Pfaff 437 - User Manual

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Pfaff 437 Specifications

General

Brand	Pfaff
Model	437
Category	Sewing Machine
Language	English

Summary

Instructions for adjusting Pfaff 417 and 437 machines

Centring the needle in the needle hole (in sewing direction)

Setting the stabilizing rod parallel to the needle bar

Stitch width control

Zeroing the needle for straight stitching

Ensures the needle aligns correctly in the hole at zero stitch width.

Limiting the maximum stitch width

Sets the maximum limit for the stitch width adjustment.

Adjusting the locking lever

Adjusting the needle in the needle hole (sideways)

Adjusting the needle throw

Needle position left, centre, right

Adjusting the needle position lever

Adjusting the stitch length scale ring

Zeroing the differential feed

Zeroing the bottom feed

Zeroing the top feed motion

Adjusting the torsion springs

Torsion spring of reverse-feed control

Adjusting the bottom feed driving motion

Bottom feed lifting motion

Adjusting the hook bearing bracket

Preliminary adjustment of needle bar height

Hook timing and hook-to-needle clearance

Final adjustment of needle bar height

Adjusting the slack thread control

Clearance between presser foot and needle plate

Feed dog height

Top feed driving and connecting levers

Vibrating presser height

Vibrating presser advancing motion

Vibrating presser lifting motion

Bobbin winder

Position of bobbin case opener

Oil check valve

Tension release mechanism

Hook lubrication

Knee lever stroke limitation

Thread check spring and thread regulator

Presser foot pressure

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