Brother KE-434B, 435C, 431B, 434C, 432C User Manual

KE-430B, 430C, 431B, 431C KE-432B, 432C, 433B KE-434B, 434C, 435B, 435C KE-436B, 436C, 484C

SERVICE MANUAL

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

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 purchased.

If you have any questions regarding this product, please contact a Brother dealer.

SAFETY INSTRUCTIONS

1. Safety indications and their meanings

This service manual and the indications and symbols that are used on the machine itself are provided in order to ensure safe operation of this machine and to prevent accidents and injury to yourself or other people. The meanings of these indications and symbols are given below.

Indications

DANGER

The instructions which follow this term indicate situations where failure to follow the instructions will almost certainly result in death or severe injury.

CAUTION

Symbols

･･････

The instructions which follow this term indicate situations where failure to follow the instructions could cause injury when using the machine or physical damage to equipment and surroundings.

This symbol ( ) indicates something that you should be careful of. The picture inside the triangle indicates the nature of the caution that must be taken. (For example, the symbol at left means “beware of injury”.)

This symbol ( ) indicates something that you must not do.

This symbol ( ) indicates something that you must do. The picture inside the circle indicates the nature of the thing that must be done. (For example, the symbol at left means “you must make the ground connection”.)

i

KE-430B, 430C series

2. Notes on safety

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.

DANGER

CAUTION

Environmental requirements

Use the sewing machine in an area which is free from sources of strong electrical noise such as high-frequency welders. Sources of strong electrical noise may cause problems with correct operation.

Any fluctuations in the power supply voltage should be within 10% of the rated voltage for the machine. Voltage fluctuations which are greater than this may cause problems with correct operation.

The power supply capacity should be greater than the requirements for the sewing machine’s electrical consumption. Insufficient power supply capacity may cause problems with correct operation.

The pneumatic delivery capability should be greater than the requirements for the sewing machine’s total air consumption. Insufficient pneumatic delivery capability may cause problems with correct operation.

Installation

Machine installation should only be carried out by a qualified technician.

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

The sewing machine weighs more than 52 kg. The installation should be carried out by two or more people.

Do not connect the power cord until installation is complete, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

Hold the machine head with both hands when tilting it back or returning it to its original position. Furthermore, after tilting back the machine head, do not push the face plate side or the pulley side from above, as this could cause the machine head to topple over, which may result in personal injury or damage to the machine.

Be sure to connect the ground. If the ground connec-

tion is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

The ambient temperature should be within the range of 5C to 35C during use. Temperatures which are lower or higher than this may cause problems with correct operation.

The relative humidity should be within the range of 45% to 85% during use, and no dew formation should occur in any devices. Excessively dry or humid environments and dew formation may cause problems with correct operation.

Avoid exposure to direct sunlight during use. Exposure to direct sunlight may cause problems with correct operation.

In the event of an electrical storm, turn off the power and disconnect the power cord from the wall outlet. Lightning may cause problems with correct operation.

All cords should be secured at least 25 mm away from any moving parts. Furthermore, do not excessively bend the cords or secure them too firmly with staples, otherwise there is the danger that fire or electric shocks could occur.

Install the belt covers to the machine head and motor.

If using a work table which has casters, the casters should be secured in such a way so that they cannot move.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin, otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhoea. Keep the oil out of the reach of children.

KE-430B, 430C series

ii

CAUTION

Sewing

This sewing machine should only be used by operators who have received the necessary training in safe use beforehand.

The sewing machine should not be used for any applications other than sewing.

Be sure to wear protective goggles when using the machine. If goggles are not worn, there is the danger that if a needle breaks, parts of the broken needle may enter your eyes and injury may result.

Set the needle to the needle up stop position before turning off the power. If this is not done, the wiper may strike the needle, which might cause the needle to break.

Turn off the power switch at the following times, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

 When threading the needle  When replacing the needle and bobbin  When not using the machine and when leaving the

machine unattended

Cleaning

Set the needle to the needle up stop position before turning off the power. If this is not done, the wiper may strike the needle, which might cause the needle to break.

