Brother PE-300S, Service Manual

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22 NEEDLE THREADER (CHECKING THE HOOK POSITION IN VERTICAL
DIRECTION)
ADJUSTMENT
1.
Loosen positioning supporter screw.
2. Raise and lower the positioning supporter very slightly and check that there is 0mm clearance between top of
hook and top of needle eye.
(a) When hook point is too high
Lower positioning supporter a tiny bit.
(b) When hook point is too low
Raise positioning supporter a tiny bit.
3. Tighten positioning supporter screw.
4. After making adjustments, make sure that positioning supporter (a) and needle bar clamp (b) are parallel
with each other as shown in the diagram below.
5. Readjust if not parallel.
* If positioning supporter and needle bar clamp are not parallel with each other:
The threading guide will not be held by the positioning supporter, so the lever will not move and thread the
needle even if needle threader lever is in lowest position. (figure 1) If this is the case, loosen positioning
supporter screw, move the positioning supporter slightly to the left to make it parallel.
Furthermore, if positioning supporter is turned to far to the left so that it is not parallel, positioning supporter
may come into contact with the threading guide and could result in damage to the needle threader, or could
even have a negative impact on other parts around the needle bar which could lead to possible damage to
the sewing machine itself. (figure 2) If no parts have been damaged, loosen positioning supporter screw, and
move positioning supporter slightly to the right to make it parallel.
Figure 2
Top of hook
Positioning supporter
Needle bar clamp
Parallel
Figure 1
Positioning supporter Treading guide
Top of needle eye
(b)
(a)
0mm