Sewing machine for professional use Mquina de coser para uso profesional Machine coudre usage professionnel

TL-98Q

INSTRUCTION MANUAL MANUAL DE INSTRUCCIONES MANUEL DINSTRUCTIONS

IMPORTANT:

Read all safety regulations carefully and understand them before using your sewing machine. Retain this instruction manual for future reference.

IMPORTANTE:

Lea cuidadosamente todas las recomendaciones con respecto a la seguridad y comprendalas perfectamente antes de usar su maquina. Guarde este libro de instrucciones para referencias futuras.
Avant de mettre la machine en marche, lire attentivement et assimiler les regles de securite de ce manuel. Conserver le manuel afin de pouvoir le consulter ul terieurement.
IMPORTANT SAFETY INSTRUCTIONS
When using an electrical appliance, basic safety precautions should always be followed, including the following: Read all instructions before using this sewing machine.
DANGER_____To reduce the risk of electric shock:
1. An appliance should never be left unattended when plugged in. 2. Always unplug this appliance from the electric outlet immediately after using and before cleaning. 3. Always unplug before re-lamping. Replace bulb with same type rated 3 Watts 12V.
WARNING_____To reduce the risk of burns, fire, electric shock, or injury to persons:
1. Do not allow this appliance to be used as a toy. Close attention is necessary when this appliance is used by or near children. 2. Use this appliance only for its intended use as described in this manual. Use only attachments recommended by the manufacturer as contained in this manual. 3. Never operate this appliance if it has a damaged cord or plug, if it is not working properly, if it has been dropped or damaged, or dropped into water. Return the appliance to the nearest authorized dealer or service center for examination, repair, electrical or mechanical adjustment. 4. Never operate the appliance with any air openings blocked. Keep ventilation openings of the sewing machine and foot controller free from the accumulation of lint, dust and loose cloth. 5. Keep fingers away from all moving parts. Special care is required around the sewing machine needle. 6. Always use the proper throat plate. The wrong plate can cause the needle to break. 7. Do not use bent needles. 8. Do not pull or push fabric while stitching. It may deflect the needle causing it to break. 9. Switch the sewing machine off ("0") when making any adjustments in the needle area, such as threading needle, changing needle, threading bobbin, or changing presser foot and the like. 10. Always unplug sewing machine from the electrical outlet when removing covers, lubricating, or when making any other user servicing adjustments mentioned in the instruction manual. 11. Never drop or insert any object into any opening. 12. Do not use outdoors. 13. Do not operate where aerosol (spray) products are being used or where oxygen is being administered. 14. To disconnect, turn all controls to the off (0) position, then remove plug from outlet. 15. Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.

SAVE THESE INSTRUCTIONS

This sewing machine is intended for household use only.
Please use following foot control:
Sewing machine model number Used with foot controller number

YC-485

This appliance has a polarized plug (one blade wider than the other). To reduce the risk of electric shock, this plug is intended to fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install the proper outlet. Do not modify the plug in any way.

Manual thread cutter Cuchilla para corte manual de hilo Coupe-fil manuel
Cuchilla para corte manual de hilo
Eleve la aguja y el pie prensatela despus de completar el cosido, extraiga el material, y corte el hilo con la cuchilla para corte manual de hilo.

Coupe-fil manuel

Aprs la couture, relever laiguille et le pied presseur, retirer le tissu et couper le fil avec le coupe-fil manuel.
Automatic thread trimming switch/Thread trimming foot switch
When the sewing is completed, both the needle and the bobbin threads can be simultaneously trimmed. You can re-start sewing even if the bobbin thread does not appear on the throat plate. Use either one of the two switches when trimming thread.
Interruptor del cortahilo automtico/interruptor del pie del cortahilo
Cuando se completa el cosido, se pueden cortar simultneamente los hilos de bobina y de aguja. Usted puede reanudar el cosido an cuando el hilo de bobina no aparezca en la placa de agujas. Para cortar el hilo use cualquiera de los dos interruptores.
Bouton de coupe automatique du fil/Interrupteur au pied de coupe du fil
Aprs la couture, il est possible de couper les fils daiguille et de canette en mme temps. On peut ensuite reprendre la couture mme si le fil de canette napparat pas sur la plaque aiguille. Pour couper les fils, utiliser le bouton ou linterrupteur au pied.
Stitch length adjusting dial
Stitch length for normal stitching is 2 to 2.5 mm. (Adjusting range: 0 to 6 mm)

Mark Marca Repre

Cuadrante de ajuste de longitud de puntada
La longitud de puntada de un cosido normal es de 2 a 2,5 mm. (Gama de ajuste: 0 a 6 mm)
Cadran de rglage de la longueur des points
Pour la couture normale, la longueur des points est de 2 2,5 mm. (Plage de rglage: mm)

Needle up/down switch

Every time the switch is pressed, the needle goes up or comes down. This switch can be used when using needle threader or dropping the needle on the material. If the switch is continuously pressed, a needle will move slowly. Please use when sewing end of fabrics.
Interruptor de aguja arriba/abajo
Cada vez que se pulsa el interruptor, sube o baja la aguja. Este interruptor se puede usar cuando se usa enhebrador de aguja o para bajar la aguja sobre el material. Si se presiona continuamente el interruptor, la aguja se mueve lentamente. Srvase usarlo cuando cosa los extremos de la tela.
Bouton de relevage/abaissement de laiguille
A chaque pression sur cette touche, laiguille remonte ou sabaisse. Cette touche sutilise lors de lutilisation de lenfileur daiguille ou pour abaisser laiguille sur le tissu. Lorsquon appuie continuellement sur cette touche, laiguille se dplace lentement. Lutiliser lorsquon atteint lextrmit du tissu.
Reverse feed stitch lever
The seam does not fray when the reverse feed stitching is performed at the start or the end of sewing.

