| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 134 SES SERV 7 | Needle (standard) |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| C | 226 25206 | 226 30206 | |
| D | 226 25305 | 226 30305 | |
| E | 226 25404 | 226 30503 | |
| E | 226 01058 | 226 00555 | |
| F | 226 25503 | 226 30602 | |
| G | 226 25602 | 226 30800 | |
| H | 226 25701 | 226 30909 | |
| K | 226 25800 | 226 31006 | |
| W | 226 25909 | 226 31105 | |
| L | 226 26006 | 226 31303 | |
| M | 226 26105 | 226 31402 | |
| M | 226 01157 | 226 00654 | |
| N | 226 26204 | 226 31501 | |
| P | 226 26303 | 226 31709 | |
| Q | 226 26402 | 226 31808 | |
| Q | 226 01256 | 226 00753 | |
| R | 226 26501 | 226 31907 | |
| S | 226 26600 | 226 32004 | |
| T | 226 26709 | 226 32103 | |
| T | 226 01355 | 226 00852 | |
| U | 226 26808 | 226 32202 | |
| A | 226 25008 | 226 35007 | |
| B | 226 25107 | 226 30107 | |
| C | 226 25206 | 226 35104 | |
| D | 226 25305 | 226 35205 | |
| E | 226 25404 | 226 35403 | |
| E | 226 01058 | 226 00555 | |
| F | 226 25503 | 226 35502 | |
| G | 226 25602 | 226 35700 | |
| H | 226 25701 | 226 35809 | |
| K | 226 25800 | 226 35908 | |
| W | 226 25909 | 226 36005 | |
| L | 226 26006 | 226 36203 | |
| M | 226 01157 | 226 00654 | |
| M | 226 26105 | 226 36302 | |
| N | 226 26204 | 226 36401 | |
| P | 226 26303 | 226 36609 | |
| Q | 226 26402 | 226 36708 | |
| Q | 226 01256 | 226 00753 | |
| R | 226 26501 | 226 36807 | |
| S | 226 26600 | 226 36906 | |
| T | 226 26709 | 226 37003 | |
| T | 226 01355 | 226 00852 | |
| U | 226 26808 | 226 37102 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 226 25305 | B1613 512 DOH | ||
| 226 40353 | 226 01058 | ||
| 226 25404 | B1613 512 EOH | ||
| 226 40452 | 226 00555 | ||
| 226 25503 | B1613 512 FOH | ||
| 226 40551 | 226 01157 | ||
| 226 25602 | B1613 512 GOH | ||
| 226 40759 | 226 00654 | ||
| 226 25701 | B1613 512 HOH | ||
| 226 40858 | 226 01256 | ||
| 226 25800 | B1613 512 KOH | ||
| 226 40957 | 226 00753 | ||
| 226 26006 | B1613 512 LOH | ||
| 226 41252 | 226 01355 | ||
| 226 26105 | B1613 512 MOH | ||
| 226 41351 | 226 00852 | ||
| 226 26204 | B1613 512 NOH | ||
| 226 41450 | 226 01058 | ||
| 226 26303 | B1613 512 POH | ||
| 226 41658 | 226 00555 | ||
| 226 26402 | B1613 512 QOH | ||
| 226 41757 | 226 01157 | ||
| 226 26501 | B1613 512 ROH | ||
| 226 41856 | 226 00654 | ||
| 226 26600 | B1613 512 SOH | ||
| 226 41955 | 226 01256 | ||
| 226 26709 | B1613 512 TOH | ||
| 226 42052 | 226 00753 | ||
| 226 26808 | B1613 512 UOH | ||
| 226 42151 | 226 01355 | ||
| 226 00852 | 226 01058 | ||
| 226 25107 | 226 30107 | ||
| 226 28002 | 101 85957 | ||
| 226 25305 | 226 35304 | ||
| 226 28200 | 101 86054 | ||
| 226 25503 | 226 35502 | ||
| 226 28408 | 101 86757 | ||
| 226 25602 | 226 35700 | ||
| 226 28507 | 101 86153 | ||
| 226 25701 | 226 35809 | ||
| 226 28701 | 101 86856 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 226 60302 | 226 60302 | ||
| 226 60401 | 226 60401 | ||
| 226 50857 | 226 50857 | ||
| 226 60500 | 226 60500 | ||
| 226 60609 | 226 60609 | ||
| 226 60708 | 226 60708 | ||
| 226 60807 | 226 60807 | ||
| 226 60906 | 226 60906 | ||
| 226 61003 | 226 61003 | ||
| 226 50956 | 226 50956 | ||
| 226 61102 | 226 61102 | ||
| 226 61201 | 226 61201 | ||
| 226 61300 | 226 61300 | ||
| 226 61409 | 226 61409 | ||
| 226 51053 | 226 51053 | ||
| 226 61508 | 226 61508 | ||
| 226 61607 | 226 61607 | ||
| 226 51152 | 226 51152 | ||
| 226 61706 | 226 61706 | ||
| 226 60104 | 226 60104 | ||
| 226 60203 | 226 60203 | ||
| 226 60302 | 226 60302 | ||
| 226 60401 | 226 60401 | ||
| 226 50857 | 226 50857 | ||
| 226 60500 | 226 60500 | ||
| 226 60609 | 226 60609 | ||
| 226 60708 | 226 60708 | ||
| 226 60807 | 226 60807 | ||
| 226 60906 | 226 60906 | ||
| 226 61003 | 226 61003 | ||
| 226 50956 | 226 50956 | ||
| 226 61102 | 226 61102 | ||
| 226 61201 | 226 61201 | ||
| 226 61300 | 226 61300 | ||
| 226 51053 | 226 51053 | ||
| 226 61409 | 226 61409 | ||
| 226 61508 | 226 61508 | ||
| 226 61607 | 226 61607 | ||
| 226 51152 | 226 51152 | ||
| 226 61706 | 226 61706 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 101 47858 | 226 60401 | 226 60401 | 102 39101 |
| 226 50857 | 226 50352 | 102 09230 | |
| 101 47957 | 226 60500 | 226 60500 | 102 39200 |
| 101 48054 | 226 60609 | 226 60609 | 102 39309 |
| 101 48153 | 226 60708 | 226 60708 | 102 39408 |
| 101 48252 | 226 60807 | 226 60807 | 102 39507 |
| 101 48351 | 226 60906 | 226 60906 | 102 39606 |
| 101 48450 | 226 61003 | 226 61003 | 101 70801 |
| 101 48559 | 226 61102 | 226 61102 | 102 39804 |
| 226 50956 | 226 50451 | 102 09500 | |
| 101 48658 | 226 61201 | 226 61201 | 102 39903 |
| 101 48757 | 226 61300 | 226 61300 | 101 71106 |
| 101 43856 | 226 61409 | 226 61409 | 101 71205 |
| 226 51053 | 226 50550 | 102 09807 | |
| 101 48955 | 226 61508 | 226 61508 | 101 71304 |
| 101 49052 | 226 61607 | 226 61607 | 101 71403 |
| 226 51152 | 226 50659 | 102 09906 | |
| 101 49151 | 226 61706 | 226 61706 | 101 71502 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 226 25206 | 226 30206 | ||
| 226 25305 | 226 30404 | ||
| 226 25404 | 226 30503 | ||
| 226 25503 | 226 30602 | ||
| 226 25602 | 226 30800 | ||
| 226 25701 | 226 30909 | ||
| 226 25800 | 226 31006 | ||
| 226 26006 | 226 31303 | ||
| 226 26105 | 226 31402 | ||
| 226 26204 | 226 31501 | ||
| 226 26402 | 226 31808 | ||
| 226 01058 | 226 00555 | ||
| 226 01058 | 226 00555 | ||
| 226 01058 | 226 00555 | ||
| 226 01058 | 226 00555 | ||
| 226 01058 | 226 00555 | ||
| 226 01058 | 226 00555 | ||
| 226 01058 | 226 00555 | ||
| 226 01157 | 226 00654 | ||
| 226 01157 | 226 00654 | ||
| 226 01157 | 226 00654 | ||
| 226 01256 | 226 00753 | ||
| 226 25107 | 226 30107 | ||
| 226 25206 | 226 35205 | ||
| 226 25305 | 226 35304 | ||
| 226 25404 | 226 35403 | ||
| 226 25503 | 226 35502 | ||
| 226 25602 | 226 35700 | ||
| 226 25701 | 226 35809 | ||
| 226 25800 | 226 35908 | ||
| 226 26006 | 226 36203 | ||
| 226 26105 | 226 36302 | ||
| 226 26204 | 226 36401 | ||
| 226 26402 | 226 36708 | ||
| 226 37656 | 226 01058 | ||
| 226 37755 | 226 01058 | ||
| 226 37854 | 226 01058 | ||
| 226 37953 | 226 01058 | ||
| 226 38050 | 226 01058 | ||
| 226 38258 | 226 01058 | ||
| 226 38357 | 226 01058 | ||
| 226 38456 | 226 01058 | ||
| 226 38753 | 226 01157 | ||
| 226 38852 | 226 01157 | ||
| 226 38951 | 226 01157 | ||
| 226 39256 | 226 01256 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 226 25305 | B1613 512 DOH | ||
| 226 40353 | 226 01058 | ||
| 226 25404 | B1613 512 EOH | ||
| 226 40452 | 226 01058 | ||
| 226 25503 | B1613 512 FOH | ||
| 226 40551 | 226 01058 | ||
| 226 25602 | B1613 512 GOH | ||
| 226 40759 | 226 01058 | ||
| 226 25701 | B1613 512 HOH | ||
| 226 40858 | 226 01058 | ||
| 226 25800 | B1613 512 KOH | ||
| 226 40957 | 226 01058 | ||
| 226 26006 | B1613 512 LOH | ||
| 226 41252 | 226 01157 | ||
| 226 26105 | B1613 512 MOH | ||
| 226 41351 | 226 01157 | ||
| 226 26204 | B1613 512 NOH | ||
| 226 41450 | 226 01157 | ||
| 226 26402 | B1613 512 QOH | ||
| 226 41757 | 226 01256 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 226 60302 | 102 37907 | ||
| 226 60401 | 102 38004 | ||
| 226 60500 | 102 38103 | ||
| 226 60609 | 102 38202 | ||
| 226 60708 | 102 38301 | ||
| 226 60807 | 102 38400 | ||
| 226 60906 | 102 38509 | ||
| 226 61102 | 102 38707 | ||
| 226 61201 | 102 38806 | ||
| 226 61300 | 102 38905 | ||
| 226 61508 | 102 39002 | ||
| 226 60203 | 226 65103 | ||
| 226 60302 | 226 65202 | ||
| 226 60401 | 226 65301 | ||
| 226 60500 | 226 65400 | ||
| 226 60609 | 226 65509 | ||
| 226 60708 | 226 65707 | ||
| 226 60807 | 226 65806 | ||
| 226 60906 | 226 65905 | ||
| 226 61102 | 226 66200 | ||
| 226 61201 | 226 66309 | ||
| 226 61300 | 226 66408 | ||
| 226 61508 | 226 66705 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 226 60401 | B1402-528-DALA | ||
| 102 39101 | B1402-528-DARA | ||
| 226 60500 | B1402-528-EAL | ||
| 102 39200 | B1402-528-EAR | ||
| 226 60609 | B1402-528-FALA | ||
| 102 39309 | B1402-528-FARA | ||
| 226 60708 | B1402-528-GAL | ||
| 102 39408 | B1402-528-GAR | ||
| 226 60807 | B1402-528-HALA | ||
| 102 39507 | B1402-528-HARA | ||
| 226 60906 | B1402-528-KALA | ||
| 102 39606 | B1402-528-KARA | ||
| 226 61102 | B1402-528-LAL | ||
| 102 39804 | B1402-528-LAR | ||
| 226 61201 | B1402-528-MAL | ||
| 102 39903 | B1402-528-MAR | ||
| 226 61300 | B1402-528-NAL | ||
| 101 71106 | B1402-528-NAR | ||
| 226 61508 | B1402-528-QAL | ||
| 101 71304 | B1402-528-QAR | ||
| 102 09230 | Wiper | ||
| 102 09500 | Wiper | ||
| 102 09807 | Wiper | ||
| 102 09906 | Wiper |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| LH-3128, LH-3168 | Without thread trimmer | ||
| LH-3128-7, LH-3168-7 | With thread trimmer | ||
| MTL2200040S | Clutch motor | ||
| SC-1 | SC-1 | ||
| M0001351AA0 | M0001351AA0 | ||
| M6101351AA0 | M6101351AA0 | ||
| MTKP0070000 | 070 | ||
| MTKP0060000 | 060 | ||
| MTSP00800B0 | 080 | ||
| MTJVH004200A | 42" | ||
| MTJVH004100A | 41" | ||
| MTJVH004000A | 40" | ||
| B9117051000 | Bobbin | ||
| 10210805 | Bobbin | ||
| 22612055 | Latch hook (asm.) | ||
| 22653158 | Latch hook (asm.) with thread trimmer | ||
| 22612758 | Cap hook (asm.) | ||
| 22653059 | Cap hook asm. with thread trimmer | ||
| 22688253 | Hook (asm.) for an organized split needle bar | ||
| 22693857 | Hook (asm.) for an organized split needle bar and a thread trimmer. | ||
| 22603708 | Felt | ||
| 10211605 | Moving knife | ||
| 10210805 | Bobbin (F type) | ||
| 22655302 | Counter knife | ||
| 22655401 | Thread presser | ||
| 22603708 | Felt |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 22601504 | Slide plate window | ||
| 22604300 | Timing belt | ||
| B3128051000 | Thread take-up spring (A) | ||
| B3128527000 | Thread take-up spring (B) | ||
| 22628903 | Idling prevention sheet (0.3) | ||
| 22601504 | Slide plate window | ||
| 22604300 | Timing belt | ||
| B3128051000 | Thread take-up spring (A) | ||
| B3128527000 | Thread take-up spring (B) | ||
| 10111508 | Idling prevention spring | ||
| 22653802 | Idling prevention sheet |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| LH-3128 | Latch hook | ||
| LH-3128-7 | Latch hook with a thread trimmer | ||
| LH-3128 | Cap hook | ||
| LH-3128-7 | Cap hook with a thread trimmer | ||
| LH-3168 | Hook for an organized split needle bar | ||
| LH-3168-7 | Hook with a thread trimmer and an organized split needle bar |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | needle bar | |
| 2 | 2 | presser bar | |
| 4 | 4 | screw | |
| 3 | 3 | presser bar lower bushing | |
| 1 | 1 | feed dog | |
| 4 | 4 | screws | |
| 2 | 2 | throat plate | |
| 3 | 3 | screws | |
| 5 | 5 | clamping screw | |
| 11 | 11 | Fig. | |
| 6 | 6 | feed rocker | |
| 1 | 1 | feed dogs | |
| 2 | 2 | feed dog slots | |
| 9 | 9 | Fig. | |
| 5 | 5 | screw | |
| 1 | 1 | feed dog | |
| 4 | 4 | screws | |
| 1 | 1 | feed dog | |
| "." | |||
| 4 | 4 | screws | |
| 1 | 1 | feed dog | |
| "." | |||
| 2 | 2 | throat plate | |
| 7 | 7 | screw | |
| 12 | 12 | Fig. | |
| 1 | 1 | feed dog | |
| 2 | 2 | throat plate | |
| 7 | 7 | screw |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| LH-3128 | S, A and G type | ||
| LH-3128-7 | S, A and G type | ||
| LH-3128 | F type | ||
| LH-3168 | S, A and G type | ||
| LH-3168-7 | S, A and G type | ||
| a | 12.6±0.15 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | needle bar | ||
| 2 | needle bar frame | ||
| 3 | needle clamp | ||
| 4 | screw | ||
| 5 | screw | ||
| 6 | needle clamp | ||
| 7 | clamping screw | ||
| 8 | spring shoe |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| LH-3168 | LH-3168-7 | ||
| LH-3128 | LH-3128-7 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| LH-3128 | Lift of the needle bar | ||
| LH-3128-7 | Lift of the needle bar |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 16 | 16 | hinge screw | |
| 1 | 1 | screw | |
| 2 | 2 | screw | |
| 6 | 6 | screws | |
| 7 | 7 | hook driving shaft | |
| 9 | 9 | needle bar | |
| 10 | 10 | needle bar frame | |
| 3 | 3 | hook driving shaft saddle | |
| 5 | 5 | hook driving shaft screw gear | |
| 11 | 11 | hook driving shaft gear | |
| 12 | 12 | screws | |
| 5 | 5 | hook driving shaft gear | |
| 3 | 3 | hook driving shaft saddle | |
| 4 | 4 | hook driving shaft gear guide |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | Connecting link (asm.) | |
| 2 | 2 | Bobbin case stopper | |
| 3 | 3 | Bobbin case opening lever | |
| 4 | 4 | Throat plate ribs | |
| 5 | 5 | Rocking arm stopper screw | |
| 6 | 6 | Rocking arm plate | |
| 7 | 7 | Rocking arm (left) | |
| 8 | 8 | Rocking arm (right) | |
| 9 | 9 | Follower stopper | |
| 10 | 10 | Cam roller shaft | |
| 11 | 11 | Screw | |
| 12 | 12 | Screw | |
| 13 | 13 | Screw | |
| 14 | 14 | Screw | |
| 15 | 15 | Screw | |
| 16 | 16 | Screw |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| A | 10109700 | Hook driving shaft upper bushing thrust plate | |
| C | 10110906 | Hook driving shaft upper bushing thrust plate | |
| D | 10111003 | Hook driving shaft upper bushing thrust plate | |
| E | 10111102 | Hook driving shaft upper bushing thrust plate | |
| F | 10111201 | Hook driving shaft upper bushing thrust plate | |
| B | 10109809 | Hook driving shaft upper bushing thrust plate | |
| G | 10112506 | Hook driving shaft upper bushing thrust plate | |
| H | 10112605 | Hook driving shaft upper bushing thrust plate | |
