Juki MB-1370 Series User's Manual and Instruction Book (English)
Summary
This comprehensive guide is the definitive resource for operating and maintaining the MB-1373 or MB-1377 industrial sewing machine. It provides meticulous, step-by-step instructions covering initial setup, thread guidance, and expert adjustments of all major components, including thread tension systems, button clamps, nippers, and advanced knot-tying mechanisms. Perfect for professional tailors, technical staff, and advanced users, this manual ensures optimal performance, consistent stitching quality, and long-term reliability of your machinery.
Page 1 Text Content
ENGLISH
MB-1373,1377 INSTRUCTION MANUAL
Page Summary Contents For Juki MB-1370 Series User's Manual and Instruction Book (English)
Page 1
ENGLISH MB-1373,1377 INSTRUCTION MANUAL
Page 2
CONTENTS 1. SPECIFICATIONS ........................................................................................................... 2. PREPARATION OF THE SEWING MACHINE ...............................
Page 3
1. SPECIFICATIONS MB-1373 MB-1377 Sewng speed Normal 1,300 st/mn (Max. 1,500 st/mn) Number of sttches 8, 16 and 32 sttches Feed amount Lateral feed 2.5 to 6.5mm Lateral feed 2.5 to 6.5mm Longt...
Page 4
2-2. Lubrication 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 off and ascertaining that the mot...
Page 5
2-4. Attaching the needle bar cover 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 off and ascert...
Page 6
3. ADJUSTMENT OF THE SAWING MACHINE 3-1. Thread tension adjustment Tenson post No. 1 1 s used to adjust the thread tenson to sew on the button and a relatvely low tenson wll be enough. Tenson p...
Page 7
3-4. Adjusting the nipper 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 off and ascertaining tha...
Page 8
3-7. Position of the needle guide 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 off and ascertai...
Page 9
3-11. Timing of thread tension release Turn the needle drvng pulley as you draw the thread n the drec- ton of arrow mark A and you will find a point at which the tension dscs on the tenson post...
Page 10
3-13. Setting a number of stitches 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 off and ascerta...
Page 11
3-15. Adjusting the position of the moving knife 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 o...
Page 12
3-18. Knot-tying mechanisms 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 off and ascertaining t...
Page 13
(4) Changeover of with/without knot-tying To make “wth knot-tyng”, pull knot-tyng changeover knob 1 toward the front and place t to the poston in the figure. To make “wthout knot-tyng”, pull k...
Page 14
3-19. Adjusting the thread tension controller No. 3 WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the powe...
Page 15
2) Adjust the pressure of the thread tenson control- ler. To allow the thread take-up sprng to take effect, 1. to adjust so that the pressure of the thread tenson controller plate s slghtly decre...
Page 16
4-3. Attachments 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 off and ascertaining that the mot...
Page 17
(1) Attachments for shank buttons (Pearl buttons) (Z033) WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work after turning the...
Page 18
(3) Attachment for the second process of wrapped-around buttons (Z035) WARNING : To protect against possible personal injury due to abrupt start of the machine, be sure to start the following work aft...
Page 19
(5) Attachment for metal buttons (Z038) 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 off and as...
Page 20
5. TROUBLES AND CORRECTIVE MEASURES TROUBLES CAUSES CORRECTIVE MEASURES 1. Thread breakage The yoke slde does not move n the correct Adjust the tmng of forward, backward and way. sdeways of the y...
Manual Details
| Brand | Juki |
|---|---|
| Pages | 20 |
| File Size | 977.53 KB |
| Published | May 29, 2026 |
79 views
Enter the captcha to get the download link:
Frequently Asked Questions
Why are my threads not separating properly during trimming?
You should adjust the position of the moving knife or examine if there is inadequate separation angle related to your fabric width.
What should I do if the needle hits the edge inside the button holes?
Adjust the button clamp jaw lever holder, as this suggests misalignment when stitching into the holes.
If Thread Tension Post No. 2 fails to release properly, what is the fix?
Try making the thread release timing slightly later, or alternatively, provide more tension to the stitches motion for proper timing.