Brother 431C User Manual
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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

This service manual is intended for KE-430Bseries,KE-430Cseries,BE-438B,BE-438C,KE-484C;be sure to read theKE-430Bseries,KE-430Cseries,BE-438B,BE-438C,KE-484Cinstruction 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.

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

and surroundings.

Symbols

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 youmust 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”.)

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KE-430B,430C series

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 sources of strong electrical noise such as high-frequencywelders.

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.

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.

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

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

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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

Be sure to wear protective goggles when using the

devices attached, injury may result.

 

machine.

Do not touch any of the moving parts or press any

If goggles are not worn, there is the danger that if a

objects against the machine while sewing, as this

needle breaks, parts of the broken needle may enter

may result in personal injury or damage to the

your eyes and injury may result.

machine.

Set the needle to the needle up stop position before

If an error occurs in machine operation, or if abnormal

turning off the power.

noises or smells are noticed, immediately turn off the

If this is not done, the wiper may strike the needle,

power switch. Then contact your nearest Brother

which might cause the needle to break.

dealer or a qualified technician.

Turn off the power switch at the following times,

If the machine develops a problem, contact your

otherwise the machine may operate if the foot switch

nearest Brother dealer or a qualified technician.

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

Be sure to wear protective goggles and gloves when

turning off the power.

 

 

handling the lubricating oil and grease, so that they

If this is not done, the wiper may strike the needle,

do not get into your eyes or onto your skin, otherwise

which might cause the needle to break.

 

inflammation can result.

Turn off the

power switch

before

carrying out

Furthermore, do not drink the oil or eat the grease un-

der any circumstances, as they can cause vomiting

cleaning, otherwise the machine may operate if the

and diarrhoea.

foot switch is

depressed by

mistake,

which could

Keep the oil out of the reach of children.

result in injury.

 

 

 

 

 

 

 

Maintenance and inspection

 

Maintenance and inspection of the sewing machine

If the power switch and air need to be left on when

 

should only be carried out by a qualified technician.

carrying out some adjustment, be extremely careful to

 

Ask your Brother dealer or a qualified electrician to

observe all safety precautions.

 

 

 

carry out any maintenance and inspection of the

Hold the machine head with both hands when tilting it

 

electrical system.

back or returning it to its original position.

 

Set the needle to the needle up stop position before

Furthermore, after tilting back the machine head, do

 

turning off the power.

not push the face plate side or the pulley side from

 

If this is not done, the wiper may strike the needle,

above, as this could cause the machine head to

 

which might cause the needle to break.

topple over, which may result in personal injury or

 

Turn off the power switch and disconnect the power

damage to the machine.

 

Use only the proper replacement parts as specified

 

cord from the wall outlet at the following times,

 

otherwise the machine may operate if the foot switch

by Brother.

 

is depressed by mistake, which could result in injury.

If any safety devices have been removed, be abso-

 

When carrying out inspection, adjustment and main-

lutely sure to re-installthem to their original positions

 

tenance

and check that they operate correctly before using

 

When replacing consumable parts such as the ro-

the machine.

 

tary hook

Any problems in machine operation which result from

 

Disconnect the air hoses from the air supply and wait

unauthorized modifications to the machine will not be

 

for the needle on the pressure gauge to drop to “0”

covered by the warranty.

 

before carrying out inspection, adjustment and repair

 

 

of any parts which use the pneumatic equipment.

 

 

 

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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

Safety devices

Eye guard

Finger guard

3 High temperature warning displayThread take-up cover

Thread take-upsolenoid 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-upcover

Frame side cover

2670Q

Eye guard

 

 

 

Thread take-up

Belt cover

solenoid cover

 

 

 

 

Finger guard

 

 

 

 

 

 

 

KE-430B

KE-430C

 

2737Q

 

 

KE-430B,430C series

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