| K | 10112704 | Hook driving shaft upper bushing thrust plate | |
| G | 10112506 | Hook driving shaft upper bushing thrust plate | |
| H | 10112605 | Hook driving shaft upper bushing thrust plate | |
| K | 10112704 | Hook driving shaft upper bushing thrust plate | |
| A | 22614002 | Hook driving shaft upper bushing spacer | |
| B | 22614101 | Hook driving shaft upper bushing spacer | |
| C | 22614200 | Hook driving shaft upper bushing spacer | |
| D | 22614309 | Hook driving shaft upper bushing spacer | |
| E | 22614408 | Hook driving shaft upper bushing spacer | |
| F | 22614507 | Hook driving shaft upper bushing spacer |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | Feed rock cam | |
| 2 | 2 | Feed rock rod | |
| 3 | 3 | Screw No. 1 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | Face plate oil amount adjusting felt | |
| 2 | 2 | Face plate oil pipe (asm.) |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | screws | |
| 2 | 2 | feed regulator base pin |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | Synchronizer | |
| 2 | 2 | Synchronizer | |
| 3 | 3 | Synchronizer | |
| 4 | 4 | Synchronizer | |
| 5 | 5 | Synchronizer | |
| A | A | Needle-up stop position | |
| B | B | Needle-up stop position | |
| 1 | 1 | Needle-down stop position | |
| 2 | 2 | Needle-down stop position |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 3 | 3 | Fig. 49 | |
| 2 | 2 | Fig. 49 | |
| 1 | 1 | Fig. 49 | |
| 9 | 9 | Slider escape spring | |
| 8 | 8 | Fig. 50 | |
| 6 | 6 | Fig. 51 | |
| 4 | 4 | Fig. 51 | |
| 7 | 7 | Fig. 51 | |
| 5 | 5 | Fig. 51 |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | Hook driving shaft saddle (left) | |
| 2 | 2 | Moving knife rest | |
| 3 | 3 | Rocker arms (left and right) | |
| 4 | 4 | Stopper screw | |
| 5 | 5 | Hook driving shaft saddle | |
| 6 | 6 | No clearance | |
| 7 | 7 | Moving knife shaft thrust collar | |
| 8 | 8 | Align | |
| 9 | 9 | Align | |
| 10 | 10 | Align |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 11 | 1 | Cam roller | |
| 2 | 2 | Cam roller | |
| 3 | 3 | Cam roller | |
| 4 | 4 | Cam roller | |
| 5 | 5 | Cam roller | |
| 6 | 6 | Cam roller | |
| 7 | 7 | Cam roller | |
| 8 | 8 | Cam roller | |
| 9 | 9 | Cam roller | |
| 10 | 10 | Cam roller |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | Cam follower (asm.) | |
| 2 | 2 | Thread trimming magnet | |
| 3 | 3 | Hook driving shaft | |
| 4 | 4 | Cam roller shaft | |
| 5 | 5 | Tension disks | |
| 6 | 6 | Thread trimming cam | |
| 7 | 7 | (Note 2) |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | screws | |
| 2 | 2 | follower presser plate (asm.) | |
| 3 | 3 | thread trimming cam | |
| 4 | 4 | presser driving screw | |
| 5 | 5 | follower presser plate | |
| 6 | 6 | presser plat shaft | |
| 1 | 1 | thread tension release arm | |
| 2 | 2 | thread tension release wire | |
| 3 | 3 | thread tension release plate | |
| 4 | 4 | thread tension release cam | |
| 4 | 4 | nut |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | Press | |
| 2 | 2 | Follower mounting base | |
| 3 | 3 | Contact |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 2 | 2 | follower guide plate | |
| 1 | 1 | cam follower (asm.) | |
| 3 | 3 | screw | |
| 1 | 1 | cam follower (asm.) |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | joint rod (asm.) | |
| 2 | 2 | joint rod (asm.) | |
| 3 | 3 | joint rod (asm.) | |
| 4 | 4 | joint rod (asm.) | |
| 5 | 5 | joint rod (asm.) | |
| 6 | 6 | joint rod (asm.) | |
| 7 | 7 | joint rod (asm.) | |
| 8 | 8 | joint rod (asm.) | |
| 9 | 9 | joint rod (asm.) |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | Wiper components | |
| 2 | 2 | Wiper components | |
| 3 | 3 | Wiper components | |
| 4 | 4 | Wiper components | |
| 1 | 1 | Position of the reverse stitching magnet | |
| 2 | 2 | Position of the reverse stitching magnet | |
| 3 | 3 | Position of the reverse stitching magnet | |
| 4 | 4 | Position of the reverse stitching magnet | |
| 5 | 5 | Position of the reverse stitching magnet |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 10209230 | ~3/8" | ||
| 10209500 | 7/16"~5/8" | ||
| 10209807 | 3/4"~7/8" | ||
| 10209906 | 1"~1 1/4" |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| B3129012A00 | Tension spring | ||
| D3129555D00 | Tension spring | ||
| B3114232000 | Tension spring | ||
| D3129555D00 | Tension spring | ||
| 11045101 | Tension spring No. 1 | ||
| 11045101 | Tension spring No. 1 | ||
| 11093606 | Tension spring No. 1 | ||
| 11045101 | Tension spring No. 1 | ||
| 11071909 | Stitch dial | ||
| 11071909 | Stitch dial | ||
| 11071909 | Stitch dial | ||
| 11072006 | Stitch dial | ||
| MDP500B1400 | Needle (standard) | ||
| MDP500B0900 | Needle (standard) | ||
| MDP500B2100 | Needle (standard) | ||
| MC200520650 | Needle (standard) | ||
| MDP500B1100 | Needle (standard) |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | 1 | screw | |
| 2 | 2 | screw | |
| 3 | 3 | screws | |
| 4 | 4 | connecting link (asm.) | |
| 6 | 6 | screw | |
| 5 | 5 | rocker arm plate | |
| 10 | 10 | screws | |
| 9 | 9 | hook driving shaft gear | |
| 7 | 7 | hook driving shaft |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 1 | screw | ||
| 2 | screw | ||
| 3 | screw | ||
| 4 | screw | ||
| 5 | screw | ||
| 6 | screw | ||
| 7 | screw | ||
| 8 | screw | ||
| 9 | screw | ||
| 10 | screws | ||
| 11 | filler plate | ||
| 12 | presser bar component | ||
| 13 | presser bar component | ||
| 14 | presser bar component | ||
| 15 | presser bar component | ||
| 16 | needle bar frame (asm.) | ||
| 17 | screw | ||
| 18 | needle bar rocking rear arm | ||
| 19 | screws | ||
| 20 | main shaft thrust collar (asm.) | ||
| 21 | counterweight (joint) | ||
| 22 | screw | ||
| 23 | feed adjusting base | ||
| 24 | feed regulating spring | ||
| 25 | feed adjusting base pin | ||
| 26 | screws | ||
| 27 | thrust collar | ||
| 28 | reverse feed control lever | ||
| 29 | reverse feed control lever shaft | ||
| 30 | stitch dial | ||
| 31 | stitch dial | ||
| 32 | timing belt |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 32 | timing belt | ||
| 21 | counterweight (joint) | ||
| 19 | screws | ||
| 20 | main shaft thrust collar | ||
| 1 | screw No. 1 | ||
| 32 | timing belt | ||
| 29 | reverse feed control lever | ||
| 29 | reverse feed control lever shaft | ||
| 27 | thrust collar | ||
| 28 | feed adjusting base | ||
| 30 | screws | ||
| 27 | thrust collar | ||
| 28 | feed adjusting base | ||
| 30 | reverse feed adjusting screw | ||
| 22 | screw | ||
| 16 | needle bar frame (asm.) | ||
| 18 | needle bar rocker rear arm | ||
| 9 | thread take-up components | ||
| 15 | thread take-up components | ||
| 11 | filler plate | ||
| 10 | screws | ||
| 1 | presser bar components | ||
| 9 | presser bar components | ||
| 16 | needle bar frame (asm.) | ||
| 18 | needle bar rocker rear arm | ||
| 17 | screw |
| Ref | Part number | Part name | Qty |
|---|---|---|---|
| 22603708 | felt |
2-Needle, Needle-feed, Lockstitch Machine LH-3128 2-Needle, Needle-feed, Lockstitch Machine with an Automatic Thread Trimmer LH-3128-7-WB 2-Needle, Needle-feed, Lockstitch Machine with an Organized Split Needle Bar LH-3168 2-Needle, Needle-feed, Lockstitch Machine with an Organized Split Needle Bar and an Automatic Thread Trimmer LH-3168-7-WB ENGINEER'S MANUAL JUKI NO. VI-15 1993. 12 jintex.in
PREFACE This Engineer's Manual is written for the technical personnel who are responsible for the service and maintenance of the machines. The Instruction Manual for these machines intended for the maintenance personnel and operators at an apparel factory contains information which are not covered by the Instruction Manual. Separately refer to the Instruction Manual and Engineer's Manual for the SC-1 for the explanation of the motor components of the sewing machine with a thread trimmer. Refer to the "Instruction Manual for the CP-30 series" and the "Installation Manual for the Control Panel" for the explanation of the control panel. It is advisable to use the pertinent Instruction Manual and Parts List together with this Engineer's Manual when carrying out the maintenance of these machines. CAUTION 1. Keep your hands away from the needle when you turn the power switch ON or while the machine is operating. 2. Do not put your fingers into the thread take-up cover while the machine is operating. Do not operate your machine with thread take up cover removed. 3. Be sure to turn the power switch OFF before tilting the machine head or removing the V belt. 4. During operation, be careful not to allow your or any other person's head or hands to come close to the handwheel, V belt, bobbin winder or motor. Also, do not place anything close to them. Doing so may be dangerous. 5. If your machine is provided with a belt cover, finger guard or any other protectors, do not operate you machine with any of them removed. 6. For the machine that is not equipped with a thread trimmer and uses a clutch motor, never depress the foot pedal unless the main switch has turned ON. BEFORE OPERATION 1. Don't run the machine before filling the oil reservoir with the prescribed lubricating oil. 2. After setting up your machine, make sure that it runs in the correct direction; lower the needle by turning the handwheel and watch the handwheel's revolution by momentarily switching the power "on" (correct rotational direction of the handwheel: counterclockwise when viewed from the handwheel's end.) 3. Run the newly installed machine at a speed of 2,500 s.p.m. or lower for the first 4 weeks. 4. Confirm the ratings of your power source by the machine plate stuck on the motor (power voltage, phase etc.) jintex.in
1. SPECIFICATIONS (1) Model designation (LH model without thread trimmer) LH-31 O: Without automatic reverse feed B: With automatic reverse feed Needle gauge A: Light-weight materials F: Foundations (LH-3128) G: Jeans S: Medium-weight materials 28: Small hook 68: Small hook for corner stitching Table 1 Model LH-3128 LH-3168 Stitch type A G S F A S G Max. sewing speed 3000 s.p.m Max. stitch length (forward and reverse stitching) 5 x 5 mm Needle (standard) DP x 5 (#9~#14) DP x 5 (#18~#22) DP x 5 (#11~#18) 134 SES SERV 7 (Nm 65~80) DP x 5 (#9~#14) DP x 5 (#11~#18) DP x 5 (#18~#22) Presser foot lift Hand lifter 5.5 mm Knee lifter 12 mm Organized split needle bar mechanism Not provided with Provided with *1: 134SES SERV7 Nm65 (2) Model designation (LH model with thread trimmer) LH-31 -7 00: Without wiper, without automatic reverse feed OB: Without wiper, with automatic reverse feed WO: With wiper, without automatic reverse feed WB: With wiper, with automatic reverse feed Needle gauge A: Light-weight materials S: Medium-weight materials G: Jeans 28: Small hook 68: Small hook for corner stitching Table 2 Model LH-3128-7 LH-3168-7 Stitch type A S G A S G Max. sewing speed 3000 s.p.m Max. stitch length (forward and reverse stitching) 5 x 5 mm Needle (standard) DP x 5 (#9~#14) DP x 5 (#11~#18) DP x 5 (#18~#22) DP x 5 (#9~#14) DP x 5 (#11~#18) DP x 5 (#18~#22) Presser foot lift Hand lifter 5.5 mm Knee lifter 12 mm (with wiper: 9 mm) Organized split needle bar mechanism Not provided with Provided with -1- Jinte.x.in
2. LIST OF GAUGE COMPONENTS (1) LH-3128, S type Table 3 Needle gauge Throat plate Feed dog Needle clamp Presser foot Slide plate (left) asm. Slide plate (right) asm. Code Inch mm $ 1.9 2.0 C 5/32 4.0 226 25206 226 30206 101 47759 101 52650 D 3/16 4.8 226 25305 226 30305 101 47858 101 52759 E 7/32 5.6 226 25404 226 30503 101 47957 101 52858 226 01058 226 00555 F 1/4 6.4 226 25503 226 30602 101 48054 101 52957 G 9/32 7.1 226 25602 226 30800 101 48153 101 53054 H 5/16 7.9 226 25701 226 30909 101 48252 101 53153 K 3/8 9.5 226 25800 226 31006 101 48351 101 53252 W 7/16 11.1 226 25909 226 31105 101 48450 101 53351 L 1/2 12.7 226 26006 226 31303 101 48559 101 53450 M 5/8 15.9 226 26105 226 31402 101 48658 101 53559 226 01157 226 00654 N 3/4 19.1 226 26204 226 31501 101 48757 101 53658 P 7/8 22.2 226 26303 226 31709 101 48856 101 53757 Q 1 25.4 226 26402 226 31808 101 48955 101 53856 226 01256 226 00753 R 1-1/8 28.6 226 26501 226 31907 101 49052 101 53955 S 1-1/4 31.8 226 26600 226 32004 101 49151 101 54052 T 1-3/8 34.9 226 26709 226 32103 101 49250 101 54151 226 01355 226 00852 U 1-1/2 38.1 226 26808 226 32202 101 49359 101 54250 (2) LH-3128, A type Table 4 Needle gauge Throat plate Feed dog Needle clamp Presser foot Slide plate (left) asm. Slide plate (right) asm. Code Inch mm $ 1.4 1.6 A 3/32 2.4 226 25008 226 35007 101 47551 226 37557 B 1/8 3.2 226 25107 226 30107 101 47650 226 37656 C 5/32 4.0 226 25206 226 35104 101 47759 226 37555 D 3/16 4.8 226 25305 226 35205 101 47858 226 37854 E 7/32 5.6 226 25404 226 35403 101 47957 226 37953 226 01058 226 00555 F 1/4 6.4 226 25503 226 35502 101 48054 226 38050 G 9/32 7.1 226 25602 226 35700 101 48153 226 38258 H 5/16 7.9 226 25701 226 35809 101 48252 226 38357 K 3/8 9.5 226 25800 226 35908 101 48351 226 38456 W 7/16 11.1 226 25909 226 36005 101 48450 226 38555 L 1/2 12.7 226 26006 226 36203 101 48559 226 38753 226 01157 226 00654 M 5/8 15.9 226 26105 226 36302 101 48658 226 38852 N 3/4 19.1 226 26204 226 36401 101 48757 226 38951 P 7/8 22.2 226 26303 226 36609 101 48856 226 39157 Q 1 25.4 226 26402 226 36708 101 48955 226 39256 226 01256 226 00753 R 1-1/8 28.6 226 26501 226 36807 101 49052 226 39355 S 1-1/4 31.8 226 26600 226 36906 101 49151 226 39454 T 1-3/8 34.9 226 26709 226 37003 101 49250 226 39553 226 01355 226 00852 U 1-1/2 38.1 226 26808 226 37102 101 49359 226 39652 -2- jintex.in
