JUKI DDL-9000A Page 70 Engineer'S Manual Download

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(12) Adjustment of the wiper (DDL-9000A-

-WB/OB)

2mm

1mm

Standard Adjustment

Summary of Contents for DDL-9000A

Page 1: ...40059361 No E379 00 ENGINEER S MANUAL Direct drive High speed 1 needle Lockstitch Machine with Automatic Thread Trimmer DDL 9000A ...

Page 2: ...uctions in detail It is advisable to use the Instruction Manual and Parts List for SC 810 and SC 910N together with this Engineer s Manual when carrying out the maintenance of these machines This manual gives the Standard Adjustment on the former section under which the most basic adjustment value is described and on the latter section the Results of Improper Adjustment under which stitching error...

Page 3: ...ustment of reverse feed stitch length manual 26 3 Adjustment of reverse feed stitch length motor power 26 4 Optional switch 28 5 Adjustment of normal reverse stitching 30 6 Adjustment of Feed 0 30 1 Method by removing the gear box cover standard adjustment 30 2 Method without removing the gear box cover fine adjustment 32 7 Adjustment of the feed dial section 34 8 Adjustment of the reverse feed so...

Page 4: ...ssure 68 14 Adjustment of external parts 70 1 Adjustment of the pulley cover 70 2 Clearance of the hand wheel 70 3 Adjustment of the bobbin winder unit 72 1 Replacement of the bobbin friction wheel 73 2 Adjustment of the bobbin winder driver wheel position 73 4 Maintenance 74 1 Oil quantity check 74 2 Application of appropriate grease 74 1 Needle bar lower bushing DDL 9000A M A DS Specification 74...

Page 5: ... 7 equivalent to ISO VG7 2 Gearbox JUKI New Defrix Oil No 2 equivalent to ISO VG32 3 12 Lifting amount of presser Presser lifter lever 5 5 mm By knee 15 mm AK 8 5 mm DB x 1 11 DB x 1 21 DB x 1 SF 9 DB x 1 11 DB x 1 11 9 to 18 20 to 23 8 to 11 9 to 18 9 to 18 134 Nm75 134 Nm130 134 Nm65 134 Nm75 134 Nm75 Nm65 to 110 Nm125 to 160 Nm60 to 75 Nm65 to 110 Nm65 to 110 Sewing space width 300mm 14 Dimensi...

Page 6: ...pt for DDL 9000A DS Pulley cover Feed lever Thread stand Minute adjustable presser lifting screw Control box SC 810 or SC 910N Hand wheel Operation pedal Take up lever cover One touch type reverse feed button Finger guard Wiper Under cover Bobbin winder unit 1st thread tension Stitch dial 2nd thread tension ...

Page 7: ...l thread trimming presser lifting motion only for AK 138 and more by depressing the front or back part of the pedal One touch type reverse feed button This button allows users to conduct reverse stitching Wiper The wiper moves the needle from the sewing material after thread trimming under control of the wiper signal from the control box Bobbin winder unit This unit is integrated into the head uni...

Page 8: ...00A SH Standard feed dog gradient The engraved marker dot on the feed bar shaft is adjusted by a feed dog of relevant standard Shipped feed dog B1613012I00 23614506 A S A MA A S D1613155W00 11403003 A MA A SH Engraved marker dot position on the horizontal feed bar shaft 9000A S 9000A A 0 8mm 9000A SH 1 2mm a b A B a b a b A B Standard Adjustment ...

Page 9: ...izontal feed bracket shaft this can be a cause of unusual sound and improper linearity o If the gradient of the feed dog is adjusted for either shaft only the feed dog height may be changed Adjustments are needed for both shafts in all cases o According to the shaft adjusting position the position of feed dog motion may be shifted In such a case loosen the tightening screw of the X feed arm to adj...

Page 10: ... 6 2 Timing for the needle and the inner hook C D A B B 0 04 to 0 1mm A Standard Adjustment Lubricated hook K Part No 23621303 ...

Page 11: ...e hook setscrews Cautions 1 If this clearance is too small the blade point of the hook may be damaged 2 Too much clearance may give rise to stitch skipping Information about the dry hook A dry hook RP hook is employed for the DDL 9000A DS type For replacement use the part numbers specified below The hook part numbers come in two types according to the specifications 22890206 without the needle gua...

Page 12: ...SH Vertical feed cam engraved marker line 0 10 Feed dial graduations 3 4 In a moment when the feed dog is positioned below the upper surface of the throat plate the upper end A SH lower end of the needle hole shall be 0 1mm from the upper plane of the throat plate Needle and feed timing A SH Other than A SH Needle and feed timing Standard Adjustment ...

