brother BC800, Service Manual

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Needle-presser unit Main unit
3
Lock nut attachment
1. Attach the screw
1
to the lock nut
1
.
*Key point
• Screw 1 the screw in half way.
2. Attach the screw
1
to the base holder assembly.
*Key point
• Tighten the screw until the lock nut
1
contacts the base
holder assembly.
1
1
1
1
Set Screw, Socket (CP)
M4X12
Color; Black
4
Thread release lever attachment
1. Apply a bead of EPNOC AP (N) 0 to the caulking shaft
2
of the base
holder assembly
1
.
2. Attach the thread release lever
3
and the spring
4
to the caulking shaft
2
of the base holder assembly
1
, and then attach the retaining ring (CS4).
*Key point
• Position the tip of the spring at the top, and align the spring
with the hole on the thread release lever
3
.
• Secure 0.2 mm between the thread release lever 3 and the
base holder
5
.
Apply EPNOC AP (N) 0 to the caulking shaft of the
base holder assembly. Bead
XC8387***
1
2 4
3
1
4
3
Retaining ring CS4