CAUTION: Turn OFF the power to the sewing machine before replacing the lamp. AVISO: Desconecte la corriente elctrica de la mquina de coser antes de reemplazar la lmpara. AVERTISSEMENT: Avant de remplacer la lampe, mettre la machine hors tension.
Replacing the lamp / Modo de reemplazar la lmpara / Remplacement de la lampe
* Replace the lamp after it is cooled. * Reemplace la lmpara cuando se haya enfriado. * Attendre que la lampe se soit refroidie avant de la remplacer. Turn OFF the power switch. Open the cover of the face plate. Pull out the lamp holder portion. Pull out the lamp. Power consumption of the lamp: 12V 3W Posicione en OFF el interruptor de la corriente elctrica. Abra la cubierta de la placa frontal. Tire hacia afuera la porcin del portalmparas. Saque la lmpara. Consumo de energa de la lmpara: 12V 3W Placer linterrupteur dalimentation sur arrt. Ouvrir le couvercle frontal. Retirer la partie de support de la lampe. Retirer la lampe. Consommation de la lampe: 12V 3W
Pull out without twisting. Extraer sin retorcer. La tirer sans la tourner.
* Please consult JUKI dealers when you purchase the lamp. * Cuando compre una lmpara, consulte a los distribuidores de JUKI. * Pour lachat dune lampe, sadresser un revendeur JUKI.
Introduction of optional parts / Informacin sobre las piezas opcionales / Prsentation des pices en option
Presser foot and throat plate for light-weight materials Prensatelas y placa de agujas para materiales livianos Pied presseur et plaque aiguille pour tissus lgers Throat plate for heavy-weight materials Placa de agujas para materiales pesados Paque aiguille pour tissus lourds
It is applicable to sew the light-weight material such as nylon, georgette, tricot, etc. Se aplica para coser materiales livianos como nyln, georgette, tricot, etc. Les utiliser pour coudre des tissus lgers que nylon, georgette, tricot, etc.
* Please consult the JUKI dealer when you purchase the optional parts. * Cuando usted tenga que comprar las piezas opcionales, le aconsejamos que consulte al distribuidor de JUKI. * Pour lachat de pices en option, sadresser au revendeur JUKI.
Troubles and Corrective Measures
If sewing difficulties occur, make sure the instructions are correctly followed. If a problem still exists, the reminders below help to solve it.

Troubles

Stitches are skipped.
1. The needle is bent or the needle point is blunted. 2. The needle has not been attached to the needle bar properly.

Corrective measures

Replace the needle. Attach the needle properly to the needle bar. Correct the threading. Properly adjust the thread tension. Replace the needle. Replace the needle by the one suited to the thread used. Decrease the tension. Replace the bobbin case. Replace the throat plate. Replace or correctly attach the needle. Correctly position the needle, throat plate, or presser foot. Decrease the pressure of the presser foot. Balance the tension. Properly correct the combination of needle and the thread. Replace the needle by the one suited to the material. Balance the tensions. Carry out maintenance of your sewing machine. Carry out maintenance of your sewing machine. Apply the proper sewing machine oil. Clean up the sewing machine. Lubricate the hook, strongly turn the handwheel clockwise and counterclockwise several times, then remove the thread caught in the hook. Set the stitch length to an appropriate amount. Set the drop-feed knob to FEED. Turn the presser foot pressure regulator to increase the pressure properly. Turn the handwheel or press the needle up/down switch to bring the needle to its highest position. Attach the needle properly. Slightly turn the handwheel by hand to the opposite side (opposite to the direction at the time of sewing).

16-28 -

Needle thread breaks.
1. The machine head has been threaded incorrectly. 2. The needle thread tension is too high or low. 3. The needle is bent or the needle point is blunted. 4. The needle is not suited to the thread used.
The bobbin thread breaks.
1. The bobbin thread tension is too high. 2. The rubbing of the bobbin case spring has produced a slot. 3. Scratches on the needle hole in the throat plate.

The needle breaks.

1. The needle is bent or has been installed improperly. 2. The needle hits the throat plate or the presser foot.

Stitches are puckered.

1. The presser foot applies too much pressure to the material. 2. The tension of the needle thread is not balanced with that of the bobbin thread. 3. When the combination of the needle and the thread is improper. 4. The needle is too thick for the material.
Stitch performance is bad. The rotation noise is too heavy or too high.
1. The tension of the needle thread is not balanced with that of the bobbin thread. 1. Dust accumulates in the feed dog 2. The oil in the machine has run out due to a long period of usage. 3. The oil other than the exclusive sewing machine oil is used. 4. Thread wastes accumulate in the hook.
The handwheel does not rotate smoothly or does not turn. The material cannot be fed.
1. The thread is entangled and caught in the hook.
1. The stitch length is set 0. 2. Drop-feed knob is set to NOT FEED. 3. The pressure of the presser foot is too low.
Needle threading cannot be performed.
1. When the needle has not been raised. 2. When the needle has not been inserted until it can go no further at the time of attaching the needle. 3. When the sewing machine has been turned with the needle threader lever lowered (during threading) by mistake.
Problemas y Medidas Correctivas
Si se presentan dificultades en el cosido, consulte sin falta las instrucciones para cerciorarse de que las ha entendido correctamente. Si se presenta algn problema, le ayudarn a resolverlos leyendo las precauciones que damos a continuacin.

Problem

Slto de puntadas

Causas

1. La aquja est doblada o la aguja est roma. 2. La aquja no est bien colocada en la barra de agujas.

Medida correctivas

Reempace la aguja Coloque debidamente la aguja en la barra de agujas. Corrija el enhebrado. Ajuste debidamente la tensi del hilo Reemplance la aguja. Reemplance la aguja por otra que se acomode al hilo que se est usando. Disminuya la tensi. Reemplace el portabobina. Reemplace el placa de agujas. Reemplace o coloque la aguja correctamente. Posicione correctamente la aguja, laplaca de agujas o el prensatelas. Disminuya la presin del prensatelas. Equilibre las tensiones. Corrija debidamente la combinacin de aguja e hilo. Reemplace la aguja por orra apropiada al material. Equilibre las tensiones.