Page 13: ...ane of the throat plate In cases other than the DDL 9000A SH coincidence of the engraved marker dot of the pulley cover with the engraved marker dot of the flywheel can be regarded as the standard for needle hole upper end lowering When coincidence is confirmed tighten two lower sprocket screws Tightening torque for reference 4 5N m 5 Adjust the thread trimmer cam timing Refer to 3 11 Thread trimm...

Page 14: ... 10 4 Feed locus and phase 1 Timing standard 2 Timing fast 3 Timing slow Standard Adjustment ...

Page 15: ...stments should be done within 20 2 graduations Cautions 1 When timing of the vertical feed cam is changed the feed timing is also changed against the needle When the timing is adjusted re adjustment is required in accordance with 3 Needle and feed timing 2 The angle of the engraved marker line graduation 1 denotes 10 o When tightening the two setscrews of the vertical feed cam this work should be ...

Page 16: ... insertion 1 Bobbin case with idling prevention spring Drawing is for 11038700 B A C o For the bobbin case with idling prevention spring 1 2 3 4 Ear Change the height 0 3 0 2mm Bobbin revolution Standard Adjustment ...

Page 17: ...on 1 Insert an old needle as illustrated and remove the spring by lifting it up Suggestion Use the thumb to prevent the spring from popping out 2 The spring tension can be changed by changing the height of the arch shaped section of the spring Make sure not to permit the free end of the spring to come out of the bobbin case 3 Firstly set the ear and insert the needle Then settle the ear is the sta...

Page 18: ...er hook presser position Other than DDL 9000A SH DDL 9000A SH Inner hook presser 40032052 40037405 Needle entry About the standard part numbers Standard Adjustment Inner hook As seen from above after removing the throat plate ...

Page 19: ... the center of the embossed part in the inner hook presser o If the embossed part of the inner hook presser has any flaw this can be a cause of thread break age or uneven sewing In such a case the damaged part shall be replaced with a new one o If the inner hook presser is positioned inadequately an extra tension is exerted when the thread comes out of the embossed part This can be a cause of shri...

Page 20: ...brication 1 Method of lubrication Float Float Standard Adjustment DDL 9000A S Specification for minute quantity lubrication DDL 9000A M Specification for semi dry items DDL 9000A DS Specification for dry items ...

Page 21: ...DL 9000A M Specification for semi dry items Face plate needle bar lubrication Lubrication by grease sealed in the needle bar lower metal Hook Forced lubrication by the plunger pump Quantity of oil can be adjusted by the hook oil adjusting screw Lubricant can be fed to the oil tank through the arm lubrication hole 3 DDL 9000A DS Specification for dry items Face plate needle bar lubrication Lubricat...

Page 22: ... Method of lubrication to the oil tank DDL 9000A S and DDL 9000A M only 3 Method of oil drainage from the oil tank DDL 9000A S and DDL 9000A M only A B Engraved marker line MAX Engraved marker line MIN Standard Adjustment ...

Page 23: ... it is possible to check the quantity of oil in the oil tank The quantity of oil is adequate if the oil level stays between the MAX and MIN lines 3 Method of oil drainage from the oil tank DDL 9000A S and DDL 9000A M only When carrying the sewing machine or during maintenance servicing it is possible to remove the lubricant from the oil tank 1 Let the sewing machine fall down 2 Insert the oil pan ...

Page 24: ... 20 7 Lubrication 4 Cleaning of the oil filter DDL 9000A S and DDL 9000A M only Standard Adjustment ...

Page 25: ... 3 Remove the lubrication pipe from the float case 4 Remove thread chips and material dust accumulated in the oil filter Refer to 4 Maintenance 3 Configuration and adjustment of the lubrication mechanism DDL 9000A SS SH MA MS o If there is clogging in the oil filter smooth lubrication cannot be maintained from the lubrication hole Adjustment Procedure Results of Improper Adjustment ...

Page 26: ...on 5 Oil in the gear box 6 Placement displacement of the gear box cover 7 Cautions for gear box cover oil during transportation Adequate oil level line top Adequate oil level line bottom Oil level Standard Adjustment ...

Page 27: ...t Placement procedures 1 Provide for a new gasket Gear box cover gasket Part No 40037166 2 The gear box cover and the bed mounting face shall be kept clean Wipe off waste oil from these parts 3 Tighten nine setscrews of the gear box cover 2 turn tightening 4 Remove the lubrication stop plug from the bed side and replenish 140cc of the JUKI New Defrex Oil No 2 JUKI New Defrex Oil No 2 Part No MDFRX...

