Duerkopp Adler 744-122 Service Instructions Manual page 16

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–

Then set the hook shaft 6 at its highest point

with the handwheel.

Read the difference from the dial gauge.

If the result does not agree with the given

dimension for the ellipse width, the lower shaft

3 must be loosened.

The measurement can also be made with a

feeler gauge between the hook bearer 8 and

the hook drive housing 7.

–

With adjustments in the direction of the axis the

ellipse dimension changes in a ratio of 1:2, that

is, when the lower shaft is slid e.g. 0.2 mm, the

ellipse width changes 0.1 mm.

–

Remove the throat plate. Place the needle

protector 16 to the rear.

13 14

–

Loosen the set collars 15 and pulley 13.

Slide the lower shaft 3 in the appropriate

direction until the correct dimension is attained.

–

Tighten set collars 15, so that the lower shaft 3

is tight. Align and tighten the pulley 13.

–

Loosen screw 18 and one of the screws 17. By

adjusting the hook bearer 8 bring the hook

point to a distance of between 0.05 and 0.1 mm

from the needle. (Hook point behind the needle).

–

Tighten screws 18 and 17 again.

–

Check the movement of the timing belt. If

necessary adjust the lower timing belt pulley.

17 18

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