Brother B-500, Руководство по обслуживанию

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3 - 20
Thread tension mechanism Main unit
1-3
Assembly of Thread unit L (Attachment of Thread tension dial)
1. Insert the tension disc A
2
, the tension disc B
3
, the washer
0
, the
thread release plate
5
, the tension disc washer
6
, the washer
7
and the
spring into the shaft of the Thread unit L
1
.
*Key point
• Check that the notch part 8 of the tension disc A 2 and the
tension disc B
3
align the protrusion
9
of the Thread unit L.
2. Attach the thread tension adjusting screw
A
to the thread tension plate
0
,
and then engage the protrusion
D
of the thread tension plate
0
in the
groove
C
of the thread tension dial
B
, and then insert the tension
adjusting screw
A
into the shaft of the Thread unit L
1
, and then attach
the thread tension dial
B
to the Thread unit L
1
with the tension dial shaft
E
.
3. Attach the notched spring
F
to the Thread unit L
1
with the screw
1
.
*Key point
• Insert the tip of notched spring F into the bottom of the thread
tension dial
B
.
• Check that the boss part of the Thread unit L 1 engaged with
the positioning hole of the notched spring
F
.
1
Torque
0.78 – 1.18 N·m
S03
:
S03
A
7
5
2
1
3
6
B
E
F
1
4
F
B
1
E C 1
9
8
D
S03
Screw, Pan
M3X4
SPRING
X55842***
12.0
7.6
1-4
Assembly of Thread unit L (Attachment of Bobbin winder guide assy.)
1. Set the bobbin winder guide assy.
1
to the Thread unit L
2
, and then
tighten the screw
1
.
*Key point
• Fully tighten the screw after performing "4-18 Adjustment of
Bobbin winder".
1
Torque
0.59 – 0.78 N·m
2
1 1
Screw
3X10