Dürkopp Adler 867 Service Instructions Manual page 70

2. Setting the spring travel: Turn the stop collar (1):
3. Setting the spring tension: Turn the tension disc (3):
4. Tighten the screw (4).
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• Longer spring travel: Turn to the left:
• Shorter spring travel: Turn to the right:
• Greater spring tension: Turn to the left:
• Less spring tension: Turn to the right:
Do not twist the stop collar in doing so.
Setting needle thread tension
Service Instructions 867 - 03.0 - 10/2017