Height Of The Needle Bar Linkage - Duerkopp Adler 745-34 Service Instructions Manual

2.4.7 Adjusting the height of the needle bar linkage
9 8
1 2 1
Caution: Danger of injury !
Switch off the main switch.
Check and adjust the height of the needle bar linkage only with the
sewing unit switched off.
Standard checking
For a safe engagement and disengagement of the needle bars the
needle bar linkage must be precisely set as to the needle bars.
If the two needle bars in the top dead centre are engaged, there must
be a distance of 0.2 mm between the yoke 4 and the needle bar
linkage 3.
–
Unscrew the screws 1 and take off the head cover 2.
–
Check the distance of 0.2 mm between yoke 4 and needle bar
linkage 3. A feeler gauge of size 0.2 mm must be easily movable
between yoke and needle bar. A feeler gauge of size 0.4 mm must
jam noticeably.
Correction
5
–
Unscrew the screws 1 and take off the head cover 2.
–
Slightly loosen screw 5 at the support plate.
–
Loosen the counternuts 7 and 9.
–
Set the linkage height with the screws 6 and 8 in such a way that
there is a distance of 0.2 mm between linkage 3 and yoke 4.
–
Tighten the counternuts 7 and 9.
–
Tighten screw 5 at the support plate.
–
Mount the head cover again.
7 6
4 3
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