Juki Platform Serger TU-273U (Top and Bottom Feed) and TNU-243U (Combined Feed) User Manual / Owner's Handbook - English

Summary

This comprehensive manual provides essential safety instructions, operational guidelines, and maintenance procedures for your advanced sewing machine. Designed for both expert operators and specialized repair technicians, this guide ensures safe handling, optimal performance, and proper equipment upkeep. Review these vital precautions carefully before every use or service to maximize the lifespan of your machinery and maintain a secure working environment.

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Juki Platform Serger TU-273U (Top and Bottom Feed) and TNU-243U (Combined Feed) User Manual / Owner's Handbook - English - Page 1

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Page 1 Text Content

TNU-243

INSTRUCTION MANUAL

NOTE : Read safety instructions carefully and understand them before using. Retain this Instruction Manual for future reference.

SEWING MACHINERY BUSINESS UNIT 2-11-1, TSURUMAKI, TAMA-SHI, TOKYO, 206-8551, JAPAN PHONE : (81)42-357-2371 FAX : (81)42-357-2380 http://www.juki.com

Please do not hesitate to contact our distributors or agents in your area for further information when neces- sary. Copyright Ⓒ 2011-2013 JUKI CORPORATION ＊ The description covered in this instruction manual is subject to change for improvement of the commodity without notice. No.02

13 · 09 Printed in Japan

Page Summary Contents For Juki Platform Serger TU-273U (Top and Bottom Feed) and TNU-243U (Combined Feed) User Manual / Owner's Handbook - English

Page 1 TNU-243 INSTRUCTION MANUAL NOTE : Read safety instructions carefully and understand them before using. Retain this Instruction Manual for future reference. SEWING MACHINERY BUSINESS UNIT 2-11-1, TSURU...

Page 3 TO ENSURE SAFE USE OF YOUR SEWING MACHINE For the sewing machine, automatic machine and ancillary devices (hereinafter collectively referred to as ar ni ng la be "machine"), it is inevitable...

Page 4 SAFETY PRECAUTIONS 22. MOTOR PULLEY AND SEWING SPEED Use an M type V-belt. DANGER The relation among the motor pulley, the sewing speed of sewing machine is as shown in the table below: Number of Effe...

Page 5 – 11 – iii

Page 6 20. ADJUSTING THE WALKING FOOT AND PRESSER FOOT WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power of...

Page 7 Precautions to be taken so as to use the TNU-243 more safely 1. Keep your hands away from needle when you turn ON the power switch or while the machine is in operation. 2. Do not put your fi ngers int...

Page 8 DECLARATION OF INCORPORATION OF PARTLY COMPLETED MACHINERY 19. ADJUSTING THE NEEDLE-TO-SHUTTLE RELATIONSHIP WARNING : We hereby declare that the sewing machine (sewing head) described below ; To prote...

Page 9 17. ADJUSTING THE PRESSER FOOT PRESSURE CONTENTS SPECIFICATIONS ................................................................................................................1 1. INSTALLING THE MACH...

Page 10 SPECIFICATIONS 15. THREAD TENSION 1-needle,unison-feed lockstitch machine with Type of sewing semi-rotary large capacity shuttle for extra heavy- Needle SCHMETZ 794 machine head weight materials Usage...

Page 11 12. HOW TO INSTALL THE NEEDLE 2. INSTALLING THE THREAD STAND 3. INSTALLING THE HANDWHEEL WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the ...

Page 12 6. ASSMBLING THE KNEE PRESS PLATE 7. CLEANING 9. HOW TO INSTALL THE NEEDLE WARNING : WARNING : To protect against possible personal injury due To protect against possible personal injury due to abrupt...

Page 13 6. ASSMBLING THE KNEE PRESS PLATE 7. CLEANING 9. HOW TO INSTALL THE NEEDLE WARNING : WARNING : To protect against possible personal injury due To protect against possible personal injury due to abrupt...

Page 14 12. HOW TO INSTALL THE NEEDLE 2. INSTALLING THE THREAD STAND 3. INSTALLING THE HANDWHEEL WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the ...

Page 15 SPECIFICATIONS 15. THREAD TENSION 1-needle,unison-feed lockstitch machine with Type of sewing semi-rotary large capacity shuttle for extra heavy- Needle SCHMETZ 794 machine head weight materials Usage...

Page 16 17. ADJUSTING THE PRESSER FOOT PRESSURE CONTENTS SPECIFICATIONS ................................................................................................................1 1. INSTALLING THE MACH...

Page 17 DECLARATION OF INCORPORATION OF PARTLY COMPLETED MACHINERY 19. ADJUSTING THE NEEDLE-TO-SHUTTLE RELATIONSHIP WARNING : We hereby declare that the sewing machine (sewing head) described below ; To prote...

Page 18 Precautions to be taken so as to use the TNU-243 more safely 1. Keep your hands away from needle when you turn ON the power switch or while the machine is in operation. 2. Do not put your fi ngers int...

Page 19 20. ADJUSTING THE WALKING FOOT AND PRESSER FOOT WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the power of...

Page 20 – 11 – iii

Page 21 SAFETY PRECAUTIONS 22. MOTOR PULLEY AND SEWING SPEED Use an M type V-belt. DANGER The relation among the motor pulley, the sewing speed of sewing machine is as shown in the table below: Number of Effe...

Page 22 TO ENSURE SAFE USE OF YOUR SEWING MACHINE For the sewing machine, automatic machine and ancillary devices (hereinafter collectively referred to as "machine"), it is inevitable to conduct sew...

Page 24 TNU-243 INSTRUCTION MANUAL NOTE : Read safety instructions carefully and understand them before using. Retain this Instruction Manual for future reference. SEWING MACHINERY BUSINESS UNIT 2-11-1, TSURU...

Manual Details

Brand	Juki
Pages	24
File Size	2.55 MB
Published	May 29, 2026

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Frequently Asked Questions

What is the primary safety concern when operating the machine?

Operators and maintenance personnel must carefully read all SAFETY PRECAUTIONS and keep hands away from moving parts.

What type of belt should be used for the machine?

You must use an M type V-belt.

What precautions should I take when adjusting belt tension?

Be aware that there is a danger of entanglement if you do not keep the belts stable while operating or adjusting them.

How does one determine the number of effective revolutions?

The relationship between the motor pulley and sewing speed is calculated using a specific table provided in the manual.