HIGHLEAD GC20618 Series, Instruction Manual Parts Catalog

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h) After the completion of adjustment, fully tighten the screws A , B and C.
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At this time make certain that needle can enter the
feed dog needle hole at the center of the hole.
17
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Safety clutch device:
Safety clutch device is installed to prevent the hook
and cog belt from damage in case the thread is
caught into the hook when the machine is loaded
abnormally during operation.
(1) Function of safety clutch.
a) When the safety clutch acts, the cog belt pulley will be
unloaded. then the rotation of hook shaft will stop.
The arm shaft only will rotate. Stop the operation of machine.
b) Clean the thread thoroughly which is caught into the hook.
c) Turn the cog belt hub by hand, and check whether the hook
Shaft rotates lightly and properly, place the clutch device as
follows.
(2) How to set the safety clutch.
a) While pressing down the push button on the opposite side
of bed by left hand, turn the balance wheel slowly by right
hand away from you as shown in the figure.
b) The balance wheel will stop by the gear plate,
but turn the balance wheel more firmly.
c) Release the push button.
d) As shown in the Figure, the safety clutch device is set.