Turn off the power switch before carrying out cleaning, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

If using a work table which has casters, the casters should be secured in such a way so that they cannot move.

Attach all safety devices before using the sewing machine. If the machine is used without these devices attached, injury may result.

Do not touch any of the moving parts or press any objects against the machine while sewing, as this may result in personal injury or damage to the machine.

If an error occurs in machine operation, or if abnormal noises or smells are noticed, immediately turn off the power switch. Then contact your nearest Brother dealer or a qualified technician.

If the machine develops a problem, contact your nearest Brother dealer or a qualified technician.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin, otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhoea. Keep the oil out of the reach of children.

Maintenance and inspection

Maintenance and inspection of the sewing machine should only be carried out by a qualified technician.

Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.

Set the needle to the needle up stop position before turning off the power. If this is not done, the wiper may strike the needle, which might cause the needle to break.

Turn off the power switch and disconnect the power cord from the wall outlet at the following times, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

 When carrying out inspection, adjustment and main-

tenance

 When replacing consumable parts such as the ro-

tary hook

Disconnect the air hoses from the air supply and wait for the needle on the pressure gauge to drop to “0” before carrying out inspection, adjustment and repair of any parts which use the pneumatic equipment.

If the power switch and air need to be left on when carrying out some adjustment, be extremely careful to observe all safety precautions.

Hold the machine head with both hands when tilting it back or returning it to its original position. Furthermore, after tilting back the machine head, do not push the face plate side or the pulley side from above, as this could cause the machine head to topple over, which may result in personal injury or damage to the machine.

Use only the proper replacement parts as specified by Brother.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

Any problems in machine operation which result from unauthorized modifications to the machine will not be covered by the warranty.

iii

KE-430B, 430C series

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

3

High temperature warning display

Safety devices

Eye guard Finger guard Thread take-up cover Thread take-up solenoid cover Belt cover Frame side cover, etc.

4

5

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

Direction of operation

Thread take-up cover

Frame side

cover

e guard

Ey

Thread take-up solenoid cover

Belt cover

2670Q

Finger guard

KE-430B KE-430C

KE-430B, 430C series

2737Q

iv

１. SPECIFICATIONS

１-１. SPECIFICATIONS

1

Ordinary materials 2

5 2 Denim 7 Knitted materials

Stitch formation Single needle lock stitch Maximum sewing speed Maximum pattern size Feed mechanism Stitch length Number of stitches Maximum stitch number 20,000 stitches (including 10,000 stitches which can be added) Work clamp lifter Solenoid type Work clamp height Rotary hook Shuttle hook (shuttle hook 2, optional)

Electronic lockstitch

Bar tacking length

3

KE-430B

bar tacker

6 -14 mm

14 - 25 mm

30 10 mm max. 12 3 mm max. 30 30 mm max. R- intermittent feed mechanism (pulse-motor driven mechanism)

KE-431B

Electronic lockstitch

belt loop bar tacker

2,700 rpm 2,500 rpm

0.1 - 10.0 mm

17 mm max.

KE-432B

Electronic lockstitch

eyelet buttonhole

end bar tacker

Variable

1 Ordinary materials 2 Denim 7 Knitted materials

Electronic lockstitch

decorative pattern

KE-433B

tacker

Wiper device Standard equipment Thread trimmer device Standard equipment Thread take-up device Standard equipment Data storage method P-ROM (Any sewing pattern can be added using PS-3000.) Number of user programs Number of cycle programs

35 sewing patterns are

Number of stored data

Motor Three-phase 400W induction motor Weights

Power source

set already

(Up to 100 patterns can be added. Total number of stitches of stored data

6 sewing patterns are

set already

which can be added is within 10,000.)