1-NEEDLE LOCKSTITCH SEWING MACHINE WITH AUTOMATIC THREAD TRIMMER FOR PROFESSIONAL

TL-98P/98Q

SERVICE MANUAL

CONTENTS

[1] SPECIFICATIONS OF TL-98P/98Q... 1 [2] NAMES OF COMPONENTS... 3 [3] DISASSEMBLY AND ASSEMBLY... 3 [4] PRINTED CIRCUIT BOARD DIAGRAM (CONNECTOR LAYOUT). 15 [5] ADJUSTMENTS OF COMPONENTS... 16

WARNING :

To avoid the risk of fire, electric shock, injury to persons or damage to components, especially keep the following :
When disassembling, assembling or adjusting the sewing machine, remove the power plug. When assembling, be careful about the electrical cord being caught with other components, damage to the covered parts of the cord or miswiring. When replacing the part(s), use the genuine part(s).
[1] SPECIFICATIONS OF TL-98P/98Q

(1) Power switch

ONOFF 2-step changeover switch (common to lamp) located at the belt cover section of the right-hand side of main unit.
(2) Drive control components
Drive Control : Built-in motor timing belt method : Foot pedal controller method (2 m cord) 50 to 1,500 rpm Low speed rotation of 50 rpm while needle up/down switch is ON
(3) Table, stand and handle components
Main unit Handle Table/stand : Portable type main unit with soft case (Case is folded in two and packed with main unit.) One-touch type auxiliary table knee lifter is provided as standard. (Packed together) : Pull-up/down from machine main unit type : Separately sold fully-sunken type table and stand can be used.
(4) Arm and bed components
Material Bed form : Aluminum die casting arm and bed separate body type : Flat bed portable type

(5) General mechanism

1. Thread take-up : Slit type link thread take-up for one-touch threading 2. Hook : DB type horizontal full-rotary hook 3. Pressing pressure adjustment : Stepless adjusting screw with pressing pressure indicator method 4. Lighting device : Built in face cover Switch : Slide type Lamp : Halogen lamp 5. Needle thread post : Two posts for small thread spool and large thread spool Thread guide of thread post is of draw-out type and capable of one-touch threading 6. Bobbin thread winder : One-touch action : Starting method by controller Automatic stop when bobbin thread winding completed 7. Needle thread threading : One-touch threading from thread spool to needle tip 8. Presser foot : Commercially-available presser foot for industrial sewing machine (SL2) can be used. (Setscrew type) 9. Lift of presser foot : By lever : 7 mm Max. by lever : 10 mm By knee lifter : 12 mm 10. Thread tension : Disk pressure adjusting type with simplified disk pressure scale 11. Drop feed : 2-step changeover by knob method (Feed dog : UP : DOWN) 12. Power switch : ON OFF 2-step

(6) Feed mechanism

1. Feed amount adjustment 2. Reverse feed stitch : Dial method. Stepless 0 to 6 mm : Lever method. Feed amount conforms to that of normal feed stitch.

(7) Special mechanism

: Thread trimming switch is used in common for pushbutton type and for external foot pedal switch type. Switch fails to work even when pressing it within two seconds after the rotation of thread trimmer. 2. Needle bar stop position : Electric brake stop method Stop by controller : Down stop Stop by automatic thread trimming : UP stop Stop by bobbin winder : UP stop 3. Automatic needle hole threading : Hook section rotates and automatically returns by lowering threading lever. 4. Needle up/down switch : Switch is of pushbutton type and up/down stop can be performed by half rotation of main shaft when operating switch for a short period of time. When switch is continuously held ON, sewing machine continuously runs at a speed of 50 rpm until switch is turned OFF. 5. Prevention of reverse setting of needle : Needle is attachable to normal direction only. 6. Motor protection Overcurrent : When motor is locked for 0.5 to 1 second due to sudden overload, motor power is automatically turned OFF and returns to the ON state immediately. Overheat : When motor temperature has abnormally risen, motor power is turned OFF(thermal cut) and returns to the ON state when temperature has fallen. 1. Automatic thread trimming
(8) Dimensions and weight
Main unit Weight : 452W x 219L x 350H (mm) : 11.5kg

(9) Power consumption

Whole sewing machine Lamp : 120V 1.4A 60Hz 220 to 230V 95W 50Hz : 12V 3W (Halogen lamp)

[2] Names of Components

Thread guide rod Arm cover asm. Bobbin winder shaft Belt cover Handwheel Stitch dial Needle up/down switch Automatic thread trimming switch Reverse feed stitch lever Drop-feed knob (Hole for auxiliary table support plate)
Thread guide base Presser spring regulator Thread guide No.1 Indicating needle of presser spring regulator Face cover Pressure indicating plate Thread take-up thread guide Lamp switch Thread take-up spring Presser bar connection thread guide Lamp bulb Hand lifter lever Needle bar thread guide Needle bar thread bracket (Hole for auxiliary table support plate)

Bed cover

Side cover
Throat plate asm. Thread take-up spring adjusting plate Standard presser foot asm. Needle threader lever
Bed cover rubber seat Hole for knee lifter lever setting

[3] Disassembly/assembly

Page Outer Components 1. Arm cover asm.. 4 2. Belt cover and motor cover.. 4 3. Face plate asm.. 4 4. Bed cover mas. asm.. 5 5. MAIN circuit board asm.. 5 Function components 1. Motor asm. and transformer asm.. 5 2. Handwheel and clutch.. 6 3. Thread tensioner asm.. 6 4. Presser bar.. 7 5. Needle bar... 7 6. Thread take-up.. 8 7. Reverse feed stitch lever. 8 8. Idler... 8 9. Stitch dial.. 9 10. Automatic thread trimming switch case. 9 11. 12. 13. 14. 15. Page Wire holder.. 9 Knee lifter lever.. 10 Hook driving shaft pulley.. 11 Hand lifter lever.. 12 Drop-feed knob.. 12
Automatic thread trimming components 1. Looper mas. asm.. 13 2. Moving knife arm installing plate mas. asm. 13 3. Moving knife base mas. asm.. 14 4. Thread trimming solenoid mas. asm.. 14

Outer Components

1. Arm cover asm.
1 Arm cover setscrew SM5042005SN
6 Convex of presser spring regulator knob
5 Slit of presser regulating screw

3 Arm cover

2 Bobbin 4 MAIN circuit winder board case cover connector
Disassembly Remove two 1 setscrews. Disconnect and remove 2 connector.
Assembly Insert 2 connector. Align 6 convex with 5 slit and tighten the setscrew.
Point There should be no torsion or distorsion in presser spring regulator. Align precisely slit portion with convex portion. Do not press each lead wire.
2. Belt cover and motor cover
1 Belt cover setscrew SM5041255SN
2 Motor cover setscrew SM5041255SN
Disassembly Remove four 1 setscrews and remove belt cover. Remove three 2 setscrews and remove motor cover.
Assembly Attach belt cover and tighten 1 setscrews. Attach motor cover and tighten 2 setscrews.
Point There should be no difference in level between belt cover and front face of frame. Make motor cover come closely contact with belt cover.