(3) LH-3128, G type Table 5 Needle gauge Throat plate Feed dog Needle clamp Presser foot Slide plate (left) asm. Slide plate (right) asm. Code Inch mm 2.2 2.0 D 3/16 4.8 226 25305 B1613 512 DOH 101 27358 226 40353 E 7/32 5.6 226 25404 B1613 512 EOH 101 27957 226 40452 F 1/4 6.4 226 25503 B1613 512 FOH 101 48054 226 40551 G 9/32 7.1 226 25602 B1613 512 GOH 101 48153 226 40759 H 5/16 7.9 226 25701 B1613 512 HOH 101 48252 226 40858 K 3/8 9.5 226 25800 B1613 512 KOH 101 48351 226 40957 226 01058 226 00555 L 1/2 12.7 226 26006 B1613 512 LOH 101 48559 226 41252 M 5/8 15.9 226 26105 B1613 512 MOH 101 48658 226 41351 N 3/4 19.1 226 26204 B1613 512 NOH 101 48757 226 41450 P 7/8 22.2 226 26303 B1613 512 POH 101 48856 226 41658 226 01157 226 00654 Q 1 25.4 226 26402 B1613 512 QOH 101 48955 226 41757 R 1-1/8 28.6 226 26501 B1613 512 ROH 101 49052 226 41856 S 1-1/4 31.8 226 26600 B1613 512 SOH 101 49151 226 41955 T 1-3/8 34.9 226 26709 B1613 512 TOH 101 49250 226 42052 226 01256 226 00753 U 1-1/2 38.1 226 26808 B1613 512 UOH 101 49359 226 42151 226 01355 226 00852 (4) LH-3128, F type Table 6 Needle gauge Throat plate Feed dog Needle clamp Presser foot Slide plate (left) asm. Slide plate (right) asm. Code Inch mm 1.4 1.4 B 1/8 3.2 226 25107 226 28002 226 30107 101 47650 101 85957 D 3/16 4.8 226 25305 226 28200 226 35304 101 47858 101 86054 F 1/4 6.4 226 25503 226 28408 226 35502 101 48054 101 86757 226 01058 226 00555 G 9/32 7.1 226 25602 226 28507 226 35700 101 48153 101 86153 H 5/16 7.9 226 25701 226 28701 226 35809 101 48252 101 86856 Asterisk (*) shows throat plate Part No. for tape attaching. -3- jintex.in
(5) LH-3128-7, S type Table 7 Needle gauge Throat plate Feed dog Needle clamp Presser foot Slide plate (left) asm. Slide plate (right) asm. Wiper Code Inch mm $ 2.0 2.0 C 5/32 4.0 226 60302 102 37907 101 47759 101 52650 D 3/16 4.8 226 60401 102 38004 101 47858 101 52759 226 50857 226 50352 102 09230 E 7/32 5.6 226 60500 102 38103 101 47957 101 52858 F 1/4 6.4 226 60609 102 38202 101 48054 101 52957 G 9/32 7.1 226 60708 102 38301 101 48153 101 53054 H 5/16 7.9 226 60807 102 38400 101 48252 101 53153 K 3/8 9.5 226 60906 102 38509 101 48351 101 53252 W 7/16 11.1 226 61003 101 68300 101 48450 101 53351 226 50956 226 50451 102 09500 L 1/2 12.7 226 61102 102 38707 101 48559 101 53450 M 5/8 15.9 226 61201 102 38806 101 48658 101 53559 N 3/4 19.1 226 61300 102 38905 101 48757 101 53658 P 7/8 22.2 226 61409 101 68706 101 48856 101 53757 Q 1 25.4 226 61508 102 39002 101 48955 101 53856 226 51053 226 50550 102 09807 R 1-1/8 28.6 226 61607 101 68904 101 49052 101 53955 S 1-1/4 31.8 226 61706 101 69001 101 49151 101 54052 226 51152 226 50659 102 09906 (6) LH-3128-7, A type Table 8 Needle gauge Throat plate Feed dog Needle clamp Presser foot Slide plate (left) asm. Slide plate (right) asm. Wiper Code Inch mm $ 1.4 1.6 A 3/32 2.4 226 60104 226 65004 101 47551 226 37557 B 1/8 3.2 226 60203 226 65103 101 47650 226 37656 C 5/32 4.0 226 60302 226 65202 101 47759 226 37755 D 3/16 4.8 226 60401 226 65301 101 47858 226 37854 226 50857 226 50352 102 09230 E 7/32 5.6 226 60500 226 65400 101 47957 226 37953 F 1/4 6.4 226 60609 226 65509 101 48054 226 38050 G 9/32 7.1 226 60708 226 65707 101 48153 226 38258 H 5/16 7.9 226 60807 226 65806 101 48252 226 38357 K 3/8 9.5 226 60906 226 65905 101 48351 226 38456 W 7/16 11.1 226 61003 226 66002 101 48450 226 38555 226 50956 226 50451 102 09500 L 1/2 12.7 226 61102 226 66200 101 48559 226 38753 M 5/8 15.9 226 61201 226 66309 101 48658 226 38852 N 3/4 19.1 226 61300 226 66408 101 48757 226 38951 226 51053 226 50550 102 09807 P 7/8 22.2 226 61409 226 66705 101 48856 226 39157 Q 1 25.4 226 61508 226 66804 101 48955 226 39256 R 1-1/8 28.6 226 61607 226 66903 101 49052 226 39355 226 51152 226 50659 102 09906 S 1-1/4 31.8 226 61706 101 49151 226 39454 -4- jintex.in
(7) LH-3128-7, G type Table 9 Needle gauge Throat plate Feed dog Needle clamp Presser foot Slide plate (left) asm. Slide plate (right) asm. Wiper Code Inch mm 2 2.0 D 3/16 4.8 226 60401 102 39101 101 47858 226 40353 226 50857 226 50352 102 09230 E 7/32 5.6 226 60500 102 39200 101 47957 226 40452 F 1/4 6.4 226 60609 102 39309 101 48054 226 40551 G 9/32 7.1 226 60708 102 39408 101 48153 226 40759 H 5/16 7.9 226 60807 102 39507 101 48252 226 40858 K 3/8 9.5 226 60906 102 39606 101 48351 226 40957 W 7/16 11.1 226 61003 101 70801 101 48450 226 41054 L 1/2 12.7 226 61102 102 39804 101 48559 226 41252 226 50956 226 50451 102 09500 M 5/8 15.9 226 61201 102 39903 101 48658 226 41351 N 3/4 19.1 226 61300 101 71106 101 48757 226 41450 P 7/8 22.2 226 61409 101 71205 101 43856 226 41658 102 09807 Q 1 25.4 226 61508 101 71304 101 48955 226 41757 226 51053 226 50550 R 1-1/8 28.6 226 61607 101 71403 101 49052 226 41856 S 1-1/4 31.8 226 61706 101 71502 101 49151 226 41955 226 51152 226 50659 102 09906 -5- jintex.in
(8) LH-3168, S type Table 10 Needle gauge Throat plate Feed dog Needle clamp (left) Needle clamp (right) Presser foot Slide plate (left) asm. Slide plate (right) asm. Code Inch mm $ 2.0 2.0 C 5/32 4.0 226 25206 226 30206 B1402-528-CAO-A 101 52650 D 3/16 4.8 226 25305 226 30404 B1402-528-DALA B1402-528-DARA 101 52579 E 7/32 5.6 226 25404 226 30503 B1402-528-EAL B1402-528-EAR 101 52858 226 01058 226 00555 F 1/4 6.4 226 25503 226 30602 B1402-528-FALA B1402-528-FARA 101 52957 G 9/32 7.1 226 25602 226 30800 B1402-528-GAL B1402-528-GAR 101 53054 H 5/16 7.9 226 25701 226 30909 B1402-528-HALA B1402-528-HARA 101 53153 K 3/8 9.5 226 25800 226 31006 B1402-528-KALA B1402-528-KARA 101 53252 L 1/2 12.7 226 26006 226 31303 B1402-528-LAL B1402-528-LAR 101 53450 M 5/8 15.9 226 26105 226 31402 B1402-528-MAL B1402-528-MAR 101 53559 226 01157 226 00654 N 3/4 19.1 226 26204 226 31501 B1402-528-NAL B1402-528-NAR 101 53658 Q 1 25.4 226 26402 226 31808 B1402-528-QAL B1402-528-QAR 101 53856 226 01256 226 00753 (9) LH-3168, A type Table 11 Needle gauge Throat plate Feed dog Needle clamp (left) Needle clamp (right) Presser foot Slide plate (left) asm. Slide plate (right) asm. Code Inch mm $ 1.4 1.6 B 1/8 3.2 226 25107 226 30107 B1402-528-BA0-A 226 37656 C 5/32 4.0 226 25206 226 35205 B1402-528-CAO-A 226 37755 D 3/16 4.8 226 25305 226 35304 B1402-528-DALA B1402-528-DARA 226 37854 E 7/32 5.6 226 25404 226 35403 B1402-528-EAL B1402-528-EAR 226 37953 226 01058 226 00555 F 1/4 6.4 226 25503 226 35502 B1402-528-FALA B1402-528-FARA 226 38050 G 9/32 7.1 226 25602 226 35700 B1402-528-GAL B1402-528-GAR 226 38258 H 5/16 7.9 226 25701 226 35809 B1402-528-HALA B1402-528-HARA 226 38357 K 3/8 9.5 226 25800 226 35908 B1402-528-KALA B1402-528-KARA 226 38456 L 1/2 12.7 226 26006 226 36203 B1402-528-LAL B1402-528-LAR 226 38753 M 5/8 15.9 226 26105 226 36302 B1402-528-MAL B1402-528-MAR 226 38852 226 01157 226 00654 N 3/4 19.1 226 26204 226 36401 B1402-528-NAL B1402-528-NAR 226 38951 Q 1 25.4 226 26402 226 36708 B1402-528-QAL B1402-528-QAR 226 39256 226 01256 226 00753 -6- jintex.in
(10) LH-3168, G type Table 12 Needle gauge Throat plate Feed dog Needle clamp (left) Needle clamp (right) Presser foot Slide plate (left) asm. Slide plate (right) asm. Code Inch mm $ 2.2 2.0 D 3/16 4.8 226 25305 B1613 512 DOH B1402-528-DALA B1402-528-DAR A 226 40353 226 01058 226 00555 E 7/32 5.6 226 25404 B1613 512 EOH B1402-528-EAL B1402-528-EAR 226 40452 F 1/4 6.4 226 25503 B1613 512 FOH B1402-528-FALA B1402-528-FARA 226 40551 G 5/16 7.1 226 25602 B1613 512 GOH B1402-528-GAL B1402-528-GAR 226 40759 H 5/16 7.9 226 25701 B1613 512 HOH B1402-528-HALA B1402-528-HARA 226 40858 K 3/8 9.5 226 25800 B1613 512 KOH B1402-528-KALA B1402-528-KARA 226 40957 L 1/2 12.7 226 26006 B1613 512 LOH B1402-528-LAL B1402-528-LAR 226 41252 M 5/8 15.9 226 26105 B1613 512 MOH B1402-528-MAL B1402-528-MAR 226 41351 226 01157 226 00654 N 3/4 19.1 226 26204 B1613 512 NOH B1402-528-NAL B1402-528-NAR 226 41450 0 1 25.4 226 26402 B1613 512 QOH B1402-528-QAL B1402-528-QAR 226 41757 226 01256 226 00753 -7- jintex.in
(11) LH-3168-7, S type Table 13 Needle gauge Throat plate Feed dog Needle clamp (left) Needle clamp (right) Presser foot Slide plate (left) asm. Slide plate (right) asm. Wiper Code Inch mm $ 2.0 $ 2.0 C 5/32 4.0 226 60302 102 37907 B1402-528-CAO-A 101 52650 D 3/16 4.8 226 60401 102 38004 B1402-528-DALA B1402-528-DARA 101 52579 226 50857 226 50352 102 09230 E 7/32 5.6 226 60500 102 38103 B1402-528-EAL B1402-528-EAR 101 52858 F 1/4 6.4 226 60609 102 38202 B1402-528-FALA B1402-528-FARA 101 52957 G 9/32 7.1 226 60708 102 38301 B1402-528-GAL B1402-528-GAR 101 52054 H 5/16 7.9 226 60807 102 38400 B1402-528-HALA B1402-528-HARA 101 52153 K 3/8 9.5 226 60906 102 38509 B1402-528-KALA B1402-528-KARA 101 52252 L 1/2 12.7 226 61102 102 38707 B1402-528-LAL B1402-528-LAR 101 52450 102 09500 M 5/8 15.9 226 61201 102 38806 B1402-528-MAL B1402-528-MAR 101 52559 226 50956 226 50451 N 3/4 19.1 226 61300 102 38905 B1402-528-NAL B1402-528-NAR 101 52658 102 09807 Q 1 25.4 226 61508 102 39002 B1402-528-QAL B1402-528-QAR 101 52856 226 51053 226 50550 102 09906 (12) LH-3168-7, A type Table 14 Needle gauge Throat plate Feed dog Needle clamp (left) Needle clamp (right) Presser foot Slide plate (left) asm. Slide plate (right) asm. Wiper Code Inch mm $ 1.4 $ 1.6 B 1/8 3.2 226 60203 226 65103 B1402-528-BA0-A 226 37656 C 5/32 4.0 226 60302 226 65202 B1402-528-CAO-A 226 37755 D 3/16 4.8 226 60401 226 65301 B1402-528-DALA B1402-528-DARA 226 37854 226 50857 226 50352 102 09230 E 7/32 5.6 226 60500 226 65400 B1402-528-EAL B1402-528-EAR 226 37953 F 1/4 6.4 226 60609 226 65509 B1402-528-FALA B1402-528-FARA 226 38050 G 9/32 7.1 226 60708 226 65707 B1402-528-GAL B1402-528-GAR 226 38258 H 5/16 7.9 226 60807 226 65806 B1402-528-HALA B1402-528-HARA 226 38357 K 3/8 9.5 226 60906 226 65905 B1402-528-KALA B1402-528-KARA 226 38456 L 1/2 12.7 226 61102 226 66200 B1402-528-LAL B1402-528-LAR 226 38753 M 5/8 15.9 226 61201 226 66309 B1402-528-MAL B1402-528-MAR 226 38852 226 50956 226 50451 N 3/4 19.1 226 61300 226 66408 B1402-528-NAL B1402-528-NAR 226 38951 102 09500 Q 1 25.4 226 61508 226 66705 B1402-528-QAL B1402-528-QAR 226 39256 226 51053 226 50550 102 09807 102 09906 -8- jintex.in
(13) LH-3168-7, G type Table 15 Needle gauge Throat plate Feed dog Needle clamp (left) Needle clamp (right) Presser foot Slide plate (left) asm. Slide plate (right) asm. Wiper Code Inch mm 3 2 2.0 D 3/16 4.8 226 60401 102 39101 B1402-528-DALA B1402-528-DARA 226 40353 226 50857 102 09230 E 7/32 5.6 226 60500 102 39200 B1402-528-EAL B1402-528-EAR 226 40452 226 50352 F 1/4 6.4 226 60609 102 39309 B1402-528-FALA B1402-528-FARA 226 40551 G 9/32 7.1 226 60708 102 39408 B1402-528-GAL B1402-528-GAR 226 40759 H 5/16 7.9 226 60807 102 39507 B1402-528-HALA B1402-528-HARA 226 40858 K 3/8 9.5 226 60906 102 39606 B1402-528-KALA B1402-528-KARA 22640957 L 1/2 12.7 226 61102 102 39804 B1402-528-LAL B1402-528-LAR 226 41252 102 09500 M 5/8 15.9 226 61201 102 39903 B1402-528-MAL B1402-528-MAR 226 41351 226 50956 226 50451 N 3/4 19.1 226 61300 101 71106 B1402-528-NAL B1402-528-NAR 226 41450 102 09807 Q 1 25.4 226 61508 101 71304 B1402-528-QAL B1402-528-QAR 226 41757 226 51053 226 50550 102 09906 -9- JIN텍.in
3. LIST OF THE MAJOR COMPONENTS (1) List of motor, motor pulley and V-belt Table 16 Without thread trimmer With thread trimmer Model LH-3128, LH-3168 LH-3128-7, LH-3168-7 Frequency 50 Hz 60 Hz Common to 50 Hz and 60 Hz Motor Clutch motor MTL2200040S SC-1 AC servo motor 200V M0001351AA0 M6101351AA0 Motor pulley 070 MTKP0070000 060 MTKP0060000 080 MTSP00800B0 V-belt 42" MTJVH004200A 41" MTJVH004100A 40" MTJVH004000A (2) List of expendable parts Table 17 Without thread trimmer With thread trimmer Part No. Part name Part No. Part name B9117051000 Bobbin 10210805 Bobbin 22612055 Latch hook (asm.) 22653158 Latch hook (asm.) with thread trimmer 22612758 Cap hook (asm.) 22653059 Cap hook asm. with thread trimmer 22688253 Hook (asm.) for an organized split needle bar 22693857 Hook (asm.) for an organized split needle bar and a thread trimmer. 22603708 Felt 10211605 Moving knife 10210805 Bobbin (F type) 22655302 Counter knife 22655401 Thread presser 22603708 Felt -10- jintex.in
(3) Other renewal parts Table 18 Without thread trimmer With thread trimmer LH-3128, LH-3168 LH-3128-7, LH-3168-7 Part No. Part name Part No. Part name 22601504 Slide plate window 22601504 Slide plate window 22604300 Timing belt 22604300 Timing belt B3128051000 Thread take-up spring (A) B3128051000 Thread take-up spring (A) B3128527000 Thread take-up spring (B) B3128527000 Thread take-up spring (B) 22628903 Idling prevention sheet (0.3) 10111508 Idling prevention spring 22653802 Idling prevention sheet - 11 - jintex.in
