PREFACE
This Engineer’s Manual is written for the technical personnel who are responsible for the service and mainte-
nance of the machine.
The Instruction Manual for these machines intended for the maintenance personnel and operators at an
apparel factory contains operating instruction in detail. And this manual describes “Standard Adjustment”,
“Adjustment Procedures”, “Results of Improper Adjustment”, and other important information which are not
covered in the Instruction Manual.
When carrying out the maintenance work on the sewing machine, be sure to refer also to the Instruction
Manual and the Parts List. Further, refer to Engineer’s Manual.
In addition, for the motor for the sewing machine with thread trimmer, refer to the separate Instruction Manual
or This manual gives the “Standard Adjustment” on the former page under which the most basic adjustment
value is described, and on the latter page “Results of Improper Adjustment” under which stitching errors and
troubles arising from mechanical failures and “How to adjust” are described.