Brother International CB3-B917 Service Manual - Page 16

Disassembly

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2. DISASSEMBLY 2. DISASSEMBLY CAUTION Turn off the power switch before starting any cleaning work, otherwise the machine may operate if the pedal is depressed by mistake, which could result in injury. * The motor will keep turning even after the power is switched off as a result of the motor's inertia. Wait until the motor stops fully before starting work. 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. Disassembly of the sewing machine should only be carried out by a qualified technician. 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. 2-1. Cover 4. Face plate thread guide 6. Top cover 4. Needle bar cover 7. Bolt 1. Button tray 4. Face plate thread guide 4.Sub-tension thread guide 2. Eye guard 5. Face plate 3. Needle 2-2. Clutch 9. Brake 2. Ball bearing (5/16) 3. V-belt 4. Pulley 5. Ball bearing (7/32) 6. Spring 201s 8. Arm cover 8. Looper cover 1. Ball presser plate 7. Set screw 10. Clutch 8. Clutch tension spring 202s CB3-B916A/B917A 10

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2. DISASSEMBLY
CB3-B916A/B917A
10
2. DISASSEMBLY
2-1. Cover
2-2. Clutch
Turn off the power switch before starting any
cleaning work, otherwise the machine may
operate if the pedal is depressed by mistake,
which could result in injury.
* The motor will keep turning even after the
power is switched off as a result of the motor’s
inertia. Wait until the motor stops fully before
starting work.
Disassembly of the sewing machine should only
be carried out by a qualified technician.
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.
CAUTION
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.
Use only the proper replacement parts as
specified by Brother.
Any problems in machine operation which result
from unauthorized modifications to the machine
will not be covered by the warranty.
201s
1. Button tray
2. Eye guard
3.
Needle
4.Sub–tension
thread guide
5.
Face
plate
4. Face plate thread guide
4. Needle bar cover
4. Face plate thread guide
6. Top cover
7. Bolt
8. Arm cover
8. Looper cover
1. Ball presser plate
2. Ball bearing (5/16)
3. V-belt
4. Pulley
5. Ball bearing (7/32)
6. Spring
7. Set screw
8. Clutch tension spring
10. Clutch
202s
9. Brake