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KE-430B, 430C, 431B, 431C
SERVICE MANUAL
KE-432B, 432C, 433B
KE-434B, 434C, 435B, 435C
KE-436B, 436C, 484C
BE-438B, 438C
Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
ELECTRONIC LOCKSTITCH BAR TACKER
ELECTRONIC LOCKSTITCH BELT LOOP BAR TACKER
ELECTRONIC LOCKSTITCH PATTERN TACKER
ELECTRONIC LOCKSTITCH BUTTON SEWER
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This service manual is intended for KE-430B series, KE-430C series, BE-438B, BE-438C, KE-484C; be sure to read the KE-430B series, KE-430C series, BE-438B, BE-438C, KE-484C instruction manual before this manual. Carefully read the “SAFETY INSTRUCTIONS” below and the whole of this manual to understand this product before you start maintenance. As a result of research and improvements regarding this product, some details of this manual may not be the same as those for the product you purcha
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2. Notes on safety DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are present can result in severe injury. CAUTION Environmental requirements Use the sewing machine in an area which is free from The ambient temperature should be within the range sources of strong electrical noise such as of 5 C to 35 C during use. high-frequ
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CAUTION Sewing This sewing machine should only be used by opera- If using a work table which has casters, the casters tors who have received the necessary training in safe should be secured in such a way so that they cannot use beforehand. move. The sewing machine should not be used for any Attach all safety devices before using the sewing applications other than sewing. machine. If the machine is used without these devices attached, injury may result. Be sure to wear protective go
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3. Warning labels The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer. 1 2 Safety devices Eye guard Finger guard Thread take-up cover High temperature warning display 3 Thread take-up solenoid cover Belt cover Frame side cover, etc. Be sure to connect the ground. If the ground conn
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CONTENTS 1. SPECIFICATIONS ............................... 1 3-16. Thread wiper mechanism.................................. 44 3-17. Thread nipper mechanism................................ 47 1-1. SPECIFICATIONS........................................... 1 3-18. Thread take-up mechanism.............................. 49 1-2. Standard thread tension................................... 5 3-19. Thread trimmer mechanism.............................. 51 2. MECHANICAL DESCRIPTIONS ........
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5. ADJUSTMENT..................................... 99 5-24. Adjusting the home position.............................. 126 5-25. Adjusting the needle up stop position............... 129 5-1. Adjusting the needle bar height........................ 99 5-26. Adjusting the tension of the upper shaft timing 5-2. Adjusting the needle bar lift amount................. 100 belt ................................................................... 129 5-3. Adjusting the driver needle guard..........
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1. SPECIFICATIONS １. SPECIFICATIONS １-１. SPECIFICATIONS 1 Bar tacking length 1 Ordinary materials Ordinary materials 2 6 -14 mm 5 2 Denim 2 Denim Bar tacking length 7 Knitted materials 3 14 - 25 mm 7 Knitted materials KE-432B KE-433B KE-430B KE-431B Electronic lockstitch Electronic lockstitch Electronic lockstitch Electronic lockstitch eyelet buttonhole decorative pattern bar tacker belt loop bar tacker end bar tacker tacker Stitch formation Single needl
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1. SPECIFICATIONS 1 Medium materials 2 Heavy materials KE-436B Electronic lockstitch KE-435B KE-434B BE-438B pattern tacker Electronic lockstitch Electronic lockstitch Electronic lockstitch pattern tacker with stepping foot pattern tacker button sewer with stepping foot and programming function Stitch formation Single needle lock stitch Maximum sewing speed 2,500 rpm (Pitch 3 mm) 2,500 rpm Maximum pattern size 100 60 mm max. 0 - 6.4 0 - 6.4 mm Feed mechanis