3. Face plate asm.

Preparation Remove arm cover.
1 Lamp connector 5 Face cover 4 Indicating needle of presser spring regulator
3 Face plate asm. 2 Face plate asm. setscrew SL5040631SE
6 Hand lifter lever spring
Disassembly Disconnect 1 connector and 6 remove. Remove 2 setscrews and remove 3 face plate asm. (together with face cover).
Assembly Attach 3 face plate asm., tighten it with face plate asm. 2 setscrews, and attach 6 hand lifter lever spring. Insert 1 connector.

Point There should be no difference in level around the cover when face cover is closed. 5 should not come in contact with 4 indicating needle.

4. Bed cover mas. asm.

1 Bed cover setscrew 1 Bed cover setscrew SM5051255SN
Disassembly Remove six 1 setscrews and remove bed cover.
Assembly Attach bed cover and tighten setscrews.
5. MAIN circuit board asm.
Preparation Remove arm cover asm. Remove MAIN circuit board case cover and lamp connector. Note) 3 Setscrew to set the circuit board and cover to circuit board case Do not insert in the reverse direction. (See page 15.) Do not loosen this screw. Disassembly Remove 7 connectors of each lead wire. Cut 6 clip bands (3 places). Remove 2 setscrews and 4 setscrew, and remove circuit board.
3 MAIN circuit board setscrew 2 MAIN circuit board case setscrew A SL5030831SF
6 clip band (3 places) Porality exists. 4 MAIN circuit board case Never loosen this screw. setscrew B SM5031401SE
Assembly Press play of circuit board to attach circuit board to the front side and tighten two setscrews. Insert each lead wire into connectors.

3 Motor setscrew nut

Point Read the note and understand it. Ther are color indications on the circuit board for inserting connectors.

Function Components

1. Motor asm. and transformer asm.
Preparation Remove arm cover asm. 5-1 Remove belt cover and 5 Cord guide plate setscrew motor cover respectively. SM5030655SN Make a memorandum of 4 cord wiring. Disassembly Remove cord guide plate 5 setscrews and 5-1 in previous item, and cut 6 clip band. Loosen 4 cord presser. Remove two 1 setscrews and remove motor asm. Remove two 2 setscrews and remove transformer asm. Make sure of wiring route.
1 Motor asm. setscrew SM5050855SN 2 Power transformer setscrew SM5040855SN
Assembly Attach transformer and tighten 3 setscrews. Attach motor asm. and tighten 1 setscrews. Fix it with 4 cord presser. Attach cord guide plate asm. and tighten 5 and 5-1 setscrew. Connect cord guide plate and cord.
Point Loosen 3 nuts to adjust motor tension. Belt tension : the belt should sag 3 to 4 mm when center of belt is applied with 1.96N load.

2. Handwheel and clutch

Preparation Remove belt cover. Remove arm cover.
!0 Groove of handwheel 7 Convex of handwheel bushing
9 Motor pulley 1 Handwheel setscrew 2 Handwheel 6 Groove of handwheel bushing 5 Hook portion of clutch spring 4 Angle portion of clutch spring 3 Groove of clutch spring support 8 Handwheel bushing stopper pin
When removing motor pulley, remove cord guide plate setscrews 5 and 5-1 in previous item.
Disassembly Remove 1 setscrew. Remove cord guide plate setscrew and remove cord guide plate asm. Remove 3 spring support. Move 4 in the direction where clutch spring is released and remove clutch spring. Face 6 to motor side and 8 is hard to drop. Draw out 8 and remove 9.
Assembly Attach 9 and enter 8. Enter 6 groove of bushing to 8 stopper pin and attach bushing. Enter 5 hook portion of spring to slit in the center of handwheel bushing Enter 5 clutch spring to 3 groove of spring support and attach cord guide plate asm. Then tighten setscrew.
Point Align 7 convex of bushing with !0 groove of handwheel and attach handwheel. Then tighten setscrew. Clearance provided between convex of 3 clutch spring support and clutch plate is 2 0.5 mm. See item 12 on page 19 for adjustment.

3. Thread tensioner asm.

3 Thread take-up spring 4 Thread tensioner asm.
5 Thread tension disk presser 2 Thread tensioner setscrew SM8040602TP
1 Thread take-up spring adjusting plate setscrew SL5030801SN
6 Thread take-up spring adjusting plate
Disassembly Remove 1 setscrew. Lower presser foot and remove 2 setscrew. Remove 3 spring together with 4 thread tensioner asm. and adjusting plate.
Assembly Attach 6 adjusting plate and 3 spring to thread tensioner asm. and attach it to frame. Then fix it with 2 setscrew. Tighten 1 adjusting plate setscrew.
Point Place upward the scale of 5 thread tension disk presser. See items 9 and 10 on page 19 for adjustment of pressure and thread take-up spring of stroke.

4. Presser bar

Preparation Remove arm cover asm. 4 Presser spring Remove face plate mas. asm. Remove presser foot and setscrew.
1 Presser bar connection setscrew SM8060502TP 5 Presser bar connection asm. 6 Presser bar lifting lever 8 Hand lifter lever 3 Presser bar
2 Presser spring regulator Threader support plate setscrew (upper) SL5040631SE 7 Indicating needle of presser spring regulator Threader support plate mas. asm.

