3) Adjustment to the moving knife position .....................................................................................48
1. Standard adjustments..................................................................................................................49
2. Specific adjustment .....................................................................................................................49
4) Correct position of the counter knife............................................................................................50
5) Adjustment of rise of the second thread tension disc................................................................52
1. How to check the amount of rise of the second thread tension disc ...........................................53
2. How to adjust the amount of rise of the second thread tension disc ...........................................53
6) Adjustment of the fixed knife blade tip.........................................................................................54
7) Replacement of the moving knife .................................................................................................56
8) Replacement of the knife thread guide.........................................................................................58
9) Adjustment of the picker................................................................................................................60
1. Method of confirmation ................................................................................................................61
2. Method of standard adjustments (Adjustment of clearance) .......................................................61
3. Method of standard adjustments (Adjustment of tip position)......................................................61
10)Adjustment of the drive arm stopper ............................................................................................62
11) Replacement of the knife unit........................................................................................................64
(12) Adjustment of the wiper (DDL-9000A- -WB/OB).............................................66
(13) Adjustment of feed lever pressure..........................................................................68
(14) Adjustment of external parts ...................................................................................70
1) Adjustment of the pulley cover .....................................................................................................70
2) Clearance of the hand wheel .........................................................................................................70
3) Adjustment of the bobbin winder unit ..........................................................................................72
1. Replacement of the bobbin friction wheel....................................................................................73
2. Adjustment of the bobbin winder driver wheel position ...............................................................73
4. Maintenance ................................................................................................ 74
(1) Oil quantity check .....................................................................................................74
(2) Application of appropriate grease ..........................................................................74
1) Needle bar lower bushing (DDL-9000A-M , A-DS Specification) .............................................74
2) Feed bar mechanisms ....................................................................................................................76
3) Face plate mechanism ...................................................................................................................78
(3) Lubrication mechanism configuration and adjustments
(DDL-9000A-SS, SH, MA, MS) ..................................................................................80
(4) Thread take-up lever mechanism ............................................................................82
(5) Replacement of the motor .......................................................................................84
(6) Replacement of the timing belt ...............................................................................84
5. Screws for attachment and positions of external parts .......................... 86
6. Dry hook....................................................................................................... 87
(1) Cautions when a dry hook is used..........................................................................87
(2) Replacement of the dry hook ..................................................................................87
7. Head section and control circuit connection diagram ............................ 88
8. Air blow type hook cooling unit (available separately) ........................... 89
9. Troubles and corrective measures ........................................................... 90
(1) Mechanical parts.......................................................................................................90
(2) Sewing conditions ....................................................................................................96
10. Drawing of the table................................................................................ 107
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