-27-
Fig.40
Fig.41
1.Removing the stationary trimmer
1) Lay down the sewing machine head.
2) crew off screw
①
, and remove positionin
-g hook
②
of rotating hook.
3) Screw off screw
③
, and take out stationa
-ry trimmer
④
.
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
-er supply before the operation is co
-nducted.
2.Carry out the above steps in rever
-se to install the fixed knife.
④
⑤
⑥
⑦
⑨
⑩
⑧
2.Grinding the stationary trimmer
If the cutting performance deteriorates,Sh
-arpen the fixed knife
on a whetstone as Sh
④
-own in the illustration
.
⑤
3.Removing the movable trimmer
1)Remove the needle.
2)Uplift the presser foot using foot lifting le
-ver.
3)Screw off screw
⑥
(2 pieces) , and take o
-ut Clearance hole plate
ASM
.⑦
.
4)Turn the handwheel to allow the needle b
-ar to reach its highest position.
5)Lay down the sewing machine head.
6)Push thread-trimming driving crank lever
⑧
in direction of arrow till the position of scre
-w
⑨
is exposed.
7)Screw off screw
⑨
(2 pieces), and take o
-ut movable trimmer
⑩
.
Caution:
1.To prevent the unexpected startup
of sewing machine, trim off the pow
-er supply before the operation is co
-nducted.
2.Carry out the above steps in rever
-se to install the movable knife.
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