Height Of The Main And Differential Feed Dogs - Pfaff 939 U Adjustment Manual

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Height of the main and differential feed dogs

.05.29
Requirement
With the stitch length set at "0" and the needle bar positioned at 0.25 after t.d.c. (hole 3):
1. The feed dogs should be in the centre of the needle plate cutout and be touching the
feed dog height adjustment gauge over their whole length.
2. There should be a distance of approx. 4 mm between the feed dogs.
Fig. 1 - 30
● lace the feed dog adjustment gauge under the sewing foot with the cutout facing down.
● Lower the sewing foot until it touches the gauge.
● Press up both feed bars and adjust the feed dogs in accordance with requirement 2.
● Adjust lifting cranks 1 (screws 2) and eccentric clamp bushings 3 (screws 4) in accor-
dance with requirement 1.
4,0 mm
1
2
4
Justierung
1
2
4
3
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