Machine head: 52 kg, Operation panel: 0.6 kg,

Control box: 9 - 19 kg (depending on destination)

Single-phase 110, 220 - 230, 240V

3-phase 220-230, 380, 400V

Maximum electric power consumption; 600VA

16

4

3 sewing patterns are

set already

1

KE-430B, 430C series

1 Medium

materials

2 Heavy materials

KE-436B

KE-434B

Electronic lockstitch

pattern tacker

KE-435B

Electronic lockstitch

pattern tacker

with stepping foot

Electronic lockstitch

pattern tacker with stepping foot and programming

function

Stitch formation Single needle lock stitch

1. SPECIFICATIONS

BE-438B

Electronic lockstitch

button sewer

Maximum sewing speed Maximum pattern size 100 60 mm max.

2,500 rpm (Pitch 3 mm) 2,500 rpm

0 - 6.4 0 - 6.4 mm Feed mechanism R- intermittent feed mechanism (pulse-motor driven mechanism) Stitch length Number of stitches

0.1 - 10.0 mm Variable

20,000 stitches

Maximum stitch number

20,000 stitches (including 10,000 stitches

which can be added)

20,000 stitches

(One pattern)

(including 10,000

stitches which can

be added)

Work clamp lifter Work clamp height Rotary hook

Solenoid type or

pneumatic type

Pneumatic type Solenoid type

17 mm max. (for solenoid)

25 mm max. (for pneumatic) (Max. 17 mm for inner clamping device)

Shuttle hook (shuttle hook 2, optional)

13 mm max.

Wiper device Standard equipment Thread trimmer device Standard equipment Thread take-up device Standard equipment

Stepping foot lift amount 18 mm Stepping foot stroke 0 mm, 3 - 8 mm

Safety device

built-in stopping mechanism

P-ROM (Any sewing

Data storage method

P-ROM (Any sewing pattern can be added

using PS-3000.)

3.5 floppy disk

2HD/1.44MB, 2DD

pattern can be

added using

PS-3000.)

Number of user programs Number of cycle programs

16

4

16

4

49 sewing patterns are

set already

Number of stored data

(*)

Motor Three-phase 400W induction motor Weights

Machine head: 56 kg, Operation panel: 0.6 kg (2.8 kg: KE-436B),

Control box: 9 - 19 kg (depending on destination)

Single-phase 110, 220 - 230, 240V

Power source

3-phase 220-230, 380, 400V

Maximum electric power consumption; 600VA

* Up to 100 patterns can be added. Total number of stitches of stored data which can be added is within 10,000.

KE-430B, 430C series

(*)

2

1. SPECIFICATIONS

1 Ordinar

y materials

2 Denim

Knitted materials

7

Bar tacking length

2

Bar tacking length

3

6 -14 mm

14 -25 mm

KE-430C

Electronic lockstitch

bar tacker

KE-431C

Electronic lockstitch

belt loop bar tacker

KE-432C

Electronic lockstitch

eyelet buttonhole

end bar tacker

Electronic lockstitch

Stitch formation Single needle lock stitch Maximum sewing speed Maximum pattern size Feed mechanism Stitch length Number of stitches

30 26 mm max. 30 10 mm max. 12 3 mm max. 0 - 6.4 0 - 6.4 mm

R- intermittent feed mechanism (pulse-motor driven mechanism)

2,700 rpm 2,500 rpm

0.1 - 10.0 mm Variable

Maximum stitch number 20,000 stitches (including 10,000 stitches which can be added) Work clamp lifter Solenoid type Work clamp height

17 mm max. 13 mm max.

Rotary hook Shuttle hook (shuttle hook 2, optional)

BE-438C

button sewer

Wiper device Standard equipment Thread trimmer device Standard equipment Thread take-up device Standard equipment Data storage method P-ROM (Any sewing pattern can be added using PS-3000.) Number of user programs Number of cycle programs

Number of stored data

61 sewing patterns are

set already

(Up to 100 patterns can be added. Total number of stitches of stored data

6 sewing patterns are

set already

16

4

3 sewing patterns are

set already

49 sewing patterns are

which can be added is within 10,000.)

