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Oiling
and
cleaning
the
rnachine"
Fig.
21.
During
sewing,
thread
ends
and
ftuff
collect
in
rhe
shuttle
path.
These
are
liable
to
interfere
with
the
smooth
oPera-
irion
of
the
machine and must therefore be removed, and to
do
this,
the
shuttle must
be
taken
out.
Place
the
needte
bar
in
its
highest
position, open
rhe
shuttle
door
and
remove
the
bobbin case.
Pressure
ot.r.
spring L, Fig. 24,
will
open
the
shuttle
path
and shutrle
2
can then be
removed,
after
which
it
is
easy
to
clean
the
shuttle path,
first
with
a
brush
and
afterwards
with a
match
or
other
implement
not
too
hard
or
pointed,
wound
round
with
a
piece
of
material
or'
cotton
wool..
Clean
the shuttle at the
same
time
and lubri
cate
it by
wiping
the
bearing
Path
with a
piece
of
cl<
I
t
I
r
moistened
with
a
drop
of oil" In
order
to
avoid
oil
gcrtirrri
on the
thread and
material,
it is
important
that
oilirrq
2A
Oiling
and
cleaning
the
machine"
should
not
be carried
our in
any other
u.oy.
The
cenrre
pin
3
in
the
shuttle should
also
be given
a drbp
of
oil"
The
tension
of
the under thread may
sornerimes
alter
as
a
result
of
dust
or
thread
fluff
collecting
undern.uth
the
thread tension spring
on
the
bobbin
case.
If
so,
it
is
neces-
sfl,ry
to
unscrew
the spring
and clean
it.
Itiil.
25.
Arrows
show
the points
which
require oiling.
Thc
1'rarts
irr thc
upper arm
of
the machine should
also
bc
oiled,
c.s[)ccially
thc
take-up
lever and
t.he
parrs
which
im-
part,
mov('r'l'tcnr
ro the
needle
bar,
the
ztg-zag
mechalti.sltr
and
parts irr rlrc lo\\,cr
Arm.
See
Fiqs.
22,
ZS
and
2C.
tj
l
2t
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