4. SPECIAL NOTES FOR SAFE OPERATION (1) For the LH-3128 and -3168 models of sewing machine without a thread trimmer, the throat plate, feed dog and presser foot developed for the LH-512 or -515 are applicable. Furthermore, commercially available thread trimmer, throat plate, feed dog and presser foot can also be used with them. (2) When putting a V-belt on the handwheel of the sewing machine head and the motor pulley, adjust the position of the motor so that the V belt is tensed to the extent where it slackens by approximately 10 mm when the center of the belt is pressed by hand. (3) Fill the oil pan with sewing machine oil (New Defrix Oil No. 2) until the H mark is reached. (4) When you operate your machine for the first time after the set-up or after an extended period of disuse, apply a few drops of oil to the portions indicated by the arrow in Fig. 1. 1) Main unit of the machine arm (Pour oil from the plug hole.) 2) Face plate 3) Hook driving shaft saddle 4) Hook race surface (left and right) Fig. 1 - 12 - jintex.in
(5) Hook differs with the type of sewing machine, i.e., the sewing machine with/without a thread trimmer. Be sure to use a hook that is exclusively designed for the sewing machine head. For the LH-3128 and -3168 models of sewing machine without a thread trimmer, commercially available hooks can be used. (6) How to pass the bobbin thread (The bobbin thread winding direction is indicated by the arrow.) 1) LH-3128 Latch hook LH-3128-7 Latch hook with a thread trimmer Fig. 2 3) LH-3168 Hook for an organized split needle bar LH-3168-7 Hook with a thread trimmer and an organized split needle bar Fig. 4 2) LH-3128 Cap hook LH-3128-7 Cap hook with a thread trimmer Fig. 3 (7) When synthetic threads are used, use the thread guide arm (asm.) for the thread stand if the thread flaps during sewing. Thread guide arm (asm.) Fig. 5 Thread stand (asm.) -13- jintex.in
5. STANDARD ADJUSTMENT STANDARD ADJUSTMENT (1) Needle bar and feed dog 1) Initial position of the needle bar Conditions • The needle bar is in the lowest dead point. • Feed amount (stitch length): 0 • LH-3128, LH-3128-7 3 13.5±0.1 Top surface of the throat plate Fig. 6 • LH-3168, LH-3168-7 14.2±0.1 Top surface of the throat Fig. 7 2) Position and height of the feed dog Conditions • Feed amount (stitch length): 0 • When the feed dog is in the highest position of its stroke, it should rise 0.9 to 1.1 mm from the top surface of the throat plate. Fig. 9 Clearance Top surface of the throat plate 0.9 to 1.1 mm Fig. 10 Feed bar Feed bar Feed rock shaft Fig. 11 Gear of the hook driving shaft Fig. 12 Hook driving shaft saddle -14- jintex.in
HOW TO ADJUST 1. Set the stitch dial at "0" on the scale. 2. Turn the handwheel to bring needle bar to the lowest dead point. 3. Loosen screw ④ shown in Fig. 8. 4. Adjust the inner dimension provided between needle bar ① and presser bar ② to the specified dimension. Then, tighten screw ④. Feed rock shaft crank Feed rock shaft Fig. 8 (Caution) 1. Distance from needle bar ① to presser bar ② should be the distance provided between the bot- tom end of the presser bar and the bottom end of presser bar lower bushing ③. 2. After the adjustment, the needle entry point in the needle slot in the feed dog may change. RESULTS OF IMPROPER ADJUSTMENT When the stitch length is maximized, the feed dog will come in contact with the feed dog. Stitch skipping or needle breakage will be caused. Thread trimming failure will be caused. Position of the feed dog 1. Attach feed dog ① to the bed using screws ④. Attach throat plate ② to the bed using screws ③. 2. Loosen clamping screw ⑤ in the feed rocker in Fig. 11. Move feed rocker ⑥ in the axial direction to adjust so that respective feed dogs ① teeth are equidistantly spaced in feed dog slots ② in the throat plate as illustrated in Fig. 9. After the adjustment, tighten screw ⑤. 3. If the position of the feed dog is not properly adjusted by the procedure described above, suppose that feed dog ① has been attached with inclined. So, loosen screws ④, and adjust the inclination angle of the feed dog ① to "0." Then, tighten screws ④ and perform the aforementioned step 2). Height of the feed dog 1. Set the stitch dial at "0" on the scale. 2. Turn the handwheel to bring feed dog ① to the position where it rises the most above throat plate ②. 3. Loosen screw ⑦ in Fig. 12, and move feed bar lifting fork up or down to adjust so that feed dog ① rises 0.9 to 1.1 mm above the top surface of throat plate ②. Then, tighten screw ⑦. (Caution) 1. After the adjustment, the needle entry point in the needle slot in the feed dog may change. When the feed dog is positioned too high: The feed dog will come in contact with the throat plate. The stitch length will be larger than the value indicated by the scale on the stitch dial. Thread trimming failure will occur. When the feed dog is positioned too low: The stitch length will be smaller than the value indicated by the scale on the stitch dial. The moving knife will come in contact with the feed dog at the time of thread trimming resulting thread trimming fail- ure. -15- jintex.in
STANDARD ADJUSTMENT 3) Needle bar height Conditions Needle bar should be in its lowest dead point. Feed amount (stitch length): 0 LH-3128, S, A and G type LH-3128-7, S, A and G type Meets with the upper engraved marker line Marker lines engraved on the needle bar Fig. 13 LH-3128, F type (43±0.1) Top surface of the throat plate 12.4±0.1 Fig. 14 LH-3168, S, A and G type LH-3168-7, S, A and G type Table 19 LH-3168 LH-3168-7 a 12.6±0.15 11.5±0.15 Top surface of the throat Fig. 15 -16- jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT Change in height of the needle bar may result in stic skipping or thread breakage. o LH-3128S, -3128A, -3128G LH-3128-7S, -3128-7A, -3128-7G Needle bar connection 1. Set the stitch dial at "0." 2. Turn the handwheel to bring needle bar 1 to the lowest dead point. 3. Loosen clamping screw 7. 4. Align the upper marker line engraved on needle bar 1 with the lower surface of needle bar frame 2. Then, tighten clamping screw 7. Fig. 16 o LH-3128F 1. Set the stitch dial at "0." 2. Turn the handwheel to bring needle bar 1 to the lowest dead point. 3. Loosen clamping screw 7. 4. Adjust so that bottom end of needle clamp 3 is spaced 12.4 ±0.1 mm from the top surface of the throat plate. Then, tighten clamping screw 7. * The two marker lines engraved on the needle bar are ineffective. o LH-3168S, -3168A, -3168G LH-3168-7S, -3168-7A, -3168-7G The needle bar height is determined by the height of the needle clamp. Needle clamp 6 goes up or comes down by 0.6 mm in one revolution. Remove screw 5 and move needle clamp 6 up or down. Spring shoe 8 goes up or comes down by 0.3 mm in one revolution. Remove screws 4 and 5, draw out needle clamp 6 from needle bar 1, and turn spring shoe 8. 1. Set the stitch dial at "0." 2. Turn the handwheel to bring needle bar 1 to the lowest dead point. 3. Turn needle clamp 6 and/or spring shoe 8 to adjust the clearance provided between the bottom of the needle bar and the top surface of the throat plate to dimension a shown in Table 19. Then tighten screws 4 and 5. (Caution) 1. After the adjustment, the needle entry point in the needle slot in the feed dog may change. Fig. 17 -17- jintex.in
STANDARD ADJUSTMENT 4) Needle entry Conditions Needle bar should be in the lowest dead point. Feed amount (stitch length): 0 The needle should enter the center of the needle slot in the feed dog. 1 Needle slot in the feed dog Fig. 18 Feed dog Feed bar Feed rock shaft Fig. 20 LH-3168 LH-3168-7 Fig. 19 LH-3128 LH-3128-7 Needle bar connection Fig. 21 -18- jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT • LH-3128, -3128-7 1. Attach needle ① to needle clamp ②. 2. Set the stitch dial to "0." 3. Turn the handwheel to bring needle bar ③ to the lowest dead point. 4. Loosen clamping screw ④. 5. Turn needle bar ③ to adjust so that needle ① enters the center of the needle slot in feed dog ⑤. After the adjustment, tighten screw ④. 6. If needle ① is longitudinally dislocated in the needle slot in the feed dog, loosen clamping screw ⑥ in feed rocker ⑦ and adjust the longitudinal position of the needle by turning feed rocker ⑦. After the adjustment, tighten screw ⑥. (Caution) 1. Do not change the needle bar height. 2. Do not loosen needle clamp ②. • LH-3168, -3168-7 1. Attach needle ① to needle clamp ②. 2. Set the stitch dial to "0." 3. Turn the handwheel to bring needle bar ③ to the lowest dead point. 4. Loosen clamping screws ⑧ and ⑨. 5. Turn needle clamp ② to adjust so that needle ① enters the center of the needle slot in feed dog ⑤. After the adjustment, tighten screws ⑧ and ⑨. 6. If needle ① deflects in the longitudinally direction of the needle slot in the feed dog, loosen screw ⑥ and properly adjust the longitudinal position of the needle in the needle slot by turning feed rocker ⑦. After the adjustment, tighten screw ⑥. (Caution) 1. Needle clamp ② can be turned in the clearance provided between screw ⑧ and the rightmost and leftmost edges of the slot in the needle bar. • Stitch skipping and thread breakage will be caused. • Poorly tensed seam will result. • When the feed dog has elongated needle slots (2 mm x 3 mm), the needle thread will be loosened if the needles enter the far end of the respective elongated slots, as viewed from the operator. • When the feed dog has elongated needle slots, thread trimming failure will result if the needles enter the near end of the re- spective elongated slots, as viewed from the operator, at the time of thread trimming. -19- jintex.in
STANDARD ADJUSTMENT (2) Needle-to-hook relation Conditions • The needle bar ascends from the lowest dead point of its stroke. • Feed amount (stitch length): 2.5 (For G type, it should be set at 3.5.) 1) Lift of the needle bar LH-3128 LH-3128-7 Lift of the needle bar when the lower marker line on the needle bar meets the bottom end of the needle bar frame: a=2.2mm Fig. 22 3) Position of the needle and the blade point of the hook Center of the needle aligns with the blade point of the hook. Fig. 24 2) Clearance between the needle and the blade point of the hook 0~0.05 mm Fig. 23 Table 20 a mm b mm S. A. G 2.2 1.2 F 3.2 0.9 0.5 mm Fig. 25 - 20 - jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT To adjust the clearance between the needle and the blade point of the hook and the needle gauge 1. For the sewing machine with a thread trimmer, loosen hinge screw 16 in the connecting link in Fig. 27 on page 22. 2. Loosen screws 1 and 2 in the hook driving shaft saddle and two screws 6 in the hook driving gear. At this time, do not remove the screw No. 1 (retained in the flat section of hook driving shaft 7). Loosen the screw to such an extent that the screw No. 1 does not come hook driving shaft when turning hook driv- ing shaft 7 by hand. 3. For the sewing machine of which sewing specification is S, A or F, set the stitch dial at 2.5 on the scale. For the sewing machine of which sewing specification is G, set the stitch dial at 3.5 on the scale. 4. Raise needle bar 9 from the lowest dead point of its stroke by di- rection a. At this time, align the lower marker line engaged on needle bar 9 with the bottom end face of needle bar frame 10, and the lift of the needle bar will be 2.2 mm. 5. Move hook driving shaft saddle 3 to the right or left to adjust so that the specified clearance is provided between the needle and the blade point of the hook and the needle guard provides the specified effective amount. Then, tighten screws 1 and 2 to secure hook driving shaft saddle. 6. Adjust so that an approximately 0.5 mm clearance is provided be- tween hook driving shaft screw gear 5 and hook driving shaft saddle 3. Then fix hook driving shaft screw gear 5 by tighten screws 6. 7. Attach connecting link (asm.) 2 in position using hinge screw 16 as illustrated in Fig. 27 on page 22. To change the position of the needle and the blade point of the hook 1. Loosen three screws 12 in hook driving shaft gear 11 in Fig. 26. 2. Align the blade point of the hook with the center of the needle, and tighten screws 12. Fig. 26 (Caution) 1. Confirm that hook driving shaft gear 5 does not come in contact with hook driving shaft saddle 3 and hook driving shaft gear guide 4. Stitch skipping or thread breakage will re- sult. -21- jintex.in
STANDARD ADJUSTMENT 4) Position of the connecting link (asm.) and rocking arm plate LH-3128-7, LH-3168-7 Fig. 27 Conditions • Rocking arms (left) and (right) should come in contact with the respective rocking arm stopper screws. • The cam roller shaft should come in contact with the follower stopper. (3) Initial position of the bobbin case opening lever Conditions • The bobbin case opening lever should be moved backward until it will go no further. • Press the bobbin case stopper against the throat plate ribs. Press the bobbin case stopper against the throat plate ribs. Backward travel end 0.1 to 0.3 mm Fig. 28 - 22 - jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT 1. Loosen two screws 1 in connecting link (asm.) 2 and screw 3 in rocking arm plate 4 in prior to the adjustments 1), 2) and 3) of (2) on page 20. 2. After you have finished the adjustments 1), 2) and 3) of (2) on page 20, adjust the length of connecting link (asm.) 2 so that rocking arm (left) 9 and rocking arm (right) 10 come in contact with stop- per screw 11 in the rocking arm. Then tighten screw 3. 3. To adjust rocking arm plate 4, turn cam follower (asm.) 13 and joint rod 12 in direction C or D so that cam roller shaft 14 comes in contact with follower stopper plate 15. Then tighten screw 3. (Caution) 1. Do not leave screws 1, 3 loosened. Doing so will cause the sewing machine lock at the time of thread trimming. If the connecting link (asm.) and the rocker arm are not properly positioned, thread trim- ming failure will result. 1. Turn the handwheel to move bobbin case opening lever 2 back- ward until it will go further. 2. Turn bobbin case 3 in the direction opposite to the direction of rota- tion of the hook until bobbin case stopper 4 comes in contact with throat 5. 3. Loosen screw 1 in the bobbin case opening lever and adjust so that a 0.1 to 0.3 mm clearance is provided between bobbin case 3 and bobbin case opening lever 2. Then tighten screw 1. If the clearance between the bobbin case and the bobbin case opening lever is larger than the specified value: O Towel-like stitches, loosened stitches or thread breakage will result. If the clearance is smaller than the specified value: O The bobbin case may break. -23- jintex.in
