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9
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9. Stitch dial
Preparation
○ Remove arm cover asm.
10. Thread trimming switch case
Preparation
○ Remove arm cover asm.
○ Remove motor cover and belt cover.
○ Remove motor mas. asm.
❶
Thread trimming switch
circuit board case setscrew
SL4040655SN
❸
Feed regulating screw
stopper asm. setscrew
❺
Feed regulating screw
• Stopper screw
• Stopper nut
❷
Feed regulating
pin
❶
Stitch dial setscrew
SM8030402TP
❹
Feed regulating screw
Disassembly Assembly Point
○ Loosen two
❶
setscrews and re-
move the dial.
○ Be careful since
❷
pin jumps.
○
❸
may not be removed.
(Stopper screw SM8031400TP)
○ Turn regulating
❹
screw full to
the right.
○ Assemble stitch dial with its scale
0 up and tighten
❶
screw (2
pcs.).
○ There should be no play in feed
regulator when operating lever.
(When scale is 0.)
○ Loosen
❺
stopper nut. Make
stopper screw strike against reg-
ulating
❹
screw and tighten nut.
Disassembly Assembly Point
○ Remove two
❶
setscrews in
thread trimming switch case.
○ Remove thread trimming switch
case.
○ Attach the switch case to frame
and tighten with
❶
setscrews.
○ There should not be no torsion
between switch and frame.