Motor Three-phase 400W induction motor Weights

Machine head: 52 kg, Operation panel: 0.6 kg,

Control box: 9 - 19 kg (depending on destination)

Single-phase 110, 220 - 230, 240V

Power source

3-phase 220-230, 380, 400V

Maximum electric power consumption; 600VA

set already

3

KE-430B, 430C series

1. SPECIFICATIONS

1 Medium 2 Heavy materials

Stitch formation Single needle lock stitch Maximum sewing speed Maximum pattern size 100 60 mm max.

Feed mechanism R- intermittent feed mechanism (pulse-motor driven mechanism)

materials

KE-434C

Electronic lockstitch

pattern tacker

KE-435C

Electronic lockstitch

pattern tacker

with stepping foot

2,500 rpm (Pitch 3 mm)

KE-436C

Electronic lockstitch

pattern tacker with stepping foot and programming

function

Electronic lockstitch

pattern tacker

with treble hook

KE-484C

2,200 rpm

(Pitch 3 mm)

Stitch length Number of stitches

0.1 - 10.0 mm Variable

20,000 stitches

Maximum stitch number

20,000 stitches (including 10,000 stitches

which can be added)

20,000 stitches

(One pattern)

(including 10,000

stitches which can

be added)

Work clamp lifter Work clamp height Rotary hook Shuttle hook (shuttle hook 2, optional)

Solenoid type or

pneumatic type

Pneumatic type

17 mm max. (for solenoid), 25 mm max. (for pneumatic)

(Max. 17 mm for inner clamping device)

Treble hook

Wiper device Standard equipment Thread trimmer device Standard equipment Thread take-up device Standard equipment

Stepping foot lift amount 18 mm Stepping foot stroke 0 mm, 3 - 8 mm

Safety device

built-in stopping mechanism

P-ROM (Any sewing

Data storage method

P-ROM (Any sewing pattern can be added

using PS-3000.)

3.5 floppy disk

2HD/1.44MB, 2DD

pattern can be

added using

PS-3000.)

Number of user programs Number of cycle programs

16

4

16

4

Number of stored data (*)

Motor Three-phase 400W induction motor Weights

Machine head: 56 kg, Operation panel: 0.6 kg (2.8 kg: KE-436C),

Control box: 9 - 19 kg (depending on destination)

Single-phase 110, 220 - 230, 240V

Power source

3-phase 220-230, 380, 400V

Maximum electric power consumption; 600VA

* Up to 100 patterns can be added. Total number of stitches of stored data which can be added is within 10,000.

KE-430B, 430C series

(*)

4

1. SPECIFICATIONS

１-２. Standard thread tension

[KE-430B, 430C, 431B, 431C, 432B, 432C, 433B, 434B, 434C, 435B, 435C, 436B, 436C]

Use

Upper thread Lower thread

Upper thread tension

(N)

Lower thread tension

(N)

T hread take-up

spring height

(mm) Thread take-up s pring tension

(N)

Pre-t (N) ension

Medium materials

(Ordinary materials)

Standard hook Large hook Standard hook Large hook Standard hook

#50 or

equivalent

#60 or

equivalent

0.8 - 1.2 1.0 - 1.3 1.2 - 1.6 1.4 - 1.8 0.8 - 1.2

0.2 - 0.3

6 - 8

0.3 - 0.4

0.5 - 0.8

← ←

←

Heavy materials (Denim) Knitted materials

#30 or

equivalent

#50 or

equivalent

0.2 - 0.3

6 - 8

0.5 - 0.6

0.3 - 0.5

← #60 or equivalent ← #80 or equivalent

←

0.25 - 0.3

6 - 8

0.3 - 0.4

0.5 - 0.8

Needle

[BE-438B, 438C, KE-484C]

