Maintenance And Inspection - Brother ZM-851A Instruction Manual

This sewing machine should only be used by opera-
tors 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.
Turn off the power switch at the following times,
otherwise the machine may operate if the treadle 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
* When using a clutch motor, the motor will keep turn-
ing even after the power is switched off as a result
of the motor's inertia. Wait until the motor stops fully
before starting work.
Turn off the power switch before carrying out
cleaning, otherwise the machine may operate if
the treadle is depressed by mistake, which could
result in injury.
* When using a clutch motor, the motor will keep turn-
ing even after the power is switched off as a result
of the motor's inertia. Wait until the motor stops fully
before starting work.
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.
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 treadle is
depressed by mistake, which could result in injury.
• When carrying out inspection, adjustment and main-
tenance
• When replacing consumable parts such as the rotary
hook
* When using a clutch motor, the motor will keep turn-
ing even after the power is switched off as a result
of the motor's inertia. Wait until the motor stops fully
before starting work.
iii
CAUTION
Sewing
Cleaning

Maintenance and inspection

ZM-850A, 851A (English)
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, 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, so that no oil gets into your
eyes or onto your skin, otherwise inflammation can
result.
Furthermore, do not drink the oil under any circum-
stances, as it can cause vomiting and diarrhoea.
Keep the oil out of the reach of children.
If the power switch needs to be left on when carrying
out some adjustment, be extremely careful to observe
all safety precautions.
Be careful not to touch your fingers or the lubrication
amount check sheet against moving parts such as the
rotary hook or the feed mechanism when checking the
amount of oil supplied to the rotary hook, otherwise
injury may result.
Use only the proper replacement parts as specified by
Brother.
If any safety devices have been removed, be abso-
lutely 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.