Page 28: ...t front metal Bed Hook 3 to 10mm To be applied to the bed wall Oil trace checking paper Approx 70mm Unnecessary to worry about the quality of paper Apply the oil quantity trace checking paper to hook s lower side and check it from a distance of 3 to 10mm Oil quantity small Oil quantity large Oil sprinkles from the hook Oil sprinkles from the hook DDL 9000A SS A M 0 5 to 1mm DDL 9000A SH 1 to 3mm D...

Page 29: ...rew it is possible to carry out stable adjustments 2 Check the oil quantity about three times to confirm the stability 3 If the quantity of oil is too much before adjustments operate the machine continuously for about one minute so that the oil attached to the hook and remaining in the oil path can be flung off completely 11 Replacement of the hook shaft oil wick The hook shaft filter is a consuma...

Page 30: ... Adjustment of the amount of feeding 1 Adjustment of forward feed stitch length 2 Adjustment of reverse feed stitch length manual A 3 Adjustment of reverse feed stitch length motor power Standard Adjustment ...

Page 31: ...the arm 2 Reverse feed takes place when the feed lever is pressed The status that the lever is pressed at the maximum corresponds to the graduation value of the feed adjust dial 3 Adjustment of reverse feed stitch length motor power 1 When the switch is pressed the sewing machine assumes the condition of reverse feed When this switch is released the condition of forward feed is promptly recovered ...

Page 32: ... 28 8 Adjustment of the amount of feeding 4 Optional switch Standard Adjustment ...

Page 33: ...dimension stitching pattern is selected on the CP panel 3 Function of canceling reverse stitching at end once When the switch is pressed reverse stitching at end is canceled once for the next sequence 4 Thread trimming When the switch is pressed thread trimming can be carried out 5 Presser lifter function When the switch is pressed automatic presser lifting is carried out 6 1 stitch compensating s...

Page 34: ...30 8 Adjustment of the amount of feeding 5 Adjustment of normal reverse stitching 6 Adjustment of Feed 0 1 Method by removing the gear box cover standard adjustment M4 hexagon wrench Standard Adjustment ...

Page 35: ...e gear box cover Refer to 3 7 Lubrication 6 Removal mounting of the gear box cover 3 Loosen the feed changing arm B setscrew 4 Adjust the feed adjusting link A and the feed adjusting link B so that they are aligned in a straight line Tighten them with the feed changing arm B setscrew 5 Pinch a piece of paper beneath the presser hardware and turn the flywheel by hand in forward direction to see tha...

Page 36: ... 32 8 Adjustment of the amount of feeding 6 Adjustment of Feed 0 2 Method without removing the gear box cover fine adjustment Screwdriver M4 hexagon wrench Standard Adjustment ...

Page 37: ...ng arm B setscrew 3 Remove the feed changing shaft spring 4 Make fine adjustments by hand for the feed changing shaft arm Cautions The range of adjustment is very small If the adjusting motion is too big the initial position may be lost 5 Pinch a piece of paper beneath the presser hardware and turn the flywheel by hand in forward direction to see that the paper is not fed o Adjustment of the Feed ...

Page 38: ... appropriate grease Arm s engraved marker dot Feed dial 0 Part Configuration Diagram of the feed dial mechanism Insertion of the arm in temporarily joined condition Adjustments with the use of minus screwdriver tip Split section of the feed adjust screw Minus screwdriver Standard Adjustment Arm ...

Page 39: ...in in the arm 6 Enter the feed dial washer and the feed dial spring in the feed dial 7 In the state that the feed dial graduation 0 coincides with the engraved marker dot of the arm join the feed dial screw with the feed adjust screw Cautions After joining confirm that the engraved marker dot of the arm coincides with the feed dial graduation 0 o In the state that the screw does not move any more ...

Page 40: ...8 Adjustment of the amount of feeding 8 Adjustment of the reverse feed solenoid 9 Adjustment of feed changing shaft balancer arm asm positioning Engraved marker line Standard Adjustment Engraved marker dot ...

Page 41: ... of feed changing shaft balancer arm asm positioning 1 By making end plane joining for the feed changing shaft thrust collar tighten the feed changing shaft arm C asm At that time one setscrew of the feed changing shaft arm C asm shall be adjusted to the plat position of the feed changing shaft 2 Join the feed changing shaft balancer arm asm with the end plane of the feed changing shaft arm C asm ...