Model BE-438B BE-438C KE-484C

Needle

Upper thread #60 or equivalent #60 or equivalent #4 or equivalen t Lower thread

Upper thread tension Lo n

T hread take-up

T spring tension

Pre-tension (N)

(N)

wer thread tensio

(N)

spring height

(mm)

hread take-up

(N)

DP×5＃14 ← DP×17NY＃19 ← DP×5＃9

TQ×1＃12 TQ×1＃ NY＃12 12 DP×17 DP×17＃25

#60 or equivalent or equivale #4 or equivalent #60 nt

0.7 - 1.3 0.7 - 1.3 0.7 - 1.5 4.5 - 5.0 0 0 1

.3 - 0.4 .3 - 0.4 .0 - 1.2

6 - 8 6 - 8 0 - 5

0.4 - 0.6 0.4 - 0.6 2.0 - 2.5

0.1 - 0.3 0.1 - 0.3 0.05 - 0.3 0.3 - 0.5

5

KE-430B, 430C series

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

3566Q

1–2 mm

Measure the value when the thread take-up spring starts to extend.

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

2. MECHANICAL DESCRIPTIONS

２. MECHANICAL DESCRIPTIONS ２. MECHANICAL DESCRIPTIONS

The mechanisms operate in the order of the numbers given in the illustrations.

２-１. Needle bar and thread take-up mechanisms ２-１. Needle bar and thread take-up mechanisms

With stepping foot

3240Q 40Q

7

<3> Stepping foot connecting rod <4> Stepping foot arm <5> Stepping link assy <6> Presser bar lifter <7> Stepping foot

KE-430B, 430C series

1. Pulley

2. Upper shaft

3. Thread take-up crank

4. Needle bar crank

5. Needle ba r conne cting ro d

6. Needle bar clamp

7. Needle bar

KE-484C

3241Q 41Q

2. MECHANICAL DESCRIPTIONS

1. Pulley

2. Upper shaft

3. Thread take-up crank

4. Ne

edle bar crank

5. Needle ba r conne cting ro d

6. Needle bar clamp

7. Needle bar

KE-430B, 430C series

8

2. MECHANICAL DESCRIPTIONS

２-２. Lower shaft and shuttle race mechanisms ２-２. Lower shaft and shuttle race mechanisms

3242Q Q

KE-484C

1. Pulley

2. Upper shaft

3. Timing pulley

4. Timing belt

5. Tensi on pulley arm

6. Lower shaft timing pulley

7. Lower shaft

8. Lower gear

9. Rotary hook shaft 1

0.Treble hook assy

1. Pulley

2. Upper shaft

3. Cra

nk rod assy

4. Rock gear

5. Lower gear

6. Lower shaft

7. Driver

8. Shuttle hook

3243

Q3243Q

9

KE-430B, 430C series

2. MECHANICAL DESCRIPTIONS

２-３. Work clamp lifter mechanism

1. Work clam p solenoi d

2. Plunger

3. Link assy, C

4. Link shaft, B

5. Link, B

6. Link shaft, C

7. Work clam p plate

8. Work clamp a rm lever plate

9. Work clamp a rm lever shaft

10.Work clamp arm lever

11.Work clamp

* When the presser solenoid is turned off, the

presser plate rises, and work clamp s lo wer.

KE-432B, 432C BE-438B, 438C

3266Q 3267Q

7. Work

clamp lifting rod

8. Work clamp lifter lever

9. Presser adjusting plate assy

10. Button clamp holder shaft

11. Work clamp

7. Work

clamp lifting rod

8. Button clamp lifting lever

9. Button clamp holder hook assy

10. Button clamp holder shaft

11. Button clamp

3244

Q

KE-430B, 430C series

10

2. MECHANICAL DESCRIPTIONS

Pneumatic specifications

3245Q45Q

1. Air cylinder

2. Work clamp a rm lever shaft

3. Work clam p arm leve r

4. Work clamp

11

KE-430B, 430C series

2. MECHANICAL DESCRIPTIONS

２-４. Work clamp open-close mechanism (KE-432B, 432C)