Threader support plate setscrew (lower) SM4040655SN
Disassembly Assembly Lower 8 lever and loosen 1 Attach regulator 2 screw. setscrew. Set 6 lever to frame, and then Drawing 3 upward, remove 4 set 5 connection. spring. Attach 4 spring when setting Remove 5 connection and 6 lever. 3 presser bar from upper side. Remove regulator 2 screw. Do not remove 7 indicating needle. 3 is hard to remove since secrew mark is attached.
Point Set 4 spring under 7 indicating needle. Lower 8 lever and temporarily tighten it at the position where top end of 3 protrudes approximately 4 mm from frame. For the adjustment, see item 3 on page 17. Needle should not interfere with presser foot.

5. Needle bar

Preparation Needle bar crank Remove arm cover asm. left screw Remove face plate mas. asm. Remove presser bar. Remove needle bar threading guide as well.
1 Needle bar upper bushing felt
2 Needle bar connection setscrew SM8060510SP
6 Needle bar threader guide setscrew 3 Needle bar thread bracket setscrew A1420-001-Needle clamp

5 Needle bar

Disassembly Remove 3 and 4. Remove 1 felt. (Push up needle bar upper bushing 1 felt with 5 and draw it out.) Loosen setscrew of 2 and 6. (Pushing needle bar 5 upward is acceptable.) Draw out 5 upward. Remove left 6 screw and remove crank rod.
Assembly Attach crank rod and tighten it with 6. Perform positioning of needle bar and tighten needle bar connection 2 setscrew. Set needle bar and attach 4 and 3. Insert 1 into hole. Temporarily tighten 6 , and perform adjustment of vertical height after attaching threader support plate asm.
Point Position of needle bar is the place where upper engraved line of needle bar is aligned with lower end face of needle bar bushing at the needle lower dead point. See item 2 on page 17 for the adjustment. See item 15 on page 22 for height adjustment of threader hook of threader support plate mas. asm.

6. Thread take-up

Preparation Remove arm cover asm. Remove face plate mas. asm. Remove presser bar. Remove needle bar.
1 Thread take-up supporting shaft setscrew SM8050602TP 6 Thread take-up support 3 Thread take-up supporting shaft 4 Needle bar crank

5 Thread take-up

2 Needle bar crank setscrew
Disassembly Loosen 1 setscrew. Loosen two 2 setscrews. Draw out thread 3 take-up supporting shaft. Remove 5 and 6 together with 4 needle bar crank.
Assembly Set needle bar crank to thread take-up, attach it onto main unit and tighten setscrews (2 pcs.). Set 6 to 5, enter thread take-up supporting shaft 3 to 6, attach it onto frame and tighten 1 setscrew.
Point Tighten setting portion (flat portion) of needle bar crank with screw No. 1. Press 3 shaft to frame side while viewing the torque and tighten 1 setscrew.

Point Pass the wire through full reverse side of stitch dial. Contact 4 and 5 with each other. For 2, tube has to come out by 13 mm from tube presser. Tube presser and tube regarding 2 should be on the same face. See item 5 on page 27 for 1.

12.Knee lifter lever

Preparation Remove outer components. (Excluding belt cover and motor cover) Raise presser foot.
1 Knee lifter lever shaft spring setscrew SM5030455SF
!0 Knee lifter lever shaft
6 Knee lifter lever 4 Knee lifter link snap pin
3 Claw lever actuating plate setscrew SM8040602TP 8 Knee lifter link asm 2 Knee lifter lever shaft (claw lever plate)
5 Knee lifter lever shaft stop plate setscrew SM5040855SN
9 Claw lever actuating plate
7 Claw lever shaft setscrew SM5041255SN
Disassembly Remove snap 4 pin. Remove 5 setscrews and remove 6. Remove 1 setscrew and take out lever spring. Lower 2 and turn it to the position where 3 can be removed. Remove 3, remove claw lever actuating plate, and draw out 2. Remove claw lever shaft 7 setscrew. Remove 8 link asm.
Assembly Attach 8 to frame and tighten 7 setscrews. Set 2 lever shaft, attach 9 claw lever actuating plate and tighten it with 3. Attach lever spring and tighten with 1. Raise frame, attach 6 knee lifter lever to knee lifter lever !0 shaft, and tighten it with 5. Enter 4 snap pin.
Point There should not be a play in the axial direction of 2 knee lifter lever shaft.
13. Hook driving shaft pulley
Preparation Remove outer components. (Excluding stop solenoid) Loosen idler. Remove needle.
5 Hook driving shaft pulley eccentric shaft 3 Hook driving shaft pulley E-ring (E-6) 1 Timing belt 6 Hook driving shaft pulley eccentric shaft bushing Slit on 4 hook driving shaft pulley eccentric shaft
9 Thread trimmer cam screw No. 1
!0 Moving knife roller arm
2 Hook driving shaft pulley eccentric shaft setscrew SM8040602TP Hexagon 2.0 mm !1 Thread trimmer cam
(Illustration of hook driving shaft pulley)
Make 7 hook driving shaft pulley come out downward.

E-ring groove

Disassembly Remove timing belt from main shaft pulley. Remove 1 belt and loosen two 2 setscrews. Remove 3 E-ring and turn 4 to find a place where backlash in hook driving shaft pulley is large. Press 5 and push out 6 bushing to the right side. Draw out 5 and 6, and remove 7 following the point of 7. Do not make a flaw on 8 E-ring groove when removing 3 E-ring.

Assembly Enter hook driving shaft 7 pulley. Enter eccentric 5 shaft and 6. Set 3 E-ring. Remove the play in hook driving shaft with 6 and tighten 2 setscrew B. Turn 4 shaft slit to adjust backlash in pulley and tighten 2 setscrew A. Set 1 belt. Adjust backlash in eccentric shaft by right rotation.
Point When setting 6 bushing, do not make a flaw on the end face of bushing. When setting belt onto main shaft, refer to thread trimming timing. (Simple method) Lower needle bar 1.95 mm from its upper dead point. Turn hook driving shaft and orient 9 screw No. 1 to this side (just front). Enter contact of !0 roller arm to groove of !1 cam. Turn hook driving shaft in the reverse direction and set belt at the position where it stops.