Page 42: ...ifter 1 Adjustment of the presser pressure 2 Adjustment of thread release changeover A B C C Height of the presser adjusting screw can be read from the upper face value of the nut Example Approx 40mm Standard Adjustment Upward Downward ...

Page 43: ... unit OB Specifications excluded 2 Remove the cap that is located behind the sewing machine Using a hexagonal wrench of 3mm loosen the changeover screw o Lowermost mounting Thread tension release is possible with the knee presser lifter Standard o Uppermost mounting Thread tension release is impossible with the knee presser lifter Cautions Even when thread tension release changeover is ON there is...

Page 44: ...0652 Stopper screw 1 D5119206K0K Stopper collar 2 23610702 Stopper screw nut 1 SL6053592TN Stopper base setscrew 1 Components of the micro lifter unit 4 Adjustment of the micro lifter unit available separately Approx 9mm 22908552 Presser lifter cam using the head connector B1521555000 Presser lifter lever setscrew using the head connector Standard Adjustment ...

Page 45: ...ifter lever and take out the presser lifter lever made of resin material 2 Remove the face plate and hold the presser lifter cam with the fingers in order not to let it move toward inside of the arm Get the presser lifter lever around the presser lifter cam shaft and fix it with the setscrew of the presser lifter lever 3 Temporarily fasten the two screws of the face plate and get the upper setscre...

Page 46: ...t of upper stop position Stop position after thread trimming 2 Adjustment of lower stop position B A C D E F Standard Adjustment Setup No Functions Standard Setting range 121 Upper needle stop position 0 15 to 15 122 Lower needle stop position 0 15 to 15 ...

Page 47: ...on the upper needle stop position is lowered Direction of C When the value is set in direction the upper needle stop position is raised Direction of D 5 When this setting is finished press the switch or to fix the updated value Cautions If the power supply is turned OFF prior to this work the contents cannot be updated 2 Adjustment of lower stop position The goal stop position is secured when read...

Page 48: ...1 Thread trimming unit 1 Standard timing for the thread trimming cam Turn the thread trimming cam by hand in this direction A Operator side Operator side Drawing as seen from A left side Standard Adjustment ...

Page 49: ...ming cam setscrew in this order 3 Adjust hand wheel s engraved marker dot to each specification 4 Pressing the picker to the right let the thread trimming cam mesh with the roller Without turning the lower shaft turn the thread trimming cam only with the use of the finger in the direction opposite to the revolving direction of the lower shaft In the position where the thread trimming cam does not ...

Page 50: ...position of the moving knife Extreme backward position 9000A SS A DS A M 9000A SH Information about the initial position Needle core Needle core 3 to 3 5mm 2 5 to 3mm Moving knife positioning V groove 0 5 m m 0 2 t o 0 7 Standard Adjustment ...

Page 51: ...ter periphery with the V groove engraved marker line on the knife mounting base When the amount of withdrawal is large o It becomes impossible to scoop the needle thread or the bobbin thread at the time of thread trimming When the amount of withdrawal is small o Interference between the feed dog and the moving knife Adjustment Procedure Results of Improper Adjustment Specification Max amount of wi...

Page 52: ... 11 Thread trimming unit 3 Adjustment to the moving knife position Turn the thread trimming cam by hand in this direction A Operator side Operator side Drawing as seen from A left side Standard Adjustment ...

Page 53: ...etscrew 5 Loosen two setscrews of the thread trimming cam and the cam collar 6 Adjust arm s engraved marker dot to the hand wheel marker dot red 7 Turn the thread trimming cam with the finger tip so that its second screw comes to the front When it comes to the front push the hook thread presser to the right 8 Move the thread trimming cam to the right and left so that the thread trimming cam can me...

Page 54: ... 50 11 Thread trimming unit 4 Correct position of the counter knife 9000A SS A DS A M 9000A SH Needle center Set it in the center 0 6mm Needle core 0 5 m m 4 m m 6 m m Standard Adjustment ...

Page 55: ... without fail Also adjust the mounting angle of the counter knife Loosen two the counter knife setscrews and adjust the position of the counter knife Cautions The window hole section of the knife thread guide shall be adjusted so that the needle enters the center of the hole section When the counter knife is adjusted to the right o The bobbin and needle thread drawing length becomes longer than th...

Page 56: ... 52 11 Thread trimming unit 5 Adjustment of rise of the second thread tension disc Standard Adjustment ...

