This sewing machine should only be
used by operators who have received
the necessary training in safe use before-
The sewing machine should not be used
for any applications other than sewing.
Turn off the power switch at the follow-
ing times, otherwise the machine may
operate if the treadle is pressed by mis-
take, which could result in injury.
When threading the needle
When replacing the needle and bob-
When not using the machine and
when leaving the machine unattended
Attach all safety devices before using the
sewing machine. If the machine is used
without these devices attached, injury
Turn off the power switch before carry-
ing out cleaning, otherwise the machine
may operate if the treadle is pressed by
mistake, which could result in injury.
Maintenance and inspection
Maintenance and inspection of the sew-
ing 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.
Turn off the power switch and discon-
nect the power cord from the wall out-
let at the following times, otherwise the
machine may operate if the treadle is
pressed by mistake, which could result
When carrying out inspection, adjust-
ment and maintenance
When replacing consumable parts
such as the rotary 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 pneu-
Do not touch any of the moving parts or
press any objects against the machine
while sewing, as this may result in per-
sonal injury or damage to the machine.
For machines with automatic presser
lifter, do not touch the solenoid section,
because it becomes hot during operation
and may cause severe burns when
If an error occurs in machine, or if abnor-
mal noises or smells are noticed, imme-
diately turn off the power switch. Then
contact your nearest Brother dealer or a
If the machine develops a problem, con-
tact your nearest Brother dealer or a
Be sure to wear protective goggles and
gloves when handling the lubricating oil,
so that no oil gets into your eyes or onto
your skin, otherwise inflammation can
Furthermore, do not drink the oil under
any circumstances, as it can cause vom-
iting and diarrhoea.
Keep the oil out of the reach of children.
If the power switch and air need to be
left on when carrying out some adjust-
ment, be extremely careful to observe all
When checking the rotary hook lubrica-
tion, do not touch moving parts such as
the rotary hook, needle and needle bar
with your finger or paper nor push them
with other objects, otherwise injury or
damage to the machine may result.
Use only the proper replacement parts
as specified by Brother.
If any safety devices have been re-
moved, 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 modifi-
cations to the machine will not be cov-
ered by the warranty.
– ii –
TN-840B, 870B (English)