14. Hand lifter lever

1 Hand lifter lever
2 Hand lifter lever shaft

3 M4 screw

Disassembly Enter 3 to 4 screw threads of M4 screw (arm cover setscrew) in the hole of hand lifter lever shaft on frame. Hold screw head and draw out the screw. At the same time, 2 hand lifter lever shaft is drawn out. Remove 1 hand lifter lever.
Assembly Enter 2 hand lifter lever shaft into the hole on frame. Tap head of lever shaft to fit the shaft by force and set the shaft to hole in hand lifter lever.
Point End face of lever shaft that is fit by force should not be convex from frame face.

15. Drop-feed knob

1 Drop-feed knob
3 E-ring 5 Wire installing plate asm.
2 DF adjusting arm spring 6 DF adjusting arm asm.
4 Drop feed knob shaft setscrew
Disassembly Set 1 drop-feed knob to "NOT FEED", remove 4 drop feed knob shaft setscrew, and remove 3 Ering of drop feed knob. Remove 2 DF adjusting arm spring while removing 6 DF adjusting arm asm.
Assembly Pass 1 drop feed knob through 5 wire installing plate. Assemble 2 DF adjusting arm spring while assembling 6 DF adjusting arm asm. Place 3 E-ring to 1 drop feed knob. Assemble drop feed knob shaft with 4 setscrew.
Point It is easy to remove 2 spring when 1 drop-feed knob is set to NOT FEED side.
Automatic Thread Trimming Components

1. Looper mas. asm.

Preparation Remove bed cover.
5 Looper mas. asm. setscrew SM5040855SN

3 Looper link asm.

6 Looper 2 Looper link holding shaft 4 M o v i n g k n i f e 1 Looper link B 7 Bobbin case (Washer A1731090000 arm spring E-ring E-3 (Center of inner hook) E-ring E-3)
Disassembly Remove 1 E-ring. Remove E-ring and washer of 2. Remove looper link asm of 3. Remove moving knife arm spring of 4. Remove setscrews of 5 and remove looper mas. asm.

Assembly Attach looper mas. asm. and tighten 5 setscrews. (Adjust looper link B shaft to hole.) Hook moving knife arm 4 spring. Set looper link and attach E-ring, washer, etc.
Point Place 6 looper in the center 7 of inner hook and securely tighten 5. See item 4-2 on page 27 for adjustment of looper moving amount.
2. Moving knife arm installing plate mas. asm.
Preparation Remove bed cover. Remove 2 looper mas. asm.
2 Looper mas.asm 3 Nut (9 mm) of wire 4 Moving knife arm installing plate mas. asm. set screw SM4050855SP setscrew
Remove moving knife arm 6 spring.
8 Thread trimmer clutch plate collar 7 Thread trimmer clutch plate 1 Moving knife link shaft A 5 Moving knife link collar setscrew E-ring E-Moving knife arm spring
Disassembly Remove 1 E-ring. Do not remove 5 moving knife link. (Remove together with moving knife arm installing plate.) Remove 3 nut on the left side only. Remove thread trimmer clutch plate 7 collar setscrew and 8 thread trimmer clutch plate collar. Remove two 4 screws and remove installing plate mas. asm. At this time, simultaneously remove moving knife link. ( To prevent moving knife link from warping)
Assembly Attach moving knife arm installing plate mas. asm. Note : See the point on the right side. Temporarily tighten 4 setscrews. Attach 1 E-ring of link shaft. Temporarily tighten 2 looper mas. asm. Attach 6 moving knife arm spring. Determine position of moving knife and securely tighten 4. Note : Refer to assembling of moving knife and looper mas. asm.
Point Set 1 moving knife link and wire 3 setscrew. Position of moving knife Remove hook and see from the reverse side of bed. (See item 1 on page 23.) See item 5 on page 27 for adjustment of 3 nut of wire.
3. Moving knife base mas. asm.
Preparation Remove bed cover. Remove throat plate asm.

3 Feed dog

2 Moving knife base mas. asm. setscrew SM4040855SP
1 Moving knife link shaft A E-ring
Disassembly Remove 1 E-ring and raise frame. Remove two 2 setscrews. Bring 3 feed dog to its highest position. Raising moving knfe base by hand, lightly press moving knife link A from upper side. (Release coupling.)
Assembly Attach moving knife base to frame while setting moving knife base to moving knife link shaft A. Temporarily tighten 2 setscrews. Push moving knife base in the direction of right rear 45 and securely tighten it. Tilt frame, set moving knife link shaft A and enter 1 E-ring.

General Mechanism

1. Height of needle bar bushing
Set dimension from top surface of throat plate to lower end face of needle bar bushing to 67.0 0.1mm. (bushing : driving fit)
Lower end face of needle bar bushing 67.0 0.1 mm Top surface of throat plate

2. Height of needle bar

Lower dead point of needle bar. Attach length gauge (needle) of #14 needle to needle bar, and adjust dimension from tip of needle to installing plane of throat plate on frame to 17.8 0.1 mm. Perform adjustment with needle bar connection setscrew. Position of standard Upper engraved line A on needle bar aligns with bottom end of 3 needle bar bushing when needle bar is at lower dead point.
Needle bar connection setscrew

A 2 17.8 0.1 mm

Installing plane of throat plate on frame
3. Height of presser foot
Adjust the height in the state that hand lifter lever is raised. Clearance provided between top surface of throat plate and lower face of presser foot is 7.00.5 mm. Perform adjustment with presser bar connection setscrew.

