Pfaff 3827-4/33 Instruction Manual page 53

Adjustment
Raise the gauge foot 1 and dismount it.
Fit the presser foot and lower it down to touch the needle plate.
Adjust presser foot (screw 9) at the side so that the edge of the presser foot is parallel to
the bottom feed dog.
Lower lifting piece 10 as far as possible and tighten screw 9.
Screws 3 and 7 remain loosened for further adjustments.
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