– 14 –
Disassembly
Loosen pin setscrew of 1.
Pull solenoid link A of 2 to the right
and remove it from solenoid shaft.
Remove two setscrews of 3 and take
thread trimmer solenoid.
Assembly
™ Attach thread trimmer solenoid
and temporarily tighten it with
setscrews 3.
™ Contact thread trimmer solenoid
pin and shaft with each other.
™ Attach thread trimmer solenoid
link B. (E-ring)
™ Fix thread trimmer solenoid pin in
the center of shaft.
(See item 2 on page 21 for the
adjustment.)
Point
™ Position of thread trimmer
solenoid : move thread trimmer
solenoid mas. asm. to the left and
right so that moving knife arm 4
comes in close contact with
moving knife roller arm 5 when
the solenoid performs suction and
securely tighten 3.
Looper and thread release
function should not obstruct the
suction when the solenoid
performs suction.
3. Thread trimmer solenoid mas. asm.
Preparation
™ Remove arm cover asm.
™ Remove bed cover asm.
™ Remove thread trimmer solenoid link B.
(See 2 of the previous item.)
4. Moving knife base mas. asm.
Preparation
™ Remove bed cover.
™ Remove throat plate asm .
Disassembly
Remove E-ring of 1 and raise frame.
Remove two setscrews of 2.
Bring feed dog of 3 to its highest
position.
™ Raising moving knfe base by
hand, lightly press moving knife
link A from upper side.
(Release coupling.)
Assembly
™ Attach moving knife base to frame
while setting moving knife base to
moving knife link A.
™ Temporarily tighten setscrews
2.
™ Push moving knife base in the
direction of right front 45˚ and
securely tighten it.
™ Tilt frame, set moving knife link
shaft A and enter E-ring 1.
Point
™ When assembling, it is better to
raise by finger moving knife link
A from below.
1 Moving knife link
shaft A E-ring
2 Moving knife
base mas. asm.
setscrew
SM4040855SP
3 Feed dog
3 Thread trimmer solenoid
mas. asm. setscrew
SM5050855SN
1 Thread trimmer solenoid pin setscrew
SM8050602TP
5 Moving knife roller arm
4 Moving knife arm
2 Thread trimmer
solenoid link A
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