promelectroavtomat M3000C, Service Manual, Page: 54 / 67

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22. NEEDLE THREADER
(CHECKING THE HOOK POSITION IN HORIZONTAL DIRECTION)
STANDARD
The measure from inside of the hook guard to the center point of hook is 0.42 mm.
CHECK
As sewing needle HA X1 (#14) is standard, so prepare five brand-new sewing needles HA X1 (#14) and check by
changing all of these.
After Checking,
1.
In case that, hook goes through eyelet of all needles............................ There is no problem.
2. In case that, hook does not go through eyelet of all needles................. Adjust by bending hook.
3. In case that, hook does not go through eyelet of some needles............ Needles through which the hook
does not go through are defective.
(Example for checking)
When you check five brand-new sewing needles HA X1 (#9) on condition that it achieves above first case, if the
hook does not go through eyelet of all of these needle, all five needles are defective and you judge the hook
position is not defective.
ADJUSTMENT
In case the hook is defective after above checking, adjust the hook by bending with pliers. Do not bend the hook
guard at this time.
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