Opening The Thread Tension - Duerkopp Adler 69-373 Service Instructions Manual

4.

Opening the thread tension

16
3
1 mm
The needle thread tension is opened mechanically,
–
when the sewing feet are lifted with the knee lever.
Caution: Danger of injury!
Turn off the main switch.
Check and set the opening of the thread tension only
when the sewing machine is switched off.
Rule and control
Mechanical opening:
When the material presser foot is lowered, the clearance between the
release plate 3 and the release pin 4 must be approx. 1 mm.
–
Lower the material presser foot.
–
Check the clearance between the release plate 3 and the release
pin 4.
Adjustment
Mechanical opening:
–
File the release pin 4 or replace it against a new release pin.
4