Pfaff 4874 User Manual

4874
SERVICE MANUAL

Pfaff 4874 Specifications

General

Brand	Pfaff
Model	4874
Category	Sewing Machine
Language	English

Summary

General Directions and Recommendations

Safety

General safety precautions for operating and servicing the sewing machine.

Mechanical Sewing Disorders

Skipped overlock stitches

Troubleshooting steps for skipped stitches in overlock sewing.

Thread breakage

Skipped chainstitches - Cover hems

Troubleshooting for skipped stitches in chainstitch and cover hem modes.

Irregular stitches

Breakage of needle

Test Program - Test of LCD Display

Test Program-Thread Tension Setting-Dial Tension Fine Tuning

Error Code

Timing of Lower Looper

Clearance and Timing of Upper Looper to Lower Looper

Chain Looper : Angular Position - Clearance - Orbital Timing - Clearance of Chain Needles Guard

Moving Cutter and Vertical Feed Timing

Horizontal Feed Timing Against Chainstitch Needle

Adjustment for Differential Feed Unit Operated with Stepping Motor

Adjustment of Setting Position for EN-Sensor & Slit-Plate

Adjustment of setting position for EN-Sensor

Adjustment of setting position of Slit-plate

Adjustment for Stitch Length Unit Operated with Step Motor

Irregular Loop Formation on the Chain Needles (Cover Hems)