Presser foot

Throat plate

7.00.5 mm

4. Height of feed dog
Set stitch dial to 2 and bring feed dog to its highest position. See the height on the rear side of feed dog. Bottom of tooth of feed dog should be aligned with top surface of throat plate. (Figure on the right side : protruding amount from top surface of throat plate is 1.20.1 mm.) Perform adjustment with 1 vertical feed shaft arm.
Top surface of throat plate 1.20.1 mm

2 Shaft arm setscrew

1 Vertical feed shaft arm

5. Feed timing

Set stitch dial to P=2. Lower feed dog in the normal feed operation and align it with top surface of throat plate. At this time, clearance provided between needle top and top surface of throat plate is 00.2 mm. Perform adjustment with feed cam setscrew. Feed cam setscrew
Needle (HA x 1 #14) Top surface of throat plate

00.2 mm

6. Needle-to-hook timing
Loosen three setscrews in hook. Adjust blade point of hook and left edge of needle to 0 to 0.2 mm when needle bar lifts by 2.28 mm from its lower dead point. Check clearance between needle and hook, and tighten setscrews. Remove bobbin case positioning finger to improve the work. Standard of position of 2 mm from lower dead point of needle bar is that of engraved lines 1 to 2 on needle bar. (1 Lower dead point, 2 Position of lifting 2 mm)

1.33 mm

0 to 0.2

Lifting amount 2.28 mm

1 Hook
7. Clearance between needle and hook
Loosen three setscrews in hook. Adjust blade point of hook to position of 0.2 mm from left edge of needle. Adjust clearance between blade point of hook and needle to 0.02 to 0.07 mm. Temporarily tighten setscrews, check timing, and securely tighten setscrews.

Needle Blade point

0.02 to 0.07 mm
8. Position of bobbin case positioning finger
Loosen bobbin case positioning finger 1 setscrew. Make right-hand edge of convex portion of bobbin case positioning finger spring align with 2 righthand edge of needle. Temporarily tighten setscrew, hold clearance of 0.3 to 0.5 mm between inner hook and bobbin case positioning finger, and securely tighten setscrew. Bobbin case positioning finger should not come in contact with hook. Bobbin case positioning finger should not interfere with hook.

Needle

Top view

0.3 to 0.5 mm 3

Bobbin case positioning finger

Front view

Needle 2
1 Bobbin case positioning finger spring
9. Momentum of thread take-up spring (absorbing amount of thread)
Thread take-up spring has to be installed at position of 100.5 mm from thread guide as shown in the figure below. Perform adjustment with 1 thread take-up spring adjusting plate.

10.50.5 mm

Thread tensioner thread guide
Thread take-up spring adjusting plate.
1 Thread take-up spring adjusting plate and setscrew
10. Tension of thread take-up spring
Pass needle thread up to 1 thread tensioner thread guide. Lower presser foot and draw needle thread. Adjust tension of thread take-up spring to 0.176 to 0.245N when thread take-up spring starts lowering. For adjustment, loosen thread tensioner setscrew and turn 3 thread tensioner. Turning clockwise = increasing tension of 4 thread take-up spring.

4 Thread take-up spring

Needle thread
2 Thread tensioner setscrew

3 Thread tensioner asm.

1 Thread tensioner thread guide
11. Adjustment of bobbin thread tension
How to adjust Adjust with adjusting screw so that bobbin thread tension when spun thread #60 is used becomes 0.1760.02N.
Bobbin case Adjusting screw

Bobbin thread

12. Position of bobbin winder clutch
Remove belt cover. How to adjust 1. Bobbin winder OFF state Turn 3 thread trimmer clutch plate link collar and adjust so that a clearance of 20.5 mm is provided between 1 bobbin winder clutch plate and 2 clutch plate spring support, and temporarily tighten 4 setscrew. 2. Bobbin winder ON state Make sure that bobbin winder clutch plate comes in contact with inner ring of clutch plate spring support and securely tighten thread trimmer clutch plate link collar setscrew.

Bobbin winder OFF 4 Link collar setscrew Bobbin winder shaft base adjusting plate 3 Thread trimmer clutch plate link collar

Bobbin winder ON

1 Bobbin winder clutch plate 20.5 mm
2 Clutch plate spring support
To come in contact with each other
13. Adjustment of bobbin winder
[Position of disengaging bobbin winder] How to adjust 1. Set 1 bobbin presser to the position where it is 16 mm away from 2 bobbin winding shaft. 2. Tighten 4 bobbin winder controller asm. with setscrew when concave portion of 3 bobbin winding shaft base adjusting plate is engaged with convex portion of 4 bobbin winder controller asm.
4 Bobbin winder controller asm.

2 Bobbin winding shaft

Setscrew
16 mm To engage with each other To strike 3 Bobbin winding shaft base adjusting plate 1 Bobbin presser
[Position of leaf switch] How to adjust 1. Adjust so that a clearance of 0.9 mm or more should be provided between 1 leaf switch and 2 bobbin winding shaft base adjusting plate when bobbin winding shaft is ON and so that leaf switch is securely turned ON when bobbin winding shaft is OFF. Then tighten leaf 3 switch setscrew.
Bobbin winding shaft ON (leaf SW OFF) 0.9 mm or more Bobbin winding shaft OFF (leaf SW ON)
1 Leaf SW 3 Leaf SW setscrew
2 Bobbin winding shaft base adjusting plate [Adjustment of amount of bobbin thread wound round bobbin]
How to adjust 1. Tighten 1 bobbin winder switch contactor plate with setscrew at the position where 2 bobbin winder switch is turned OFF when amount of bobbin thread wound round bobbin becomes 18 mm in diameter.
3 Bobbin winder SW contactor setscrew 2 Bobbin winder SW
1 Bobbin winder SW contactor plate
14. Position of threader support plate mas. asm.
How to adjust Open face cover and remove arm cover asm. 1. Temporarily tighten 1 threader support plate mas. asm. with setscrews. 2. Adjust 1 threader support plate mas. asm. so that position of threader shaft is 10.5 mm, making needle bar as reference. Then securely tighten setscrews 2 and 3.
Needle bar Threader shaft
2 Threader support plate setscrew (upper)
10.5 mm 1 Threader support plate mas. asm. (15.675 mm) 3 Threader support plate setscrew (lower)
15. Vertical position of threader hook
How to adjust Open face cover. (Perform confirmation with HAX1 #14 needle.) 1. Turn handwheel by hand to bring needle bar near to highest point. Then stop needle bar at position where 1 needle bar 1 Needle bar guide setscrew can be seen from adjustment hole of 2 guide setscrew threader support plate. 2. Press down 3 threader lever to lowest point and check that clearance between top end of 4 threader hook and top end of 2 Threader needle eyelet is 0 to 0.1 mm when 4 threader hook is turned. support plate 3. Insert hexagonal wrench key (1.5 mm) from adjustment hole of 2 threader support plate and slightly loosen 1 needle bar guide setscrew. When hook is lower -> move needle bar guide upward and temporarily tighten it. 4 Threader hook When hook is higher -> move needle bar guide downward and temporarily tighten it. Perform adjustment while confirming position in terms of needle eyelet. When hook is out of place in lateral direction, perform correction of bend of hook with tip of a thin screwdriver or the like, or replace 4 threader hook with a new one. 0 mm 4. When hook is adjusted to aforementioned position, securely tighten setscrews. Caution : Hook has to smoothly pass needles HAX1 and HLX5 #11 to #16.