Page 57: ... tension release wire fixing screw and move the thread tension release wire to the right When decreasing the amount of rise Loosen the thread tension release wire fixing screw and move the thread tension release wire to the left Cautions After adjustments tighten the thread tension release wire fixing screw assuredly o If the amount of rise of the second thread tension disc is too small the needle...

Page 58: ... of the fixed knife blade tip Chamfering and careful polishing This face shall be filed Face A Blade tip Face B Sections C and D of the moving knife and the counter knife shall contact with each other at the same time C D Standard Adjustment ...

Page 59: ...e touch between the moving knife and the counter knife it is effective to change the angle in the direction of the arrow as illustrated 2 If the D side does not cut well decrease this angle If the C side does not cut well increase this angle o If the sharpness is still not good even though the blade face has been sharpened sufficiently this is because there is no simultaneous contact on the right ...

Page 60: ... 56 11 Thread trimming unit 7 Replacement of the moving knife Standard Adjustment ...

Page 61: ... and take it out from the lower side of the knife yoke 7 Mounting steps follow the reverse order as above When the moving knife hinge screw is loosened try to move the moving knife by hand to see whether it moves smoothly without rattling 8 Correctly set the yoke groove of the knife yoke in the moving knife pin and tighten the knife yoke hinge screw 9 Insert the moving knife link pin in the knife ...

Page 62: ...he knife thread guide Right angle A p p r o x 4 m m 6 m m f o r S H 0 5 m m Standard Adjustment Knife thread guide Part No Remarks 9000A SS A MS A MA 40044189 9000A DS 40050588 40044189 with special surface treatment 9000A SH 40044190 Needle center ...

Page 63: ... between the knife thread guide and the blade tip of the counter knife In this case the distance is 4mm between the needle center and the blade tip of the counter knife Rectangular mounting 9000A SH 1 The distance is 6mm between the needle center and the blade tip of the counter knife Rectangular mounting Adjustment Procedure Results of Improper Adjustment o If there is no coincidence of the knife...

Page 64: ...s are completed an oblong clearance is secured in the picker link and indispensable return motions damper function can be performed In the status after standard adjustments the bobbin thread presser settles almost in the center of Character U of the bobbin case Standard Adjustment 0 5mm Butt ...

Page 65: ...picker link pin nut 9mm and move the picker link to the right and left for adjustment 4 After the completion of adjustments fasten the parts assuredly 3 Method of standard adjustments Adjustment of tip position 1 Let the sewing machine fall down 2 Assume a condition that the thread trimmer solenoid is attracted by hand 3 Loosen two picker setscrews to adjust positioning 4 After the completion of a...

Page 66: ... 62 11 Thread trimming unit 10 Adjustment of the drive arm stopper Standard Adjustment ...

Page 67: ...den accident such as a service interruption 1 Push the roller arm never turned ON horizontally in the direction of the arrow and press it against the stopper 2 At that time make adjustments with the use of two drive arm stopper setscrews so that the stopper can move in the position where the moving knife does not reach the needle entry position Adjustment Procedure Results of Improper Adjustment ...

Page 68: ...1 Thread trimming unit 11 Replacement of the knife unit Standard Adjustment Knife unit Part No Remarks 9000A SS A MS A MA 40050585 9000A DS 40050586 40050585 with special surface treatment 9000S SH 40050587 ...

Page 69: ...inner hook presser 3 Remove the moving knife link hinge screw and pull up the moving knife link toward you Then take it out from the knife yoke pin 4 Remove the knife unit fixing screw and the picker arm hinge screw and take out the knife unit Adjustment Procedure Results of Improper Adjustment ...

Page 70: ... 66 12 Adjustment of the wiper DDL 9000A WB OB 2mm 1mm Standard Adjustment ...

Page 71: ...s engraved marker dot 2 Using the wiper collar tighten and fix the wiper adjust screw in a fashion to press the wiper At that time a distance of 1mm should be secured between the flat section of the wiper and the needle center 3 Turn OFF the wiper sewsaw switch where the wiper is not used Adjustment Procedure Results of Improper Adjustment ...

Page 72: ... 68 13 Adjustment of feed lever pressure B A Feed lever Standard Adjustment ...

Page 73: ...w and adjust vertical sliding motions Position of the feed change shaft spring hanger o When a sewing machine set under the standard shipment conditions is used at high speed lever beat noise vibration sound may be generated and reliability of the feeding mechanism may be adversely influenced Adjustment Procedure Results of Improper Adjustment Feed lever pressure A Standard shipment conditions Lig...

Page 74: ... 70 1mm 14 Adjustment of external parts 1 Adjustment of the pulley cover 2 Clearance of the hand wheel Standard Adjustment ...

