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Setting the spool housing lifter
12 Setting the spool housing lifter
Figure 40: Spool housing lifter
The hook pulls the needle thread through between the nose of the spool
housing (3) and the recess in the throat plate (4).
The spool housing lifter (2) now pushes the spool housing (1) away so
that a gap appears for the thread.
If the hook tip is located below the spool housing lifter, then the spool
housing lifter must open so that the thread can also slide past in that posi-
tion.
So that the thread can slip through without a problem, the width of the lift-
ing gap and the point in time of opening have to be set.
Faults caused by an incorrect setting:
• Thread breakage
• Formation of loops on the bottom side of the seam
• Loud machine noise
Service manual H867 Version 00.0 - 08/2013
(1) - Spool housing
(2) - Spool housing lifter
(3) - Nose of the spool housing
(4) - Recess in the throat plate
53
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