Duerkopp Adler 550-767 Operating Instructions Manual page 11

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HINT
The needle thread can be threaded without opening cover 1 by tying
the new needle thread to the residual needle thread and pulling it
through the thread tensioner.
Pass the thread through guide 7 and anti-clockwise around
prethread-tensioning spring-tensioner 8. Pass the thread through
guide 7 again.
Pass the thread around guide 10 and then anti-clockwise around
the main tensioner 9. Pass the thread clockwise around main
tensioner 11.
Pass the thread clockwise around the thread tensioning unit 4, past
the check spring 3 and through the guide 2.
Pass the thread through take up lever 1 and through guides 2, 5
and 6.
Pass the thread through the needle; pull out several centimetres of
thread and cut.
Pass the needle thread through the needle from the right, pull out a
few centimetres of thread and cut.
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