Page 75: ...fully not to pinch cables and others 2 Clearance of the hand wheel 1 The clearance is 1mm between the hand wheel and the pulley cover For adjustments loosen the hand wheel setscrews 2 pcs o This can be a cause of marker dot displacement from the hand wheel o This can be a cause of maloperation o If a clearance is too much this can be a possible cause of entanglement of the thread from the thread s...

Page 76: ... the bobbin winder unit Let the bobbin winder lever coincide with the head of bobbin winder unit setscrew B 14mm In the state of OFF the standard distance of the bobbin winder lever is 14mm from the bobbin winder shaft Standard Adjustment Operator side ...

Page 77: ...ews 2 pcs of the bobbin winder driver wheel 3 Mount the bobbin winder unit on the arm 4 Turn ON the bobbin winder lever and let the head coincide with the bobbin winder lever At that time the head of the bobbin winder unit setscrew shall be made to coincide with the bobbin winder lever 5 Lightly make the bobbin winder driver wheel lightly contact with the bobbin winder friction wheel and tighten t...

Page 78: ... 74 4 Maintenance 1 Oil quantity check 2 Application of appropriate grease 1 Needle bar lower bushing DDL 9000A M A DS Specification Standard Adjustment ...

Page 79: ...s however periodic replenishment of the appropriate grease is effective approximately once every one to two years 1 Needle bar lower bushing DDL 9000A M A DS Specification Cautions This work should be done in the state that the needle bar and others are installed 1 Remove the face plate 2 Remove the greasing screw 3 Remove the cap of the appropriate grease and enter the feeder tip in the lubricati...

Page 80: ... 76 2 Feed bar mechanisms Loosen the setscrew and screw in and pull the M4 screw Grease groove filled with appropriate grease Grease groove filled with appropriate grease Standard Adjustment ...

Page 81: ...000A DS Specification 4 At the time of reassembly after the disassembly of various parts apply the appropriate grease to the sliding surfaces of the feed bar mechanism For the specification of lubrication hook 9000A S 9000A M o Lubrication is continued while hook oil is scattered around the vertical feed cam o When the reduced amount of hook oil is used a small amount of application is acceptable ...

Page 82: ... 78 3 Face plate mechanism 5mm DDL 9000A SS SH only Standard Adjustment Section where the appropriate grease is applied Exclusive greasing point Slide portion between arm guide and roller ...

Page 83: ...tion 5mm below the needle bar upper bushing If there is no contact correct it by means of the oil wick support plate Cautions Apply a piece of paper to the oil wick and confirm whether it is wet with oil o Grease is not required for the presser bar If grease is applied contamination like black ink is caused by the presser bar bushing and the material cloth may be stained o This can be a cause of s...

Page 84: ...Fixed to the arm Fixed to the bed This part is not used in the DDL 9000A MA and MS The float case guide is entered in the slide guide of the peep window Float case cap appropriative to DDL 9000A DS Lubrication mechanism configuration of the DDL 9000A SS SH MA MS Standard Adjustment ...

Page 85: ... feeling of coupling with a click sound 2 Float The float has an orientation Insert it in the float case with the shorter end closer to the operator Be careful not to bend the bar of the float 3 Float case guide Put the float case guide in the guide groove section of the peep window and fix it to the bed 4 Peep window Remove the window plate located behind the arm It is fixed to the arm 5 Oil filt...

Page 86: ... mechanism This is an integrated press fitting component that cannot be disassembled Standard Adjustment Section where the appropriate grease is applied Part name Part No JUKI Grease A 40006323 Info about the appropriate grease ...

Page 87: ...take up lever support shaft Cautions The first screw in the revolving direction shall be made to coincide with the flat section of the shaft 10 Drive the needle bar upper bushing to install the parts of needle bar and needle bar connector 11 Eliminate thrust rattling from the thread take up lever support shaft and fix the thrust collar of the thread take up lever support shaft 12 Turn the hand whe...

Page 88: ... 84 5 Replacement of the motor 6 Replacement of the timing belt Timing belt Second screw First screw Hand wheel Standard Adjustment Standard Adjustment ...

Page 89: ...edures below reassembly can be carried out in the reverse order for disassembly o If no clearance is secured this can be a cause of motor bearing de struction o After disassembly reproducibility will be lost The timing belt used is a product of the highest quality Therefore no maintenance is required To make ready for responding to extra occasions the method of replacement is explained below 1 Ref...

