Oilshould also be applied to the top feed drive joints and to the oiling points marked by arrows
in Fig.
40.
The oil level In the hook lubrication system can be inspected through the oil
sight
glass. If it
is
below
the
mark, top up
the
reservoir by inserting the
spout
of the oil can into the aperture
at
the
top of
the
oil
sight
glass. Make sure
the
oil level
does
not rise
above
the
red mark. Any
quantity
of oil In
excess,
or
short,
of
the
proper
amount
may
cause
irregularities in
the
oilflow.
If oil bubbles
should
occur in the hook oilline or the oilflow to the
sewing
hook has to be
adjusted,
call
your
maintenance
man.
In order to ensure trouble-free sewing, form
the
habit of tilting
the
machine back
once
a
day
and
removing
the
lint
that
has
accumulated
between
feed dog and needle plate
and
in the
vicinity
of
the
sewing
hook,
using
a
brush
for
this
purpose.
When
you
oil
the
needle
bar
bearings,
take
a
brush
and
remove
the
dust
which
has
accumulated
at the
needle-bar
end
of
the
machine. In this way, you prevent the particles of dressing which,
in most instances, contain plastic, from mixing with the oil and forming an undesirable film
on
the
parts.
The
machine
should
be
cleaned
with a dry, soft rag on
the
underside regularly.
24
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