STANDARD ADJUSTMENT (4) Clearance between the throat plate and the bobbin case stopper • A clearance of 0.8 to 1.0 mm should be provided between the top surface of the groove on stopper of the throat plate and the top surface of the stopper of the bobbin case. Throat plate Bobbin case stopper 0.8 to 1.0 mm Hook driving shaft upper bushing thrust plate Hook driving shaft upper bushing spacer Fig. 29 Fig. 30 Table 21 Part No. Name of part Engraved mark Thickness Sewing machine with a thread trimmer 10109700 Hook driving shaft upper bushing thrust plate A 0 1 10110906 " C 1 1.1 10111003 " D 2 1.2 10111102 " E 3 1.3 10111201 " F 4 1.4 10109809 " B 5 1.5 10112506 " G 6 1.6 10112605 " H 7 1.7 10112704 " K 8 1.8 Sewing machine without a thread trimmer 10112506 Hook driving shaft upper bushing thrust plate G 6 1.6 10112605 " H 7 1.7 10112704 " K 8 1.8 22614002 Hook driving shaft upper bushing spacer A A 1.9 22614101 " B B 2.0 22614200 " C C 2.1 22614309 " D D 2.2 22614408 " E E 2.3 22614507 " F F 2.4 - 24 - jintex.in
HOW TO ADJUST 1. Remove the throat plate bobbin case opening lever, feed dog and needle. 2. Loosen three screws which are used to secure the hook driving shaft gear. 3. For the sewing machine equipped with a thread trimmer, also remove the moving knife and counter knife. 4. Draw out the hook. 5. Replace the thrust plate and spacer of the hook driving shaft upper bushing with appropriate ones. * Thrust plates and spacers of the hook driving shaft upper bushing are prepared respectively for the sewing machine with/without a thread trimmer. Hook driving shaft Felt Fig. 31 (Caution) 1. A lubricating felt is placed on the bottom of the hook driving shaft of this sewing machine. So, do not tighten the screw with the hook raised. Doing so will cause an axial play, resulting in thread trimming failure, stitching troubles or breakage of the hook point. RESULTS OF IMPROPER ADJUSTMENT If the clearance provided between the throat plate and the bobbin case stopper is larger than the specified value: The bobbin case may come off the throat plate. If the clearance provided between the throat plate and the bobbin case stopper is smaller than the specified value: Isolated idling loops will result. Moving knife will come in contact with the hook at the time of thread trimming. - 25 - jintex.in
STANDARD ADJUSTMENT (5) Feed timing Condition • The marker dot engraved on the hook driving shaft should be aligned with the marker dot engraved on the feed rock cam. Bed (As viewed from the rear of the bed) Fig. 32 Marker dot on the hook driving shaft Feed rock cam Marker dot on the feed rock cam Feed rock rod Hook driving shaft Feed rock cam Marker dot on the hook driving shaft Marker dot on the feed rock cam Aligned (6) Relation between the main shaft and the hook driving shaft Marker dot on the machine arm Blue marker dot on the handwheel (40°) Screw No. 1 04mm hole Fig. 34 Fig. 35 - 26 - jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT 1. Loosen screws 1 and 2 in the feed rock cam. 2. Align the marker dot engraved on the feed rock cam with the marker dot engraved on the machine arm. (Caution) The adjustment result of the feed timing will be affect- ed by the position from which you observe the marker dots. So, be sure to adjust the feed timing while observing the marker dots from the correct position. If the feed timing shifts in the axial direction while adjusting the feed timing, an extra load will be applied to the cam. So, be careful. Late Fig. 33 Early O If the feed timing is changed, the needle entry in the slot in the feed dog will also change. In this case, properly adjust the needle entry with respect to the feed dog. 1. Remove the timing belt from lower sprocket 2 of the hook driving shaft. 2. Turn handwheel 1 until the blue marker dot engraved on the handwheel is aligned with the marker dot engraved on the machine arm. 3. Turn hook driving shaft 3 until the screw No. 1 is aligned with the 4 mm hole in the bed. 4. Put the timing belt on lower sprocket 2 while securely keeping the main shaft and hook driving shaft held in the correct position. (Caution) 1. Confirm that the screw No. 1, that is aligned with the 4 mm hole in the bed, rests on the flat section of the hook driving shaft. If the relation between the main shaft and the hook driving shaft is not correct: O Thread trimming timing, needle entry in the feed dog slot and feed timing will change, causing the sewing machine to be locked. So, carefully adjust the relation between the aforementioned shafts. -- 27 -- jintex.in
STANDARD ADJUSTMENT (7) Lubrication 1) Amount of oil in the face plate A sheet of paper Fig. 37 Fig. 36 Adequate amount of oil One minute Conditions Oil splashes are made on a sheet of paper while making the sewing machine run for one minute after having made it run idle for one minute. Detailed figure of portion A 0 to 3 mm Fig. 38 Face plate oil amount adjusting felt Face plate oil pipe (asm.) - 28 - jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT 1. Loosen locknut 1 of the face plate oil amount adjusting screw. 2. Move face plate oil amount adjusting screw 2 up or down. Tight- ening the screw will decrease the amount of oil in the face plate. Loosening the screw will increase it. 3. After the amount of oil is properly adjusted, tighten locknut 1. (Caution) 1. Adjust the height of face plate oil amount adjusting screw 2 within the range of 0 to 3 mm taking the height of the top face of locknut 1 for reference. Then, fix the screw. 2. Do not leave locknut 1 in the loosened state. o If the amount of oil is insufficient, the needle bar crank or the needle bar crank rod will be seized. o If the amount of oil is excessive, oil leak- age will result. - 29 - jintex.in
STANDARD ADJUSTMENT 2) Amount of oil in the hook Adequate amount of oil Fig. 39 Conditions Oil splashes are made on a sheet of paper while making the sewing machine run for five seconds after having made it run idle for two minutes. A sheet of paper Oil amount adjusting screw Oil amount decreases + Oil amount increases Hook (8) Stitch length in the normal feed stitching and reverse feed stitching Conditions When the stitch dial is set at "3," the difference in the stitch length between the normal feed stitching and reverse feed stitching should be 0.2 mm or less. Feed regulator base Screw Reverse feed control lever shaft E ring Large Spring Small Marker dot Feed regulating rod Fig. 41 - 30 - jintex.in
HOW TO ADJUST 1. Adjust the amount of oil in the hook using oil amount adjusting screw mounted on the hook driving shaft saddle. Tightening the screw will decrease the amount of oil in the hook. Tightening the screw will increase it. (Caution) Adjust the position of the oil amount adjusting screw referring to Fig. 40. Approx. 30 mm Fig. 40 1. Set the stitch dial at "3." 2. Loosen two screws 1 in the feed regulator base. 3. Move feed regulator base pin 2 in the direction of the arrow to adjust so that a difference in stitch length between the normal feed stitching and the reverse feed stitching to 0.2 mm or less. RESULTS OF IMPROPER ADJUSTMENT o If the amount of oil in the hook is insuffi- cient, poorly-tensed seam will result. Furthermore, the hook will become hot causing seizure. o If the amount of oil in the hook is exces- sive, the thread will be stained with oil. The material will also be stained with oil. o The stitch length for the reverse feed stitch- ing will be different from that for the nor- mal feed stitching. -31- jintex.in
STANDARD ADJUSTMENT (9) Synchronizer 1) Installing the synchronizer Fig. 42 Fig. 43 1±0.2 mm Fig. 44 2) Needle-up stop position of the sewing machine Marker dot on the machine arm Fig. 45 Fig. 46 3) Needle-down stop position of the sewing machine Fig. 48 - 32 - jintex.in
HOW TO ADJUST How to replace the synchronizer 1. Remove the bolt cover. Loosen screws 1 in the handwheel and remove handwheel 3. 2. Remove the screw in the cable metal fittings and remove two screws 2 in stator of the generator. Then, remove stator 4. 3. Fix a new stator using screws 2. 4. Place the cable in the cable metal fittings and tighten the screw. 5. Assemble the handwheel 3, making sure that the screw No. 1 comes in contact with the flat section of the main shaft. Also adjust the lateral position of the handwheel so that a 1±0.2 mm clearance is obtained between stator 4 and handwheel 3. 6. Route the cable properly and put the V belt on the handwheel. 7. Install the belt cover. 8. Adjust the needle-up stop position of the sewing machine using screw 5 in the magnet mounting base of the handwheel. (How to adjust) Stop the needles. Loosen screw 1 and adjust the needle-up stop position of the sewing machine within the range of the slot. • To advance the needle-up stop timing of the sewing machine → Move the screw in direction A. • To retard the needle-up stop timing of the sewing machine → Move the screw in direction B. (Caution) 1. Do not run the sewing machine with screw 1 loosened, while and after making the adjustment. Only loosen screw 1 and never remove it. (How to adjust) Loosen screw 1, and move the screw in direction A until it will go no further. Then, tighten screw 1. (Caution) 1. Do not run the sewing machine with screw 1 loosened, while and after making the adjustment. Only loosen screw 1 and never remove it. RESULTS OF IMPROPER ADJUSTMENT • The stator is made of plastic. So, tighten the screw with an approximately 15 kg.cm torque. • Confirm that the handwheel does not inter- fere with the stator. • Confirm that the V belt does not come in contact with the cable. • Attach the belt cover to the sewing ma- chine. Making the sewing machine run at low speed, check that there is not any rub- bing noise. Early Fig. 47 Late • If the needle-up stop position of the sew- ing machine is not properly adjusted, thread trimming failure will result. The cam roller will not come off the thread trimming cam at the time of thread trim- ming, but will come off from the cam at the start of next sewing with a noise. The timing to detect the needle-down stop position of the sewing machine should be advanced the most. If the timing is retarded, troubles will result such that the thread trimmer fails to cut the thread, reverse-feed stitches may not to be sewn accurately on the normal-feed stitches at the time of automatic reverse stitching or the needle thread will be insufficiently tensed at the corner of a mate- rial at the time of sewing the corner. -33- jintex.in
STANDARD ADJUSTMENT (10) Initial position of the conversion lever LH-3168, LH-3168-7 Conditions Section A of the conversion lever is set at the "0" position of the thread tension plate, the leftmost end face of the needle bar frame is almost aligned with the standard line of the slider. Fig. 49 Conversion plate Standard line Slider escape spring Fig. 50 Fig. 51 - 34 - jintex.in
HOW TO ADJUST 1. Turn the handwheel to bring the needle bar to the lowest dead point. 2. Press conversion fixing lever ① to release conversion lever ②. 3. At this time, confirm that section A of conversion lever ② is aligned with the "0" position of thread tension plate ③. 4. If they are not aligned with each other, loosen conversion shaft clamping screw ⑤ as illustrated in Fig. 51, and align section A of conversion lever ② with the "0" position of thread tension plate ③. Then, firmly tighten conversion arm clamping screw ⑥. (Caution) 1. Do not loosen two screws ⑥ in the conversion lever. 2. When tightening conversion arm clamping screw ⑤, using conversion lever ② and conversion arm ④. If there is a play at the clamping screw, conver- sion lever ② will be pushed against conversion plate ⑦. In this case, the function to stop either needle bar separately will not work normally, the separately-stopped needle will not be released from the stop state or needle bar breakage will occur. RESULTS OF IMPROPER ADJUSTMENT If the initial position of the conversion lever is not correct, the function to separately drive the needle bars will not work properly. -35- jintex.in
