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Lower looper

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6.13 Lower Looper Components No. Part No. 1 20705002 2 207S11016 3 207S11005 4 20704006 5 S05018 6 20702004 7 20628006 8 207S11004 9 20628005 10 20622019 11 XXXXXXXX 12 207S14006 13 207S11028 14 20704007 15 207S20004 16 207S15001 17 20704013 18 S05018 Description Connection assembly Screw Screw Crank assembly Screw Shaft Washer Screw Spring washer Oil seal Lower looper Screw Screw Lower looper holder assembly Screw Screw Crank assembly Screw 3 thread 1 2 2 1 1 1 1 1 1 1 1 0 1 1 1 1 0 0 Qty 4 thread 1 2 2 1 1 1 1 1 1 1 1 0 1 1 1 1 0 0 5 thread 1 2 2 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 Ultra High Speed Overedge and Safety Stitch Machine | Instruction Manual and Parts List 47

Section	Page
Contents	2
1 Safety Instructions	4
1.1 Important Safety Instructions	4
1.2 For Safe Operation	5
2 Product Description and Machine Specification	6
2.1 Product Description	6
2.2 Machine Specification	7
2.3 Motor, Motor Pulley and V-Belt Specifications	8
3 Setup and Adjustment Instructions	9
3.1Table Cut-OutDiagram	9
3.2 Machine Installation	10
3.3 Lubrication and OilDrainage	12
3.4 Fill Silicon Oil to Reservoir	13
3.5 Needle Attachment (or Replacement)	13
3.6 Replacing Upper and Lower Knife	14
3.7 MachineThreading	15
3.7.1 EasyThreadingMethod	15
3.7.2ThreadingDiagram	15
3.8 Thread Tension Adjustment	16
3.9 Presser foot pressure	17
3.10 Adjusting the Differential Feed Rate	17
3.11 Stitch Length Adjustment	18
3.12 Parts Relation and Timing	19
4 Maintenance	20
4.1 Machine HeadCleaning	20
4.2 Oil Changeand FilterCleaning	20
4.3 SafetyInspection	20
5 Troubleshooting	21
6 Parts list	23
6.1 Machine Bed Frame Components	24
6.2 Machine Cover Components (1)	26
6.3 Machine Cover Components (2)	28
6.4 Crank shaft Drive Components	30
6.5 Thread Tension Components	32
6.6 Thread Guide and Thread Take-up Components (1)	34
6.7 Thread Guide and Thread Take-up Components (2)	36
6.8 Thread Guide and Thread Take-up Components (3)	38
6.9 Needle Bar Components (1)	40
6.10 Needle Bar Components (2)	42
6.11 Needle Plate and Needle Guard Components	44
6.12 Upper Looper Components	46
6.13 Lower Looper Components	48
6.14 Chain Stitch Looper Components (1)	50
6.15 Chain Stitch Looper Components (2)	52
6.16 Differencial Feed Components	54
6.17 Feed Dog Components	56
6.18 Knife Drive Components	58
6.19 Presser Foot Components	60
6.20 Lubrication Components (1)	62
6.21 Lubrication Components (2)	64
6.22 Silicon Oil Reservoir Components	66
6.23 Exclusive Parts List for 321K series	68
6.24 Thread Stand Components	70
6.25 Accessories	72
6.26 Machine Support Plate For Semi-Submerged Components	74
6.27 Specific Parts for 321D-251 Hand 321K-251H	75
6.28 Optional Parts	76
6.29 Back Latch Components	78
6.30 Vacuum Suction & AFL Device (Option parts)	80
ChainCutter DeviceComponents	82