HIGHLEAD GC20618 Series, Instruction Manual Parts Catalog

Page: 17 / 54

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14
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the arm. Note
：
To adjust, loosen two thread trimmer cam clamp screws A.
23.
Adjustment of needle threads tension release assembly
a
．
Turn the balance wheel by hand until the needles reach the lowest position.
b
．
Maintaining the needle position, depress the cam follower crank and put the cam roller into the groove
of thread trimmer cam.
c
．
Turning the balance wheel by hand, adjust the thread tension release cam so that the tension disc close
when the white mark point on the balance wheel comes in line with the black mark point on the arm.
To adjust, loosen two tension release cam clamp screws A.
d
．
Opening degree of tension disc should be adjusted with the tension release roller B mounted on the
convex portion of thread release cam, as shown in Fig.
To adjust, loosen the screws C and draw the wire.
e
．
Make fine adjustment by loosening the nut D.
f
．
Loosen the nut D and make the outer casing approach rightward to increase the opening value.
24.
Adjustment of scissoring pressure of movable knife and fixed knife
a. Loosen the fixed knife bracket clamp bolt A.