Singer 257 Service Manual

Service Manual
• Registered Trademark
FORM 723 (1172)
SINGER*
SINGER FACTORY - MONZA
Series Machine Class
The Singer Company
C) 1972 Si nger Monza
All rights reserved

Singer 257 Specifications

General

Free Arm	Yes
Presser Foot Pressure	Adjustable
Stitch Functions	Decorative
Presser Feet	Buttonhole Foot, Zipper Foot
Included Accessories	Needles, Bobbins, Screwdriver

Summary

Presser Foot Pressure Regulator

Adjustment of presser foot pressure

Procedure for adjusting the presser foot pressure.

Presser Bar Assembly

Adjustments - Presser foot height

Procedure for adjusting the presser foot height.

Needle Bar

Adjustments of needle bar height

Procedure for adjusting the needle bar height.

Needle Thread Tension

Stitch width Regulator (252-257)

Needle Position and Cam Follower Mechanism

Lateral adjustment of needle position

Procedure for adjusting the lateral needle position.

Cam Stack and Shaft (252-257)

Bobbin Winder

Stitch Length Regulator and Feed Fork

Adjustment of feed

Procedure for adjusting the feed dog's movement and position.

Rotating Hook

Removal

Procedure for removing the rotating hook assembly.

Adjustment of hook timing

Procedure for adjusting the timing of the rotating hook.

Adjustment of hook point to needle distance

Procedure for setting the distance between hook point and needle.

Thread gap adjustment

Procedure for adjusting thread gaps within the rotating hook.

Feed Mechanism - Feed Lift Shaft - Actuating Shaft

Adjustment of feed dog alignment

Procedure for aligning the feed dog.

Adjustment of feed dog height

Cam Stack and Shaft (258)

Pendulum timing adjust

Procedure for adjusting the pendulum timing of the cam stack.