6. STANDARD ADJUSTMENT OF THE ATTACHMENTS STANDARD ADJUSTMENT (1) Thread trimmer 1) Vertical position of the moving knife Conditions • The moving knife should come in contact with the moving knife rest and should not be pushed against the moving knife rest when the knife oscillates. Align Fig. 52 2) Initial position of the counter knife and thread presser Align Conditions • Only loosen the screw in the counter knife and never remove it. Fig. 53 3) Clamp pressure Increases Decreases Fig. 54 Moving knife Thread presser If the moving knife comes in single-sided contact with the thread presser, the thread will come off the needle thread clamp. The figure shown above illustrates the state of contact between the perser, the thread will come off the needle thread clamp. underside of moving knife and the thread pressure. - 36 - jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT 1. Remove the counter knife, thread presser and rocker arms (left and right) from hook driving shaft saddle 6. 2. Loosen two screws 1 in moving knife shaft thrust collar. 3. Move moving knife shaft joint 3 up or down to adjust the height of thrust collar 2 so that moving knife 4 comes in contact with moving knife rest 5 and moving knife 4 is not pushed against moving knife rest 5 when rocker moving knife 4. After the adjustment, fix thrust collar 2. 1. Loosen screw 1 in the counter knife. Do not remove the screw from the knife. 2. Align the rear end of counter knife 2 with section L of thread pres- ser 3. Then, simultaneously move the counter knife and thread presser back in direction A until they will go no further. 3. Keeping thread presser 3 held in the backward travel end, move counter knife 2 forward in direction B by 1 mm. 4. Tighten screw 1 in the counter knife. (Caution) 1. Be sure to correctly adjust the initial position of the counter knife and thread presser. The initial posi- tion of the moving knife is determined by the posi- tion of the counter knife. 1. The underside of the moving knife comes in contact with the thread presser when the thread presser, moving knife and counter knife are installed on the sewing machine. 2. In the aforementioned state, make the thread presser adjusting metal fitting with the thread presser. Loosen screw 2, and perform the adjustment by turning screw 1. After the adjustment, tighten screw 2. If the thread is not properly clamped by the thread presser even when the aforementioned two adjustment steps have been properly performed: * Loosen screw 2, and turn screw 1 in the direction of the arrow to adjust the clamping pressure of the thread presser. After the adjustment, tighten screw 2. For reference of the ade- quate pressure of the thread presser, tighten screw 1 by 90° from the position at which the thread presser adjusting metal fitting comes in contact with the thread presser. If the pressure of the thread presser is insuf- ficient: O Stitch skipping will occur when changing the thread from a thick one to a thin one. If the presser of the thread presser is exces- sive: O Several stitches will skip at the start of sewing. If the shape of the thread presser is defective: As viewed from this side O Bobbin thread clamp failure will be caused. O Needle thread clamp failure will occur. O Normal --37-- jintex.in
STANDARD ADJUSTMENT 4) Initial position of the moving knife Fig. 55 Hook driving shaft saddle (left) Fig. 56 Moving knife rest Hook driving shaft saddle No clearance 34 Fig. 57 Align Align 8 7 Conditions Top end of the counter knife should be spaced 0.8±0.4 mm away from the top end of the moving knife. Rocker arms (left and right) should be aligned with the stopper screw. No clearance should be provided between the rocker arms (left and right) and the hook driving shaft saddle and be- tween the moving knife shaft thrust collar and the saddle. - 38 - jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT 1. Turn moving knife 2 to adjust so that the top end of counter knife 1 is spaced 0.8±0.4 mm from the top end of moving knife 2. 2. Fit rocker arm (left) 3 and rocker arm (right) 4 into moving knife shaft joint 5 and make them come in contact with respective stop- per screws 7. 3. Adjust the thrust section using thrust collar 6, rocker arm (left) 3 and rocker arm (right) 4. Then tighten screws 8 and 9. (Caution) 1. Confirm that the top end of counter knife 1 is 0.8±0.4 mm away from the top end of moving knife 2 when rocker arm (left) 3 and rocker arm (right) 4 are pressed against respective stopper screws 7. If the distance between the top end of the moving knife and that of the counter knife is larger than the specified value: Thread trimming failure will result. Bobbin thread clamp failure will occur. If the distance between the top end of the moving knife and that of the counter knife is smaller than the specified value: Bobbin thread clamp failure will occur. The bobbin thread and needle thread will fail to interlace with each other at the start of sewing. (Failed stitches at the start of sewing) Fig. 58 * If a bobbin thread clamp failure occurs after replacing the feed dog, particularly when the feed dog with a round needle hole is replaced by one with a slot, lower the moving knife (i.e., decrease the distance (0.8±0.4mm) from the moving knife to the counter knife). - 39 - jintex.in
STANDARD ADJUSTMENT 5) Position of the thread trimming cam and the thread trimming timing Fig. 59 Minimize the clearance while preventing a contact. Fig. 60 Marker dot (red) on the handwheel Marker dot on the machine arm (reference) Press End of lobe Cam roller The cam roller reaches the R (round) portion located this side of the end of lobe. Cam groove Fig. 61 --40-- jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT 1. Move thread trimming cam ④ in the lateral direction in terms of hook driving shaft ⑧ to minimize the clearance provided between cam roller ③ and plane A of thread trimming cam as long as they are not pushed against each other when cam roller shaft ② comes in contact with the follower stopper plate ①. Then, temporarily tighten screw ⑤ in the thread trimming cam. 2. Pressing hook driving shaft thrust collar ⑥ against the rightmost end face of thread trimming cam ④, securely tighten two screws ⑦. 3. Loosen screws ⑤. 4. Turn handwheel ⑨ until the marker dot engraved on the machine arm is aligned with red marker dot engraved on the handwheel. 5. Fit cam roller ③ of cam follower (asm.) ⑩ in the groove on thread trimming cam ④. (Press cam follower (asm.) ⑩ in the axial direction of cam follower shaft ⑪.) 6. Tighten two screws ⑤ to fix thread trimming cam ④ when cam roller ③ is aligned with R (round) portion located this side of the end of lobe of thread trimming cam ④ and also comes in contact with plane A of the cam groove on thread trimming cam ④. (Caution) Checking the thread trimming timing 1. Pressing cam follower (asm.) ⑩ in direction B, gradually turn handwheel ⑨ in the reverse direc- tion (away from the operator). 2. Handwheel ⑨ will be hitched when cam roller ③ of cam follower (asm.) ⑩ reaches the R (round) portion of the cam groove on thread trimming cam ④. Now, confirm the red marker dot engraved on the handwheel is aligned with the marker dot engraved on the machine arm. Thread trimming timing is excessively advanced. Fig. 62 Thread trimming timing is excessively retarded. If the thread trimming timing is excessively advanced: Needle thread will come of the needle eyelet. Thread trimmer will fail to operate nor- mally, which will result in thread trim- ming failure. Needle thread clamp failure will occur at the time of thread trimming. If the thread trimming timing is excessively retarded: The needle will interfere with the wiper. Thread trimming failure will occur. -41- jintex.in
STANDARD ADJUSTMENT 6) Position of the thread trimming magnet Conditions When the thread trimming solenoid is in the OFF state, a clearance of 0.8 to 1.2 mm should be provided between the leftmost end face of the thread trimming cam and the end face of the presser plate driving screw. It is recommended not to disassemble the components unless disassembling them is really necessary. Cam follower (asm.) 0.8 to 1.2 mm Fig. 63 Thread trimming magnet Hook driving shaft 7) Rising amount of the tension disk when releasing the thread tension Conditions A clearance of 1 mm should be provided between the tension disks when the thread tension release arm is locked by the thread tension release plate after the arm has rocked the most. Large Small Cam roller shaft 1 mm Fig. 64 - 42 - jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT 1. Loosen two screws 1 in follower presser plate (asm.) 2. 2. Move follower presser plate (asm.) 2 to adjust so that a 0.8 to 1.2 mm clearance is provided between the leftmost end face of thread trimming cam 3 and presser driving screw 4. Then tighten screws 1. If the clearance between the thread trimming cam and the presser plate driving screw is too large: O Thread trimming failure will be caused. (Caution) 1. Determine the position of follower presser plate (asm.) 2 so that follower presser plate 5 is in parallel to the leftmost end face of thread trimming cam 3. 2. When replacing a component contained in follower presser plate (asm.) 2, attach a new part in posi- tion while preventing the part from being pressed against the related components by moving the plunger of the presser plate shaft and plunger in the axial direction at any desired position (in terms of 360°). If the clearance between the thread trimming cam and the presser plate driving screw is too small: O Thread trimmer will actuate repeatedly, causing the thread trimmer to break. 1. Pressing presser plat shaft 6 in the direction of the arrow as shown in Fig. 65, turn the handwheel in the normal direction of rotation to make the thread trimmer actuate. 2. When thread tension release arm 1 rocks and thread tension release wire 2 is drawn the most, thread tension release plate 3 and thread tension release cam 4 will be locked. 3. Loosen nut 4 and adjust thread tension release wire 2 so that a clearance of 1 mm is provided between the tension disks. After the adjustment, tighten nut 4. If the clearance provided between the tension disks is too large: O Related components will break. If the clearance provided between the tension disks is too small: O The remaining length of the needle thread will be decreased. O The needle thread will slip off the needle eyelet. Press Follower presser plate (asm.) Thread trimming cam Fig. 65 -43- Jinttex.in
STANDARD ADJUSTMENT 8) Position of the follower guide Conditions When the cam roller shaft comes in contact with the follower stopper plate (Figs. 59 and 60 on page 40), a clearance of 0.2 to 0.3 mm should be provided between the follower guide plate and the cam follower (asm.). Follower mounting base Contact 0.2 to 0.3 mm Press Fig. 66 JUKE Fig. 67 - 44 - jintex.in
HOW TO ADJUST 1. Move follower guide plate 2 to adjust so that a 0.2 to 0.3 mm clear- ance is obtained between follower guide plate 2 and cam follower (asm.) 1 when the cam roller shaft comes in contact with the fol- lower stopper plate (Figures 59 and 60 on page 40). Then, fix the follower guide plate by tightening screw 3 . (Caution) 1. Confirm, by pressing cam follower (asm.) 1 in the direction of the arrow, that the cam roller shaft comes in contact with the follower stopper plate. RESULTS OF IMPROPER ADJUSTMENT If the clearance provided between the fol- lower guide plate and the cam follower (asm.) is larger than the specified value: • A play at the moving knife in the rocker direction will be larger. If the clearance provided between the fol- lower guide plate and the cam follower (asm.) is smaller than the specified value: • The follower will fail to come off the thread trimmer to actuate at the start of sewing. In this case, the related components will break or the sewing machine will be locked. - 45 - jintex.in
STANDARD ADJUSTMENT 9) Installing the joint rod (asm.) No clearance Fig. 68 Conditions o The rocker arm (right) should come in contact with the rocker arm stopper screw. In addition, the cam roller shaft should come in contact with the follower stopper plate. - 46 - jintex.in
HOW TO ADJUST RESULTS OF IMPROPER ADJUSTMENT 1. Connect joint rod (asm.) 2 to cam follower (asm.) 1 and fix it there. 2. When cam roller shaft 3 comes in contact with follower stopper plate 4 and rocker arm (right) 5 comes in contact with rocker arm stopper screw 6, fit rocker arm plate 7 over moving knife shaft 9. Then fix the rocker arm plate on rocker arm (right) 5 using screw 8. (Caution) 1. When fixing the rocker arm plate on the rocker arm (right), be sure to fix it while lifting the joint rod (asm.) in the direction of arrow A. If there is a clearance between the follower stopper plate and the cam roller shaft or between the rocker arm stopper screw and the rocker arm (right), the initial position of the moving knife will be improper. In this case, following trouble will be caused. • Bobbin thread clamp failure will occur. • Thread trimming failure will occur. • The sewing machine will be locked. - 47 - jintex.in
STANDARD ADJUSTMENT (2) Wiper components Fig. 69 (3) Position of the reverse stitching magnet Conditions • Stitch length (feed amount): Maximum • A clearance of 0.5 to 1 mm should be provided between the reverse stitching magnet and the plunger radial plate when the reverse feed con- trol lever is pressed down until it will not go further. Press down until it will go no further. Fig. 71 - 48 - jintex.in
