–
6
–
2. Handwheel and clutch
Preparation
○ Remove belt cover.
○ Remove arm cover.
❾
Motor pulley
❻
Groove of
handwheel bushing
❽
Handwheel bushing stopper pin
❹
Angle portion of clutch spring
❼
Convex of handwheel bushing
❸
Groove of clutch spring support
Groove of handwheel
3. Thread tensioner asm.
❶
Handwheel
setscrew
❷
Handwheel
❶
Thread take-up spring
adjusting plate setscrew
SL5030801SN
❷
Thread tensioner setscrew
SM8040602TP
❸
Thread take-up spring
❹
Thread tensioner asm.
❺
Thread tension disk presser
❺
Hook portion of clutch spring
❻
Thread take-up
spring adjusting
plate
When removing motor
pulley, remove cord guide
plate setscrews
❺
and
❺
-1 in previous item.
Disassembly Assembly Point
○ Remove
❶
setscrew.
○ Lower presser foot and remove
❷
setscrew.
○ Remove
❸
spring together with
❹
thread tensioner asm. and ad-
justing plate.
○ Attach
❻
adjusting plate and
❸
spring to thread tensioner asm.
and attach it to frame. Then x it
with
❷
setscrew.
○ Tighten
❶
adjusting plate set-
screw.
○ Place upward the scale of
❺
thread tension disk presser.
○ See items 9 and 10 on page 19
for adjustment of pressure and
thread take-up spring of stroke.
Disassembly Assembly Point
○ Remove
❶
setscrew.
○ Remove cord guide plate setscrew
and remove cord guide plate asm.
○ Remove
❸
spring support.
○ Move
❹
in the direction where
clutch spring is released and re-
move clutch spring.
○ Face
❻
to motor side and
❽
is
hard to drop.
○ Draw out
❽
and remove
❾
.
○ Attach
❾
and enter
❽
.
○ Enter
❻
groove of bushing to
❽
stopper pin and attach bushing.
○ Enter
❺
hook portion of spring
to slit in the center of handwheel
bushing
○ Enter
❺
clutch spring to
❸
groove of spring support and at-
tach cord guide plate asm. Then
tighten setscrew.
○ Align
❼
convex of bushing
with
groove of handwheel
and attach handwheel. Then
tighten setscrew.
○ Clearance provided between
convex of
❸
clutch spring sup-
port and clutch plate is 2 ± 0.5
mm.
○ See item 12 on page 19 for ad-
justment.
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