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CONTENTS
BEFORE OPERATION ........................................................................................................1
1. SPECIFICATIONS ......................................................................................................... 3
2. INSTALLATION ............................................................................................................. 5
3. ADJUSTING THE BELT TENSION ...............................................................................8
4. INSTALLING THE SYNCHRONIZER SUPPORT ROD ................................................9
5. ATTACHING THE BELT COVER ................................................................................10
6. INSTALLING THE KNEE SWITCH
(Applicable only to the machine equipped with DL knee switch control device.)
...... 12
7. INSTALLING THE AIR DRIVE UNIT ........................................................................... 13
8. INSTALLING THE THREAD STAND........................................................................... 17
9. LUBRICATION ............................................................................................................. 18
10. ATTACHING THE NEEDLE ......................................................................................... 21
11. ATTACHING/REMOVING THE BOBBIN..................................................................... 23
12. THREADING THE HOOK ............................................................................................ 24
13. INSTALLING THE THREAD GUIDE ........................................................................... 25
14. WINDING A BOBBIN ................................................................................................... 26
15. ADJUSTING THE AMOUNT OF OIL IN THE HOOK .................................................. 28
16. THREADING THE MACHINE HEAD ........................................................................... 29
17. ADJUSTING THE STITCH LENGTH ..........................................................................31
18. THREAD TENSION ..................................................................................................... 32
19. THREAD TAKE-UP SPRING .......................................................................................35
20. HAND LIFTER ............................................................................................................. 36
21. ADJUSTING THE PRESSURE OF THE PRESSER FOOT ........................................ 37
22. NEEDLE-TO-HOOK RELATION ................................................................................. 38
23. ADJUSTING THE HOOK NEEDLE GUARD ............................................................... 40
24. ADJUSTING THE BOBBIN CASE OPENING LEVER ...............................................41
25. POSITION OF THE COUNTER KNIFE AND ADJUSTMENT
OF THE KNIFE PRESSURE ....................................................................................... 42
26. ADJUSTING THE LIFTING AMOUNT OF THE PRESSER FOOT
AND THE WALKING FOOT ........................................................................................ 44
27. SEWING SPEED TABLE .............................................................................................44
28. RESETTING THE SAFETY CLUTCH .........................................................................46
29. OPERATION SWITCHES ............................................................................................ 48
30. KNEE SWITCH
(Applicable only to the machine equipped with DL knee switch control device.)
...... 54
31. TROUBLES IN SEWING AND CORRECTIVE MEASURES.......................................56
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