Dürkopp Adler 550-D800 Operating Instructions Manual page 37

Operation
Fig. 21: Threading the hook thread (1)
(1) - Slot
(2) - Guide
(3) - Spring
To thread the hook thread:
1. Guide the hook thread through the slot (4) before pulling it under the
2. Pull the hook thread through the slot (1) and pull it approx. 3 cm further.
3. Align the bobbin barcode if a bobbin barcode scanner has been
4. Pull the hook thread through the guide (2) of the bobbin case
Fig. 22: Threading the hook thread (2)
(6) - Throat plate
(7) - Cutout
5. Feed the hook thread through the cutout (7) between throat plate (6)
6. Cut off the hook thread so that it sticks out 1-2 cm.
Operating Instructions 550-D800 - 01.0 - 05/2023
①
②
③
spring (3).
assembled.
retainer (5).
⑥
and hook cover (8).
(4) - Slot
(5) - Bobbin case retainer
⑦ ⑧
(8) - Hook cover
⑤
④
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