HIGHLEAD GC20618-1DZ, Instruction Manual Parts Catalog

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motion and take-up lever motion should be adjusted as follows:
（
1
）
Turn the balance wheel and stop when the take-up lever is lifed to its upper dead point.
（
2
）
Lean the machine head backward and make sure the arrow(timing mark)put on the timing belt is in
line with the black line on the boss of lower shaft.
（
3
）
If the timing mark is not in the line with the black,remove the timing belt and install it again to adjust.
19.RELATIONSHIP BETWEEN HOOK MOTION AND OPENER MOTION
（
1
）
Turn the balance wheel by hand and stop when the opener holder is located most remotely from the
throat plate.
（
2
）
Make sure the gap between the bobbin case holder
A and the opener is approximately 0.2mm.
（
3
）
If the gap is too large or small,loosen the opener
holder set screw B and adjust position of the opener.
20.RELATIONSHIP BETWEEN
NEEDLE MOTION AND FEED DOG
MOTION
（
1
）
Set feed length to “0”on the feed setting dial.
（
2
）
Lean the machine head backward.
（
3
）
Loosen the feed lifting rock shaft crank set screw
A and B.
（
4
）
Set the needle at the lowest position.
（
5
）
Adjust the distance between presser rod and
vibration prevention rod to 9mm and temporarily tighten the
feed lifting rock shaft crank set screws A and B.
（
6
）
If the connection is not at right angle,remove the
back cover,loosen screw C and move the right link to adjust.
（
7
）
After the completion of adjustment,fully tighten
the screw A,B,C.
Note:At the same
time make certain that
needle can enter the feed
dog needle hole at the
center of the hole.