Duerkopp Adler 550-12-23 Operating Instructions Manual page 6

17
Element
17 - Dip stick
18 - Screw
19 - Thread take-up lever
18
Function
- Measuring the oil level in the hook drive housing.
Dip stick is in the accessories pack.
To check the oil level screw out screw 18 and place
the dip stick 17 in the opening. The oil level must lie between
the markings. Only fill Esso "SP-NK 10"-type oil.
Attention!
If too much oil is filled the excess oil will exit through the
vent hole in screw 18.
- Automatic adaption of the hook thread quantity to the set stitch
length. Settings for firm, normal and highly elastic seams see
section 3.5.
19
9