3 Threader lever

Automatic Thread Trimmer Mechanism
1. Positioning of moving knife arm installing plate (Adjustment of position of moving knife)
Loosen 1 nut of setscrew Loosen 2 setscrews in installing plate and move installing plate to the right or left to obtain position A. Tighten 2 setscrews in installing plate.
2 Moving knife arm installing plate setscrew 1 Nut of setscrew
Reference (substitution) Position of moving knife (see from under side of bed.) Overlapping amount of slot 4 of moving knife base with portion R of moving knife is 0 to 0.5 mm. (To such an extent that portion R of moving knife is slightly seen from slot 4)
Figure observed from the rear after removing hook.
Counter knife Moving knife base

Moving knife base

Align top end of moving knife with border of black coloring section and polished plane of counter knife..A
2. Installing position of thread trimmer SOL (solenoid)
Move 3 thread trimmer solenoid asm. to the right and left to adjust so that clearance between 1 thread trimmer auxiliary link and 2 thread trimmer auxiliary cam is 0.5 to 1.0 mm, and tighten it with 4 setscrews.
When thread trimmer solenoid asm. is set to ON, it has to interlock thread trimmer auxiliary cam.
0.5 to 1.Thread trimmer auxiliary link
3 Thread trimmer solenoid
4 Thread trimmer solenoid setscrew
2 Thread trimmer auxiliary cam 23
3. Thread trimmer cam timing (Needle-to-cam position)
Loosen setscrews in 1 thread trimmer auxiliary cam, 2 thread trimmer cam and 3 roller holding cam. Lower needle bar by 37 (1.95 mm) from its upper dead point. In this state, fix hook driving shaft and perform positioning of cams of 1, 2 and 3.
4 Thread trimmer auxiliary link 1 Thread trimmer auxiliary cam
3-1 Positioning of [thread trimmer auxiliary cam]
Make shaft at top end of 4 thread trimmer auxiliary link of solenoid asm. come in contact with 1 thread trimmer auxiliary cam and tighten it with setscrew.
3-2 Positioning of [thread trimmer cam]
Face front 5 setscrew No. 1 in thread trimmer cam. Enter 6 thread trimmer cam contactor shaft to groove in 2 thread trimmer cam. Slightly pressing thread trimmer cam to handwheel side, turn it in reverse direction. Tighten thread trimmer cam with setscrews at place where idling term of cam groove (place where rotation is hindered) is finished.
2 Thread trimmer cam 5 Setscrew No. 1
6 Thread trimmer cam contactor shaft

Setscrew No. 2

3-3 Positioning of [roller holding cam]
Turn pin of link support plate and make it come in contact with concave portion of 3 roller holding cam. For lateral position, make 3 roller holding cam come in contact with 1 thread trimmer auxiliary cam and tighten it with setscrew.

4 Link arm support plate Setscrew
1 Moving knife roller arm
3 Link arm fixing plate Link arm support plate pin
Adjustment of position of 5 nut of wire setscrew (Refer to item 5 of adjustment of thread tension disk open/close, p.27.) After adjustment of position of looper, tighten looper link setscrew. (Refer to item 4, p.27.)
4. Position and protruding amount of looper (Left/right position and moving amount)
4-1. Adjustment of left/right position of looper
Adjust with looper mas. asm. 2 so that center of inner hook is aligned with center of lopper 1.
2 Looper mas. asm. 1 Looper and inner hook
3 Looper (Convex that looper cam pushes out)

10.2 mm

4 Looper cam (Position where it comes in contact with looper)
4-2. Adjustment of moving amount of looper
When thread trimmer solenoid is ON, top end of looper comes in contact with bobbin case. Adjust clearance between convex 3 of looper and 4 looper cam to 10.2 mm. Loosen looper link 5 setscrew to adjust clearance.

5 Looper link setscrew

4-3. Installing position of looper stopper plate
Adjust installing position of stopper so that clearance between looper and looper installing base is 0.5 to 1.0 mm, and tighten stoper plate with setscrew.

Looper

0.5 to 1.0 mm

Rubber stopper

5. Position of nut of wire setscrew (Adjustment of thread tension disk open/close)

Looper installing bace

Lower presser foot. Move thread trimmer solenoid link A with thread trimmer auxiliary cam, Thread tension disk has to open at the time when roller rides on thread trimmer auxiliary cam. (Disk rise of 0.5 to 0.7 mm at scale 3.5) Perform adjustment with 2 nut on left-hand side after loosening 3 nut on right-hand side. Perform fixing with nut located outside. Nut of setscrew (Wrench 9 mm)

1 Thread tension disk

HOUSEHOLD SEWING MACHINE DIVISION
8-2-1. KOKURYO-CHO, CHOFU-SHI, TOKYO 182-8655, JAPAN PHONE : (81)3-3480-5054 FAX : (81)3-3480-5037 Copyright C 2004 JUKI CORPORATION. All rights reserved throughout the world. A9902-98P-000 04.08 Printed in Japan (E)