Page 90: ...tachment and positions of external parts 219 5 M4 Depth 4 2XM4 Depth 4 13 5 Ruler seat 40035589 2 4 61 149 M4 Depth 4 62 5 M5 Depth 10 M8 Depth 9 80 156 M5 Depth 4 2X3 M5 Depth 8 8 5 139 7 82 2 X ø 1 0 Standard Adjustment ...

Page 91: ...nt of oil is fed 1 Take out the lubrication hook 2 Remove the hook shaft filter asm that is mounted on the hook shaft tip 3 Install a lower shaft stop plug screw and O ring which is available separately 4 Adjust the amount of hook oil so that lubrication is maintained to a degree wet with a small amount of hook oil Cautions 1 Do not drain oil from the oil tank 2 Be careful not to allow the oil tan...

Page 92: ... 4 CON 5 BT_SW 6 BT 7 TL_SUB 8 TRM_COM 9 1 2 3 4 5 6 7 8 9 WP_COM 10 10 FG 11 11 CON_COM 12 12 BT_RTN 13 13 BT_COM 14 14 TL_SUB_COM 1 FL 2 1 2 FL_COM Motor Reverse feed Thread trimmer Thread wiper Presser lifter PWR board asm CTL board asm SC 910N CN140 CN39 CN46 CN40 CN48 U V W Table of Connector Conversion between SC 810 and SC 910N SC 810 SC 910N CN48 CN48 CN30 CN39 CN36 CN46 CN37 CN40 Black Bl...

Page 93: ...ntity Hook cooling unit 400 23431 1 Filter regulator asm 400 23432 1 Finger valve PV 0151220 00 1 Filter regulator PF 0551060 A0 1 Regulator bracket PF 9020050 00 1 Plug PJ 0251000 03 1 Pipe bracket asm 400 23433 1 Pipe bracket 400 23434 1 Blowing pipe 400 23435 1 Wire holder A 110 45408 1 Urethane hose black BT 0400251 EB 1 Pan head screw 11 64 40 L 7 SS 4110715 SP 1 Mounting screws SK 3412001 SE...

Page 94: ...s type 1 E The needle thread is detached If there is a clearance at the tip of the hook thread presser at thread trimming due to wrong when the plunger is pushed by a finger toput the thread position of the hook thread trimming solenoid into the suction state and the hook thread presser presser is pushed into until the tip of the presser reaches the bobbin conduct readjustment with reference to 3 ...

Page 95: ...over Alternatively the thread is likely to be released from a loose material 3 B The needle is too thick The thinner the needle is the better the situation becomes unless no defective needle thread tension is found 3 C The needle hole of the throat Replace the current throat plate with a throat plate with smaller plate is too large needle hole 3 D The pressure is too low Use the presser stroke adj...

Page 96: ...iming of the tread trimming Inspect and adjust the standard timing of the thread is too late trimming cam with reference to 3 11 1 1 C The counter knife is set too back Adjust the counter knife with reference to 3 11 4 3 The underside of the material is not 3 1 The needle thread passing through 1 A Refer to the previous item The Refer to the previous item The needle thread passing neat at sewing s...

Page 97: ...too late Slipping of the needle thread from the needle immediately needle immediately after thread hook timing causes the moving after thread trimming results from cutting the needle thread trimming knife to cut the needle thread to passing though the needle due to defective thread spread hold 3 threads before thread ing by the moving knife In such a case Thread chips of separation 40mm level exis...

Page 98: ...just the blade inclination and readjust the with those of the moving knife mounting position of the counter knife 7 The bobbin thread is untrimmed 7 1 The backward movement of the 1 A The backward movement of the Measure the backward movement length of the moving knife But the needle thread is trimmed moving knife is insufficient moving knife is inappropriately Adjust the position of the thread tr...

Page 99: ...them Use an appropriate gauge and needle for the thread thickness 9 3 The thread trimming drive unit 3 A The mounting position of the Make an adjustment with reference to 3 11 10 does not function thread trimming drive unit is inappropriate 9 4 The timing belt slips 4 A The tension of the timing belt is Replace the timing belt too low 4 B The knife pressure is excessive Adjust the engagement betwe...

Page 100: ...oo high Minimize the pressure For some materials sewing with the presser slightly floated with the adjustable screw of the minute presser lifter is effective 3 B The finish of the backside of the Use a buff or the like to smooth the presser presser is rough 3 C The presser is made from Use a fluorine resin presser or a special processed presser Nonsmooth material 1 4 The material is inappropriatel...