3262Q

1. Solenoid assy

2. OY solenoid pin

3. Sensor plate

4. Work cla mp c arri er ro d as sy

5. Lever

6. Roller

7. Work clam p carrier plat e

8. Work clam p guid e plate

9. Screw

10.Work clamp

KE-430B, 430C series

12

2. MECHANICAL DESCRIPTIONS

２-５. Thread wiper mechanism ２-５. Thread wiper mechanism

Solenoid type thread wiper

3246Q3246Q

When the presser solenoid is turned off, the presser plate rises, and thread wiper operates in the opposite direction.

1. Work clam p solenoi d

2. Plun

ger

3. Link assy, C

4. Link shaft, B

5. Thread wi pe r drivin g lever

6. Thread wi pe r ro d assy

7. Thread wi pe r arm assy

8. Thread wiper

3247QQ

1. Thread wi pe r so le noid

2. Thread wi pe r co nne cting rod as sy

3. Thread wi pe r arm assy

4. Thread wiper

13

KE-430B, 430C series

Stepping foot specifications

3248Q Q

KE-484C

3249Q 3249Q

2. MECHANICAL DESCRIPTIONS

1. Thread wi pe r so le noid

2. Thread wi pe r co nne cting rod as sy

3. Thread wi pe r arm assy

4. Thread wiper

1. Thread wi pe r cyli nd er

2.

Thread wiper connecting rod lever

3. Thread wi pe r co nne cting rod

4. Thread wi pe r arm assy

5. Thread wiper

KE-430B, 430C series

14

2. MECHANICAL DESCRIPTIONS

２-６. Feed mechanism

Sewing patterns are created through combination s of X and Y movements.

KE-430B, 431B, 432B, 433B, BE-438B KE-430C, 431C, 432C, BE-438C

X direction

3250Q

Y direction

3251Q

1. Pulse motor, X

2. Coupling hub, 6.35

3. Coupling spacer

4. Coupling hub, 8

5. Feed cam, X

6. Feed cam roller

7. X-feed lever

8.

