Short thread cutter (KFA)
74 Service Manual 867 Version 02.0 - 04/2015
The height of the thread-pulling knife is determined by the height of the
counter-blade. The upper edges of the two knives must be on the same
level.
Thread-pulling knife position
The thread-pulling knife (1) cannot be moved on the knife carrier (3).
Therefore, the cutting pressure does not have to be set after replacing the
thread-pulling knife (1).
The knife carrier (3) can be installed in 2 different positions: Large hook
and XXL hook. To do this, the knife carrier (3) is rotated by 180°.
In rest position, the thread-pulling knife (1) completely covers the cutting
edge of the counter-blade (2). This prevents the needle thread from being
damaged.
The pivot range of the thread-pulling knife is 23°.
Fig. 60: Control cam
The control cam (5) is designed for operating with the large hook and the
XXL hook.
The control cam (5) can be on the right-hand side (label is right side up)
or on the left side (label is upside down) of the clamping ring (4).
The control cam (5) makes contact with the clamping ring (4).
The label of the control cam (5) is correct in accordance with the installa-
tion situation.
(4) - Clamping ring (5) - Control cam
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