Maintenance; Care Of The Machine; Belts; Changing The Light Bulbs - Husqvarna Viking 990 Operation Manual

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To keep your sewing machine operating satisfactorily
it requires, like other precision machines, regular clean
ing. It need not, however, be lubricated.
The stitchplate should occasionally be removed.
Remove the presser foot and lower the feed teeth. There
is a recess in the free arm to the right above the hook
cover. Push the stitch plate straight up approx. 1 mm and
backward at the same time until it loosens. Clean be
tween the feed teeth with the brush you will find in the
accessory box.
When replacing the stitch plate, insert it from behind
into the recess in the arm. Ease the front edge up onto
the small pin and continue to push it forward until it
snaps into place.
Whenever necessary the bobbin case and hook should
also be brushed clean. Sizing or finishing compounds
from fabric may adhere to the spindle of the hook. If this
has happened, the spindle should also be cleaned with
the brush. Remove any pieces of thread which may have
become wound around the spindle.
Belt adjustment is not required.
The machine is equipped with two lights, to provide
the best possible lighting and avoid shadowing from the
presser bar and needle bar. They are located on each side
of the needle bar, as illustrated. In both cases, the plastic
guard can be removed by inserting the small screwdriver
at the rear edge of the guard, by the arrows, and apply
ing slight downward leverage.
Do not turn the light, just pull it downward and fit in a
new one. The plastic guard can now be replaced in the
recess. Start by inserting the front edge and press it into
the holder.
Use light bulbs designed for 12 V and maximum 5 W
as indicated on the light guard.
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