HOW TO ADJUST 1. Loosen screw 2. Move wiper 3 in the direction of the arrow so that the length of the wiper is set to 43.8 mm. Then, tighten screw 2. 2. Loosen two screws 1, and adjust so that the top end of the wiper is spaced 20.7 mm from presser bar 4. Then, tighten screws 1. Table 22 Gauge size Part No. Dimension ~3/8" 10209230 16 7/16"~5/8" 10209500 24 3/4"~7/8" 10209807 30 1"~1 1/4" 10209906 37 Fig. 70 1. Set the stitch dial to the max. value on the scale. 2. Loosen two screws 2 in magnet mounting base 1. 3. Press reverse feed control lever 3 down until it will go no further. Then move magnet mounting base 1 up or down to adjust the clear- ance provided between plunger radial plate 5 and the underside of reverse feed magnet 4 to 0.5 to 1 mm. Then, tighten screws 2. RESULTS OF IMPROPER ADJUSTMENT o If the wiper is too long (longer than 43.8 mm), the wiper will interfere with the needle clamp while the sewing machine is in operation. o If the wiper is not correctly positioned (the clearance between the presser bar and the wiper is larger than 20.7 mm), the wiper will interfere with the needle while the sewing machine is in operation. o If the wiper is not correctly positioned (the clearance between the presser bar and the wiper is smaller than 20.7 mm), the wiper will come in contact with the needle while the wiper is in operation. (The needle may breaks.) If the clearance provided between the plunger radial plate and the reverse stitching magnet is larger than the specified value; o The attraction of the magnet will be de- creased. In this case, the machine fails to start reverse feed stitching. If there is no clearance provided between the plunger radial plate and the reverse stitching magnet: o The stitch length for reverse feed stitching will be decreased. - 49 - jintex.in
STANDARD ADJUSTMENT (4) Initial position of the reverse feed control lever 1) For the sewing machine equipped with an automatic reverse feed stitching function Lightly press the reverse feed control lever. Align 0.2 to 1 mm Fig. 72 Press the lever down until it will go no further (Reference valuo 58.4 mm) Align Top surface of the bed Fig. 73 Conditions Stitch length (feed amount) should be maxi- mized. Lightly press the reverse feed control lever and the lever is aligned with the reverse feed link (1), a clearance of 0.2 to 1 mm should be provided between the reverse feed control lever and the back lever stopper. 2) For the sewing machine that is not equipped with an automatic reverse feed stitching function Conditions Stitch length (feed amount): 0 Height of the top surface of the reverse feed control lever should be 58.4±2 mm above the top surface of the bed. Fig. 74 - 50 - jintex.in
HOW TO ADJUST For the sewing machine equipped with an automatic reverse feed stitching function 1. Set the stitch dial at the maximum value on the scale. 2. Lightly press reverse feed control lever 1 down until it meets re- verse feed link (1) 2. At this time, a clearance of 0.2 to 1 mm should be provided between reverse feed control lever 1 and back lever stopper 3. 3. If the aforementioned clearance is smaller than 0.2 mm or larger than 1 mm, set the stitch dial at 0 (zero) on the scale. 4. Press reverse feed control lever 1 down until it will go no further. 5. Loosen the screw in the feed adjusting base and turn reverse feed link (1) 2 to adjust so that a clearance of 14±0.2 mm is provided between back lever stopper 3 and reverse feed control lever 1. After the adjustment, tighten the screw in the feed adjust- ing base. For the sewing machine that is not equipped with an automatic reverse feed stitching function 1. Set the stitch dial at 0 on the scale. 2. Loosen the screw in the feed adjusting base. Turn reverse feed control lever 1 to adjust so that the height of the top surface of re- verse feed control lever 1 to 58±2 mm above the top surface of the bed. After the adjustment, tighten the screw in the feed adjust- ing base. (Caution) When the screw in the feed adjusting base is loosen- ed, do not move the feed adjusting base in the axial direction of reverse feed control lever 1. This will push the feed adjusting base against the reverse feed control lever. In this case, stitching troubles such as reduced stitch length for the reverse feed stitching will occur. RESULTS OF IMPROPER ADJUSTMENT If the clearance provided between the back lever stopper and the reverse feed control lever is 0 (zero): - The kinky reverse feed control lever will occur. - Stitch length will be shortened. If the clearance provided between the back lever stopper and the reverse feed control lever is 1 mm or more: - Stitch length will be reduced when per- forming reverse feed stitching. - 51 - jintex.in
7. SEWING SPECIFICATION CHANGE-OVER PROCEDURE (1) If it is necessary to change the gauge, refer to "2. Gauge component table" and "8. Gauge replacing procedure. (2) Replaceable component table Table 23 Name of part S type A type G type F type Tension spring Part No. B3129012A00 Wire diameter 1.0 mm Part No. D3129555D00 Wire diameter 0.9 mm Part No. B3114232000 Wire diameter 1.2 mm Part No. D3129555D00 Wire diameter 0.9 mm Tension spring No. 1 Part No. 11045101 Part No. 11045101 Part No. 11093606 Part No. 11045101 Stitch dial Part No. 11071909 Stitch length 5 Part No. 11071909 Stitch length 5 Part No. 11071909 Stitch length 5 Part No. 11072006 Stitch length 4 (Caution) 1 Needle (standard) DPX5 #14 MDP500B1400 Without a thread trimmer DPX5 #9 MDP500B0900 DPX5 #21 MDP500B2100 134 SES SERV7 Nm65 MC200520650 (Caution) 2 With a thread trimmer DPX5 #11 MDP500B1100 (Caution) 1. Stitch dial for the F type of sewing specification is different from that for the other types of sewing specifications. The stitch dial is changed in the steps of procedure described below. 1) Align the "0" on the scale of stitch dial with the marker dot engraved on the machine arm. 2) Remove the screw from the stitch dial. At this time, take care not to allow the stitch dial to turn. 3) Align the "0" on the scale of stitch dial to be used with the marker dot engraved on the machine arm. Then, tighten the screw. 4) Set the stitch dial at the max. value on the scale. Check that the max. number (5 or 4) on the scale is aligned with the marker dot engraved on the machine arm. If they are not aligned with each other, loosen the screw in the stitch dial and adjust the max. number on the scale to the marker dot on the machine arm. Then, tighten the screw in the stitch dial. (Caution) 2. When replacing the needle for changing the sewing specification, adjust the needle referring to "(2) Needle-to-hook timing" on page 20. Only for the F type of sewing specification, the needle bar height, needle-to-hook timing and the lift- ing amount of the needle bar from its lowest dead point are different from those for the other types of sewing specifications. So, adjust those items referring to "3) Needle bar height" on page 16 and "(2) Needle-to-hook timing" on page 20. - 52 - jintex.in
8. GAUGE REPLACING PROCEDURE (1) How to remove the gauge 1) Turn OFF the power switch. 2) Remove the slide plate, needle, clamp, presser foot, throat plate and feed dog. * For the sewing machine with a thread trimmer and a wiper, remove the currently-mounted wiper if the size of gauge to be used is not acceptable to the wiper. 3) Tilt the sewing machine. 4) Loosen screws 1 and 2 in the hook driving shaft saddle. * For the sewing machine with a thread trimmer, loosen two screws 3 in connecting link (asm.) 4 and screw 6 in the rocker arm plate 5. Do not remove the aforementioned screws but only loosen them. 5) Loosen two screws 10 in hook driving shaft gear 9. * At this time, do not lever the screw (screw No. 1) which is tightened in the flat section of hook driving shaft 7. Loosen the screw to the extent where the screw No. 1 does not come off the flat section of hook driving shaft 7 when turning hook driving shaft gear 9 by hand. (2) How to install the gauge 1) Raise the sewing machine. 2) Attach the feed dog in position. 3) Attach the needle clamp and needle in position. 4) Adjust the height of the needle bar. 5) Remove the throat plate. 6) Tilt the sewing machine. Refer to "2) Position and height of the feed dog" on page 14. Refer to "4) Needle entry" on page 18. Refer to "3) Needle bar height" on page 16. Fig. 75 Fig. 76 - 53 - jintex.in
7) Move the hook driving shaft saddle from its home position. Adjust so that the specified clearance is provided between the needle and the blade point of the hook. Then, fix the hook driving shaft. 8) Fix the hook driving shaft gear in position. 9) Raise the sewing machine. 10) Attach the throat plate in position. 11) Attach the presser foot in position. 12) Attach the wiper in position. Refer to "(2) Needle-to-hook relation" on page 20. Refer to "(2) Needle-to-hook relation" on page 20. Refer to "(2) Wiper components" on page 48. (Caution) 1. When attaching feed dog 1, confirm that it is equidistantly spaced in the feed dog slot in throat plate 2 with respect to the lateral direction. Also confirm that the needle enters the center of the needle hole in feed dog 1. Needle hole in the feed dog Needle 1 2 Clearance Fig. 77 2. For the LH-3128F type of sewing machine, adjust the height of the needle bar, when the stitch length is set to 0 (zero) and the needle bar rests in the lowest dead point of its stroke, so that the bottom end of the needle clamp is 12.4±0.1 mm above the top surface of the throat plate. For the A, G and S types of the sewing machines, use the marker line engraved on the needle bar for the adjustment of the needle bar height. 3. Adjust the clearance provided between the needle and the blade point of the hook to the specified dimension. Position hook driving shaft gear 9 so that a clearance of approximately 0.5 mm is provid- ed between the screw gear and the hook driving shaft saddle. Then, tighten screw 10. Do not remove hook driving shaft gear guide 8. Needle 0 to 0.05 mm Blade point of the hook Needle guard of the hook 0 to 0.15 mm Fig. 78 0.5 mm Hook driving shaft saddle Fig. 79 4. When attaching the presser foot, confirm that the needle does not come in contact with the hook. - 54 - jintex.in
9. REPLACING THE TIMING BELT Fig. 80 * The below-mentioned replacing procedure has been prepared for the LH-3128 as an example. If you want to replace a timing belt for the other types of 2-needle lockstitch machines, refer to the procedure described below. (1) How to remove the timing belt 1) Tilt the sewing machine, and remove timing belt 32 from the hook driving shaft sprocket. 2) Remove the side plate and face plate. 3) Remove presser bar component 12 through 15. 4) Remove thread take-up component 12 through 15. 5) Remove filler plate 11 from the jaw section and screws 10. 6) Loosen screw 17 in needle bar rocking rear arm 18 and draw out needle bar frame (asm.) 16. 7) Loosen screws 19 in main shaft thrust collar (asm.) 20. Remove the handwheel. Then shift counterweight (joint) 21 out of position. 8) Remove feed regulating spring 24 from the feed adjusting base pin 25. 9) Set stitch dial 31 at 0 (zero) and loosen screw 22 in feed adjusting base 23. 10) Loosen screws 26 in thrust collar 27. Draw out reverse feed control lever 28 and reverse feed control lever shaft 29. 11) Draw out timing belt 32 from the side plate of the machine arm. -55- jintex.in
– 56 – jintex.in (2) How to install the timing belt 1) Put timing belt 32 in position from the side plate of the machine arm. Then pass counterweight (joint) 21 through the tim- ing belt. 2) Tighten screws 19 in main shaft thrust collar 20 taking care to remove a play at counterweight (joint) 21. 3) Attach the handwheel. At this time, align the hole for screw No. 1 with the flat portion on the main shaft by turning the handwheel toward the operator. Confirm, now, that the handwheel is not rubbed against the machine arm. 4) Put timing belt 32 on the main shaft sprocket and hook driving shaft sprocket. At this time, refer to "(6) Timing between the main shaft and the hook driving shaft" on page 26. 5) Put reverse feed control lever 29 and reverse feed control lever shaft 29 in the machine arm. Then pass thrust collar 27 and feed adjusting base 28 over the reverse feed control lever shaft. Tighten screws 30 in thrust collar 27 at a position where there is no play. 6) Adjust the position of feed adjusting base 28 with respect to the direction toward the hook driving shaft so that the center of reverse feed adjusting screw 30 meets the center of the cam surface of feed adjusting base. Tighten screw 22 referring to "(4) Initial position of the reverse feed control lever" on page 50. 7) Fit needle bar frame (asm.) 16 from the face plate and join it with needle bar rocker rear arm 18. 8) Assemble thread take-up components 9 through 15. At this time, confirm that there is no axial play in the thread take-up components. 9) Attach filler plate 11 to the jaw section with screws 10. 10) Assemble presser bar components 1 through 9. 11) Turn the handwheel to bring needle bar frame (asm.) 16 to the lowest position. At this time, the stitch dial should be set at 0 on the scale. 12) Set the needle bar so that specified dimensions described in "(1) Needle bar and feed dog, 1) Initial position of the needle bar" on page 14. In this state, position needle bar rocker rear arm 18 as illustrated in Fig. 81 and tighten screw 17. At this time, confirm that there is no axial play in the needle bar. 33±0.5 mm Side plate attaching plane Fig. 81 13) Re-confirm that needle entry is correct referring to "4) Needle entry" on page 18.
