9
Steel ball
Spring
Cheining tongue
Cover plate
10. REPLACEMENT OF CHAINING TONGUE
a) Remove needle plate.
b) Remove cover plate.
c) Watching carefully not to jump out steel ball,
remove chaining tongue and replace it.
d) You are required to check the fixing position
of the chaining tongue after replacing it.
e) Rotate stitch length dial max. 4 to rolled hem
max.4, make sure the chaining tongue is
moved smoothly to rolled hem position.
11. REPLACEMENT OF KNIVES
a) Remove upper knife and replace it.
b) Fixing screw temporaly, turn the hand pulley and bring the upper knife to
the lowest positon.
c) Adjust upper knife to be 1-1.5mm overlapping with cutting face of lower knife.
d) Tighten firmly fixing screw.
0 -0.2
1-1.5mm
UPPER KNIFE
Upper Knife Adjustment
Lower Knife Adjustment
Screw
Screw
a) Remove both knives and replace it.
b) Fix screw of lower knife temporaly.
c) Adjust lower knife to be 0-0.2mm down from surface of needle plate.
d) Tighten firmly fixing screw.
e) Replace upper knife as same as avobe.
LOWER KNIFE
Needle Plate
12.NEEDLE PLATE ADJUSTMENT
After replace Needle Plate, you are required to adjust
position of needle.
All needles and feed dogs do not touch needle plate.
Needles
Needle plate
adjusting screw