Tack length regulator block assy

9. Feed bracket

1. Pulse motor, Y

2. Coupling hub, 6.35

3. Coupling spacer

4. Coupling hub, 8 d cam, Y

5. Fee

6. Feed cam roller

7. Y-feed lever

8. Tack width feed shaft

9. Feed bracket

15

KE-430B, 430C series

KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C

X direction

Y direction

2. MECHANICAL DESCRIPTIONS

1. Pulse motor, X

2. Coupling hub, 8

3. Coupling spacer

3252Q

4. Coupling hub, 8

5. Feed cam, X

6. Feed cam roller

7. X-feed lever

8. Tack length regulator block assy . Feed bracket

9

1. Pulse motor, Y

2. Coupling hub, 8

3. Coupling spacer

4. Coupling hub, 8

3253

Q

5. Feed cam, Y

6. Fee

d cam roller

7. Y-feed lever

8. Tack width regulator block assy

9. Feed bracket

KE-430B, 430C series

16

2. MECHANICAL DESCRIPTIONS

２-７. Thread trimmer mechanism

3254Q

1. Thread trimmer solenoid

2. Driving lev er push lever

3. Thread driving lever

4. Thread trimmer roller

5. Thread trimmer cam

6. Thread trimmer rod

7. Thread trimmer lever

8. Connecting rod lever assy

9. Thread trimmer connecting rod

10. Movable knife

11. Fixed knife

17

KE-430B, 430C series

KE-484C

3255Q

2. MECHANICAL DESCRIPTIONS

1. Thread trimmer solenoid

2. Driving lev er push lever

3. Thread driving lever

4. Thread trimmer roller

5. Thread trimmer cam

6. Thread trimmer rod

7. Thread trimmer lever

8. Thread trimmer rod, L

9. Thread trimmer connecting rod

10. Movable knife

11. Thread trimmer cylinder

12. Extension rod

13. Fixed knife

KE-430B, 430C series

18

2. MECHANICAL DESCRIPTIONS

２-８. Thread nipper mechanism

Manual operation

In thread trimming

3256Q

1. Thread trimmer solenoid

2. Driving lev er push lever

3. Thread driving lever

4. Tension release driving lever

5. Lower thread retainer collar

6. Thread trimmer cam

1. Lifting lever

2. Lifting crank

3. Tensi on release lever

4. Tension release stud

5. Tension release pin

3257Q

7. Tension release driving lever

8. Tension release lever, U

9. Tension release rod assy

10. Tension release lever

11. Tension release stud

12. Tension release pin

19

KE-430B, 430C series

KE-484C

3258Q

2. MECHANICAL DESCRIPTIONS

1. Tension release cylinder

2. Tensio n release pin push leve r

3. Tensio n release pin, L

4. Ten

sion release pin

KE-430B, 430C series

20

2. MECHANICAL DESCRIPTIONS

２-９. Thread take-up mechanism

Stepping foot specifications

KE-484C

3260

3259Q

1. Th

read take-up solenoid

2. Solenoid joint

3. Thread take-up lever crank

4. Thread take-up lever

Q

3261Q

1. Thread take-up cylinder

2. Thread take-up lever

21

KE-430B, 430C series

３. DISASSEMBLY

3. DISASSEMBLY

Disassembly should only be carried out by a qualified technician.

Turn off the power switch before disassembly, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin, otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhea. Keep the oil out of the reach of children.

Disassemble each part in order of the numbers.

３-１. Covers

KE-430B, 431B, 432B, 433B, BE-438B KE-430C, 431C, 432C, BE-438C

CAUTION

3268Q

Disconnect the air hoses from the air supply and wait for the needle on the pressure gauge to drop to “0” before disassembly of any parts which use the pneumatic equipment.

Use only the proper replacement parts as specified by Brother.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

Any problems in machine operation which result from unauthorized modifications to the machine will not be covered by the warranty.

3269

1. Top cover

2. Belt cover

3. Frame side cover

4. Bed cover, L F

5. Bed cover, L R

6. Bed cover, R

7. Eye guard assy

8. Face plate assy

9. Shuttle race cover assy

Q

KE-430B, 430C series

22

3. DISASSEMBLY

KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C

<KE-435B, 435C> <KE-436B, 436C>

3269Q

1. Top

cover

3270Q

2. Belt cover

3. Frame side cover

4. Bed cover, L F

5. Bed cover, L R

6. Bed cover, R

7. Eye guard assy

8. B o lt s [2 pcs]

9. Face plate assy

10. Shuttle race cover assy

11. Auxiliary plate supports [2 pcs]

12. Needle plate auxiliary plate

13. Auxiliary plate supports [4 pcs]

23

KE-430B, 430C series

Brother KE-434B, 435C, 431B, 434C, 432C User Manual

SAFETY INSTRUCTIONS

1. Safety indications and their meanings

2. Notes on safety

3. Warning labels

CONTENTS

１. SPECIFICATIONS

１-１. SPECIFICATIONS

１-２. Standard thread tension

１-２-１. Measuring tension

２. MECHANICAL DESCRIPTIONS ２. MECHANICAL DESCRIPTIONS

２-１. Needle bar and thread take-up mechanisms ２-１. Needle bar and thread take-up mechanisms

２-２. Lower shaft and shuttle race mechanisms ２-２. Lower shaft and shuttle race mechanisms

２-３. Work clamp lifter mechanism

２-４. Work clamp open-close mechanism (KE-432B, 432C)

２-５. Thread wiper mechanism ２-５. Thread wiper mechanism

２-６. Feed mechanism

２-７. Thread trimmer mechanism

２-８. Thread nipper mechanism

２-９. Thread take-up mechanism

３. DISASSEMBLY

３-１. Covers