10. TROUBLESHOOTING CHART Phenomenon Cause Item to be inspected Corrective measure Groove on the bobbin case stopper of the throat plate has scratches. Grind the groove on the bobbin case stopper. The needle thread tension is too high. The tension applied to the needle thread. Needle-to-hook timing is not properly adjusted. The clearance provided between the hook and the bobbin case opener. Adjust the clearance provided between the hook and the bobbin case opener to 0.2 mm. The clearance provided between the needle and the blade point of the hook. Adjust the clearance provided between the needle and the blade point of the hook to 0.05 mm. Amount of oil in the hook is insufficient. Amount of oil in the hook. Properly adjust the amount of oil in the hook. Thread breakage Operating range and pressure of the thread take-up spring are improper. Operating range and pressure of the thread take-up spring. Properly adjust the thread take-up spring. Blade point of the hook has scratches. Grind the blade point of the hook. Periphery of the needle hole in the feed dog has scratches. Grind the periphery of the needle hole in the feed plate. The machine head is not properly threaded. How the machine head is threaded. The needle is not properly installed. Orientation of the needle. Replace the needle with a new one. The needle is bent or has a blunt point. Needle Install the presser foot while facing it in the correct direction. The presser foot is not properly installed. The needle thread unwists. If thread is likely to break especially when using a tetron thread: 1) Minimize the needle thread tension and the thread take-up spring pressure as long as stitches are neatly finished. 2) Wind the thread round the needles to reduce the frequency of the trouble. Idling stitches are produced. Use the thread guide equipped with a felt pad. A thread loop is not made with consistency when the blade point of the hook clamps the needle thread. -57- jintex.in
Phenomenon Cause Item to be inspected Corrective measure Loose stitches are produced. Same as the aforementioned causes given in the "Thread breakage." Other causes are described below in addition to them. Bobbin fails to move smoothly. Replace the bobbin with a new one. The clearance provided between the hook and the bobbin case opener is too large. Check the clearance provided between the hook and the bobbin case opener. Adjust the clearance provided between the hook and the bobbin case opener to 0.2 mm. The feed dog is positioned too high. Check the height of the feed dog. Adjust the height of the feed dog to 1 mm. The thread path is poorly finished. Buff it up. The clearance provided between the bobbin case and the throat plate is not properly adjusted. Check the clearance provided between the bobbin case and the throat plate. Adjust the clearance provided between the bobbin case and the throat plate to 0.9 mm. Puckering frequently occurs. The needle thread tension is too high. Needle thread tension. Minimize the needle thread tension as long as stitches are neatly finished. The bobbin thread tension is too high. Bobbin thread tension. Minimize the bobbin thread tension as long as stitches are neatly finished. The tension of thread take-up spring is too high. Tension of the thread take-up spring. Minimize the thread take-up spring tension as long as stitches are neatly finished. Operating range of the thread take-up spring is too large. Operating range of the thread take-up spring. Minimize the operating range of the thread take-up spring as long as stitches are neatly finished. Presser foot pressure is too low. Pressure of the presser foot. Increase the presser foot pressure. Sewing speed is too high. (The number of revolutions of the motor is too large.) Reduce the sewing speed. - 58 - jintex.in
Phenomenon Cause Item to be inspected Corrective measure Stitch skipping frequently occurs. Same as the aforementioned causes of "Needle-to-hook relation" in the "Thread breakage" Presser foot pressure is too low. Blade point of the hook is blunt. The needle guard of the hook fails to work. The needle is too thick for the thread used. A heavy-weight material is used. Pressure of the presser foot. Check the shape of the blade point of the hook. Correct the blade point of the hook or replace the hook with a new one. Adjust the needle guard of the hook so that it works normally. Replace the needle with one that is thinner by one count. If stitch skipping is likely to occur particularly when using a spun thread: Refer to "(2) Needle-to-hook relation." Lowest position of the needle bar When the needle bar ascends by H mm Upper marker line Lower marker line Upper marker line Lowest position of the needle bar When the needle bar ascends by H mm Blade point of the hook Center of the needle 0.8 to 1 mm (H) mm Lowest position Stitch skipping is not likely to occur when H mm is adjusted to 2.4 to 2.6 mm. If H (mm) is excessively increased, loosened stitches will result. So, be careful. - 59 - jintex.in
Phenomenon Cause Item to be inspected Corrective measure Needle thread trimming failure Thread trimming timing is not properly adjusted. Top end of the moving knife has scratches or bent. Properly adjust the thread trimming timing. Replace the moving knife with a new one. The clearance provided between the hook and the bobbin case opener. Adjust the clearance provided between the hook and the bobbin case opener to 0.2 mm. The clearance provided between the needle and the blade point of the hook. Adjust the clearance provided between the needle and the blade point of the hook to 0.05 mm. The clearance provided between the bobbin case and the throat plate. Adjust the clearance provided between the bobbin case and the throat plate to 0.9 mm. Needle-to-hook relation is not properly adjusted. Lift of the needle bar and the needle bar height. Adjust the lifting amount of the needle bar and the height of the needle bar properly. The moving knife is improperly positioned. Adjust the longitudinal position of the moving knife. Operating range of the thread take-up spring is too small. Adjust the operating range of the thread take-up spring using the thread take-up spring stopper. Bobbin thread trimming failure Top end of the moving knife is positioned too low. Position of the moving knife blade. Replace the moving knife with a new one. The hook is positioned too high. Height of the hook. Check the height of the hook. Top end of the moving knife has scratches or bent. Replace the moving knife with a new one. Needle hole in the feed dog (throat plate) is too large. Replace the feed dog (throat plate) with one that has a needle hole of appropriate size. The feed dog is positioned too high. Check the height of the feed dog. Adjust the height of the feed dog to 1 mm. Blade point of the hook has worn out. Replace the hook with a new one. The clearance provided between the needle and the blade point of the hook is not properly adjusted. Blade point Pushes out the bobbin thread (Caution) If the clearance between the needle and the blade point of the hook is adjusted when the needle guard works, the needle may bend. As a result, the moving knife will be improperly positioned and push out the bobbin thread, causing a thread trimming failure. Needle guard Bobbin thread - 60 - jintex.in
Phenomenon Cause Item to be inspected Corrective measure Bobbin case idles at the time of thread trimming. Thread is not wound round the bobbin in the correct direction. Amount of thread wound round the bobbin. Wind the bobbin with thread until 80% of its capacity is reached. The bobbin is wound with thread of which amount exceeds 80% of its capacity. Replace the idling prevention spring with a new one. Pressure of the idling prevention spring is too low. Use an idling prevention sheet with the machine. A bobbin made of iron is used. Type of the bobbin used. Replace the bobbin with a specified aluminum bobbin for the sewing machine with a thread trimmer. Thread path on the hook is poorly finished. Grind the thread path on the hook or replace the hook with a new one. The needle-up stop timing is excessively advanced. Position of the red marker dot engraved on the handwheel and the marker dot engraved on the machine arm when the sewing machine stops with its needle up. Properly adjust the needle-up stop position of the sewing machine. Stitch skipping at the start of sewing. Slip-off of the thread at the start of sewing. Bobbin thread presser spring fails to clamp the bobbin thread after thread trimming. Check whether the thread is clamped under the moving knife after thread trimming. Adjust the position of the moving knife or replace the thread presser with a new one. The feed dog is positioned too high. Check the height of the feed dog. Adjust the height of the feed dog to 1 mm. Pressure of the thread take-up spring is too high or the stroke of the spring is too large. Thread take-up spring. Decrease the pressure of the thread take-up spring or reduce the stroke of the spring. Length of thread remaining at the needle eyelet is insufficient. Adjust the pretensioner to a lower value so that a longer thread remains at the needle eyelet after thread trimming. The needle used is too thick. Use a thinner needle. To be continued to the next page - 61 - jintex.in
Phenomenon Cause Item to be inspected Corrective measure Continued from the previous page Needle hole in the feed dog is too large. Replace the feed dog with one that has a smaller needle hole. (Caution) The feed dog comes in three different types with respect to the size of the needle hole. Use the feed dog with the smallest needle hole as long as the needle does not break. For heavy- weight materials For medium- weight materials For light- weight materials Bobbin thread tension is too high. Decrease the bobbin thread tension. (Caution) When using a thin thread (with a higher count), stitch skipping or slip-off of the needle thread is likely to occur when the remaining amount of bobbin thread is not enough. Bobbin thread tension is too low. Extent of idling of the bobbin Increase the bobbin thread tension. The presser foot rises at the start of sewing. Use the soft-start function. - 62 - jintex.in
Phenomenon Cause Item to be inspected Corrective measure Thread is not smoothly fed from the thread stand. How the thread is wound round the thread stand and fed from it. Adjust so that the needle is smoothly fed from the thread stand. (Caution) 1 Thread tension of the tension controller No. 1 is too high. Reduce the thread tension of the tension controller No. 1. Operating range of the thread take-up spring is too large. Operating range of the thread take-up spring. Decrease the operating range of the thread take-up spring. Hook of the moving knife is not properly ground. Replace the moving knife with a new one. Length of thread remaining at the needle eyelet after thread trimming is insufficient, or the thread slips off the needle eyelet after thread trimming. Tension disk fails to work at the time of thread trimming. Action of the tension releaser. Properly adjust the tension releaser. Thread trimming timing is not properly adjusted. Timing of the thread trimming action. Properly adjust the thread trimming timing. Longitudinal position of the moving knife is not properly adjusted. Adjust the longitudinal position of the moving knife properly. Needle-to-hook relation is not properly adjusted. The clearance provided between the hook and the bobbin case opener is too large. Adjust the clearance provided between the hook and the bobbin case opener to 0.2 mm. The needle and the bobbin case stopper have scratches. The clearance provided between the bobbin case and the throat plate is too small. Adjust the clearance provided between the bobbin case and the throat plate to 0.9 mm. Correct the needle and the bobbin case stopper or replace them with new ones. The moving knife fails to cut the thread sharp. Replace the moving knife with a new one. Thread is cut outside the material. Use the thread guide equipped with a felt pad. The felt pad of the thread guide equipped with a felt pad has a thread passing mark and is flattened. Actuate the thread trimmer with the sewing speed reduced if the thread is cut outside the material. Replace the felt (22603708) with a new one. (Caution) 1. When using a synthetic thread, the thread is likely to be wound round the thread stand. In this case, use the thread stand guide arm (asm.) supplied with the sewing machine. - 63 - jintex.in
Phenomenon The wiper fails to spread the thread. The V belt is not properly tensed. The wiper is improperly positioned. Cause The wiper is improperly positioned. The needle-up stop position of the machine is improper. The V belt is not properly tensed. The wiper is improperly positioned. Item to be inspected Position of the red marker dot engraved on the handwheel and the marker dot engraved on the machine arm when the sewing machine stops with its needle up. Tension of the tension controller No. 1 Length of the needle thread remaining after thread trimming is excessive. Timing of the thread trimming action. The bobbin thread clamping pressure is too high. The moving knife fails to cut the thread sharp. Thread presser spring Position of the moving knife. Corrective measure Adjust so that the wiper spreads the thread properly. Properly adjust the needle-up stop position of the sewing machine. Properly tense the V belt. Adjust so that the wiper spreads the thread properly. Adjust the tension controller No. 1 so that the needle thread of 35 to 45 mm remains after thread trimming. Properly adjust the thread trimming timing. Properly adjust the position of the thread presser. Replace the moving knife with a new one. - 64 - jintex.in
