Pfaff 939 U - Lifting Stroke of the Main and Differential Feed Dogs

12 - 30
Adjustment
12.05.28 Lifting stroke of the main and differential feed dogs
Requirement
With the stitch length set at "0" and the needle bar positioned at 0.25 after t.d.c. (hole 3),
the feed dogs should be at the top of their stroke.
2
1
Fig. 12 - 29
● Adjust feed lifting eccentric 1 (screws 2) in accordance with the requirement.
Feed lifting eccentric 1 should not be axially displaced.