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2. Handwheel and clutch
Preparation
™ Remove belt cover.
™ Remove arm cover.
When removing motor
pulley, remove cord guide
plate setscrews 5 and 5 -
in previous item.
Disassembly
™ Remove 1 setscrew.
™ Remove cord guide plate set-
screw and remove cord guide
plate asm.
™ Remove 3 spring support.
™ Move 4 in the direction where
clutch spring is released and re-
move clutch spring.
™ Face 6 to motor side and 8 is
hard to drop.
™ Draw out 8 and remove 9 .
3. Thread tensioner asm.
Disassembly
™ Remove 1 setscrew.
™ Lower presser foot and remove 2
setscrew.
™ Remove 3 spring together with
4 thread tensioner asm. and ad-
justing plate.
7 Convex of handwheel bushing
9 Motor pulley
1 Handwheel
setscrew
2 Handwheel
™ Attach 9 and enter 8 .
™ Enter 6 groove of bushing to 8
stopper pin and attach bushing.
™ Enter 5 hook portion of spring
to slit in the center of handwheel
bushing
™ E n t e r 5 c l u t c h s p r i n g t o 3
groove of spring support and at-
tach cord guide plate asm. Then
tighten setscrew.
3 Thread take-up spring
4 Thread tensioner asm.
5 Thread tension disk presser
2 Thread tensioner setscrew
SM8040602TP
™ Attach 6 adjusting plate and 3
spring to thread tensioner asm.
and attach it to frame. Then fix it
with 2 setscrew.
™ Tighten 1 adjusting plate set-
screw.
!0 Groove of handwheel
3 Groove of clutch spring support
8 Handwheel bushing stopper pin
Assembly
1 Thread take-up spring
adjusting plate setscrew
SL5030801SN
Assembly
6
–
–
6 Groove of
handwheel bushing
5 Hook portion of clutch spring
4 Angle portion of clutch spring
Point
™ Align 7 convex of bushing with
!0 groove of handwheel and at-
tach handwheel. Then tighten
setscrew.
™ Clearance provided between con-
vex of 3 clutch spring support
and clutch plate is 2 ± 0.5 mm.
™ See item 2 on page 9 for ad-
justment.
6 Thread take-up
spring adjusting
plate
Point
™ Place upward the scale of 5
thread tension disk presser.
™ See items 9 and 0 on page 9
for adjustment of pressure and
thread take-up spring of stroke.
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