Table Of Contents - JUKI MB-1373 Engineer's Manual

1. Specifications ........................................................................................................ 1
2. Standard Adjustment ............................................................................................ 2
(1) Height of the needle bar ........................................................................................................ 2
(2) Positioning the looper............................................................................................................ 2
(3) Yoke-slide timing .................................................................................................................... 4
(4) The floating timing of thread tension disc No.2 .................................................................. 4
(5) Height and pressure of the button clamp ............................................................................ 6
(6) Thread tension disc No. 1 ...................................................................................................... 6
(7) Positioning the thread nipper ............................................................................................... 8
(8) Adjusting the stitch selecting mechanism .......................................................................... 8
(9) Positioning the stitch adjusting cam .................................................................................. 10
(10) Adjusting the stop-motion position .................................................................................... 10
(11) Positioning the stop-motion disc and the stop-motion plunger ..................................... 12
(12) Changing over the quick stitch-shape changing mechanism (MB-1377) ....................... 14
(13) Positioning the feed cam ..................................................................................................... 16
(14) Positioning the button lifting link ....................................................................................... 16
(15) Positioning the needle driving pulley pressure applying lever ....................................... 18
(16) Positioning the thread pull-off lever ................................................................................... 18
Adjustments of the Automatic thread trimmer ........................................ 20
3.
(1) The mechanism and the name of each component of the thread trimmer .................... 20
(2) Adjusting the position of the moving knife ....................................................................... 22
(3) Adjusting the height of the thread separating claw of the moving knife....................... 22
(4) Clearance between the lifting lever and the adjusting screw .......................................... 24
(5) Installing the button clamp lifting rod ................................................................................ 24
4. Adjustments of the knot-tying mechanism ............................................. 26
(1) The mechanism and the name of each component of the knot-tying feature ............... 26
(2) Adjusting the connecting plate ........................................................................................... 26
(3) Adjusting the thread bind arm stopper .............................................................................. 28
(4) Adjusting the thread bind notch ......................................................................................... 28
(5) Adjusting the lever ............................................................................................................... 30
(6) Adjusting the speed slowing friction plate ........................................................................ 30
5. Maintenance ............................................................................................... 32
(1) Applying the exclusive grease ............................................................................................ 32
6. Troubleshooting .......................................................................................... 40
(1) Stitching troubles ................................................................................................................. 40
(2) Mechanical troubles ............................................................................................................. 42
(3) Thread trimming troubles .................................................................................................... 43
7. Table diagram ............................................................................................. 45
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