Page 101: ...th new one is inappropriate 5 F The feeding speed is too high Reduce the feeding speed 5 G Others Use a small gauge for a gap between the throat plate groove and feed dog in the moving direction without interference with the movement of the feed dog when a feeding pitch is small 2 Uneven material feed 2 1 Feeding is inappropriate 1 A The height of the feed dog is Lower the height of the feed dog 0...

Page 102: ...r possibility of balloon stitches or thread breakage 2 B The tension is too low The thread take up spring with too low tension cannot function well at high speeds or sufficiently take up the thread resulting in a higher possibility of balloon stitches or thread breakage 2 C The shape of the thread take Thread slack may cause catching thread when the tip of up spring is inappropriate the thread tak...

Page 103: ...The bobbin or bobbin case is 7 A Inappropriate engagement Replace the bobbin or bobbin case defective between the bobbin and bobbin case causes the bobbin thread to be caught 7 B Defective thread winding around Adjust the tension and position of the bobbin thread the bobbin winder causes the Also be aware of uneven winding bobbin thread to be caught 7 C The tension adjusting spring of Replace the ...

Page 104: ...ive sewing is likely to occur when the needle The needle is not mounted fully recess portion faces frontward to the end 1 C The needle tip is blunt Replace the needle 1 D The needle is too thin or thick Replace the needle for the thread to be used 1 E The feeding force is too weak Lift the feed dog height 4 2 The matters related to the hook 2 A The blade top of the hook is Sharpen the blade top of...

Page 105: ...oot bend 5 Needle thread breakage 5 1 The thread path including the 1 A The thread path is not smooth Finish the thread path appropriately throat plate and foot is defective 1 B The thread path has a flaw Finish the thread path appropriately 1 C The thread path has an obstacle Check threading again and conduct correction if necessary 5 2 The tension of the needle thread 2 A The tension of the need...

Page 106: ... Hook oil is insufficient Adjust the hook oil volume to the appropriate level 5 6 The matters related to the hook 6 A The thread path of the hook has Replace the needle are inappropriate a flaw 6 Thread breakage at back or back tuck 6 1 The needle mounting direction 1 A The needle mounting direction Mount the needle so that the needle recess portion faces sewing is inappropriate is inappropriate i...

Page 107: ...g for a 60 or thicker thread 7 Thread breakage at needle entry or idle 7 1 Same as 6 Thread breakage at 1 A Same as 6 Thread breakage Same as 6 Thread breakage at back or back tuck sewing stitching back or back tuck sewing at back or back tuck sewing 7 2 The position of the knife thread Make an adjustment so that the needle comes to the hole center guide is inappropriate 7 3 The position of the ne...

Page 108: ...Try using B1418227T00 or B1418552A00 defective 9 Material breakage 9 1 The needle is defective 1 A The needle heat is too high Use silicon 1 B The needle is too thick Use a needle as thin as possible 1 C The needle tip is blunt Replace the needle 1 D The shape of the needle tip is Use a ballpoint needle KN S J B U Y etc inappropriate different needle type 9 2 The speed is too high Reduce the speed...

Page 109: ... the bobbin case the bobbin case is defective 2 D The bobbin thread idles in the Adjust the tension of the idling prevention spring with bobbin case reference to 3 5 2 E The bobbin is inserted into the Refer to 3 5 Irregular stitches are corrected by rotating bobbin case in the wrong direction the bobbin in the reverse direction 11 3 The needle or bobbin thread Increase the tension of the needle o...

Page 110: ...needle entry and presser bend if there is no needle entry 6 D The presser is floating Adjust the clearance between the presser bar holder and lifting plate 11 7 Backlash exists in the moving 7 A Irregular stitches occur due to Check whether there is a backlash and eliminate the back direction pitch fluctuation resulting from lash if necessary variation in speed 11 8 The stroke of the thread take u...

Page 111: ...positions Y Y Section Rubber Installation Reference Figure X X Section Rubber Installation Reference Figure C1 5 to C2 5 only for hinged section Dimension Drawing in Detail 2 1 Style of type Helvetica Reg Condensed Vided Letters Thickness 1 5 Thickness 0 8 Thickness 0 5 Thickness 1 5 2 ø3 4 Depth at the rear side 10 Drill a hole at the time of set up 2 ø3 5 Depth 10 3 ø13 Depth 13 2 ø3 5 Depth 10 ...

Page 112: ...MEMO ...

Page 113: ...an E This manual uses environment friendly soyink The environmental management system to promote and conduct 1the technological and technical research the development and design of the products in which the environmental impact is consid ered 2the conservation of the energy and resources and the recycling in the research development design distribution sale and mainte nance service of the industri...

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