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1. SPECIFICATIONS 1 Ordinary materials Bar tacking length 2 6 -14 mm 2 Denim 7 Knitted materials Bar tacking length 3 14 -25 mm KE-432C KE-430C KE-431C BE-438C Electronic lockstitch Electronic lockstitch Electronic lockstitch Electronic lockstitch eyelet buttonhole bar tacker belt loop bar tacker button sewer end bar tacker Stitch formation Single needle lock stitch Maximum sewing speed 2,700 rpm 2,500 rpm Maximum pattern size 30 26 mm max. 30 10
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1. SPECIFICATIONS 1 Medium materials 2 Heavy materials KE-436C Electronic lockstitch KE-435C KE-484C KE-434C pattern tacker Electronic lockstitch Electronic lockstitch Electronic lockstitch pattern tacker with stepping foot pattern tacker pattern tacker with stepping foot and programming with treble hook function Stitch formation Single needle lock stitch 2,200 rpm Maximum sewing speed 2,500 rpm (Pitch 3 mm) (Pitch 3 mm) Maximum pattern size 100 60 mm max. Fe
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1. SPECIFICATIONS １-２. Standard thread tension [KE-430B, 430C, 431B, 431C, 432B, 432C, 433B, 434B, 434C, 435B, 435C, 436B, 436C] Medium materials Heavy materials (Denim) Knitted materials (Ordinary materials) Use Standard hook Large hook Standard hook Large hook Standard hook #50 or #30 or Upper thread ← ← #60 or equivalent equivalent equivalent #60 or #50 or Lower thread ← ← #80 or equivalent equivalent equivalent Upper thread tension 0.8 - 1.2 1.0 - 1.3 1.2 - 1.6 1.4 - 1.8 0.8
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1. SPECIFICATIONS １-２-１. Measuring tension Upper thread tension Lower thread tension 3564Q 3565Q Thread take-up spring height Thread take-up spring tension 1–2 mm Measure the value when the thread take-up spring starts to extend. 3566Q 3567Q * When the spring height (stroke) is great or the spring tension is insufficient, it may cause the thread end length to vary after thread trimming. KE-430B, 430C series 6
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2. MECHANICAL DESCRIPTIONS ２ ２. MECHANI . MECHANICAL CAL DESCRI DESCRIPTIONS PTIONS The mechanisms operate in the order of the numbers given in the illustrations. ２ ２- -１ １. Needl . Needle e bar and thread bar and thread take-up mechanism take-up mechanisms s With stepping foot 1. Pulley 2. Upper shaft <3> Stepping foot connecting rod 3. Thread take-
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2. MECHANICAL DESCRIPTIONS KE-484C 1. Pulley 2. Upper shaft 3. Thread take-up crank 4. Needle bar crank 5. Needle bar connecting rod 6. Needle bar clamp 7. Needle bar 3241 41Q Q KE-430B, 430C series 8
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2. MECHANICAL DESCRIPTIONS ２ ２- -２ ２. Lower shaft and shuttle race mechanisms . Lower shaft and shuttle race mechanisms 1. Pulley 2. Upper shaft 3. Crank rod assy 4. Rock gear 5. Lower gear 6. Lower shaft 7. Driver 8. Shuttle hook 3242Q Q KE-484C 1. Pulley 2. Upper shaft 3. Timing pulley 4. Timing belt 5. Tension pulley arm 6. Lower shaft timing pulley 7. Lower shaft 8
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2. MECHANICAL DESCRIPTIONS ２-３. Work clamp lifter mechanism 3244Q 1. Work clamp solenoid 2. Plunger 3. Link assy, C 4. Link shaft, B 5. Link, B 6. Link shaft, C 7. Work clamp plate 8. Work clamp arm lever plate 9. Work clamp arm lever shaft 10.Work clamp arm lever 11.Work clamp * When the presser solenoid is turned off, the presser plate rises, and work clamps lower. KE-432B, 432C BE-438B, 438C
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2. MECHANICAL DESCRIPTIONS 3245 45Q Q Pneumatic specifications 1. Air cylinder 2. Work clamp arm lever shaft 3. Work clamp arm lever 4. Work clamp KE-430B, 430C series 11
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2. MECHANICAL DESCRIPTIONS ２-４. Work clamp open-close mechanism (KE-432B, 432C) 1. Solenoid assy 2. OY solenoid pin 3. Sensor plate 3262Q 4. Work clamp carrier rod assy 5. Lever 6. Roller 7. Work clamp carrier plate 8. Work clamp guide plate 9. Screw 10.Work clamp KE-430B, 430C series 12
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2. MECHANICAL DESCRIPTIONS ２ ２- -５ ５. Thread wiper mechanism . Thread wiper mechanism 3246 3246Q Q When the presser solenoid is turned off, the presser plate rises, and thread wiper operates in the opposite direction. 1. Work clamp solenoid 2. Plunger 3. Link assy, C 4. Link shaft, B 5. Thread wiper driving lever 6. Thread wiper rod assy 7. Thread wiper arm assy 8. Thread wiper 3247Q Q S
