Pfaff 1540 - Manual (Page 28)

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9. Adjustment of feed regulator cranks on Pfaff 1520 / 1530
Requirement:
The feed regulator cranks must not have any axial play.
Check:
Move the feed regulator cranks laterally backwards and forwards (fig. 15).
Adjustment:
z Loosen the two screws 5.
z Push feeding eccentric 33 to the right against the bearing.
z Push bolt 11 to the right until connecting bar 10 is in contact with edge 34 of feeding eccentric 33.
z Tighten the screws 5.
Cross-check:
z Set the stitch length graduated dial to "6".
z Detach spring 35.
z Check the joints for easy movement and lack of play.
z Re-attach spring 35.