Singer Centurion 121D - TO TEST HOOK LUBRICATION

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
,.
TO TEST HOOK LUBRICATION
Thread
machine
and
sew
3
yards
of
scrap
material.
Pay
no
attention
to
stitch
quality
or
amount
of
oil
at
this
time.
Remove
material
and
bed
slide.
Run
machine
approximately
one
minute
to
establish
a
uniform
oil
flow.
Without
stopping
machine,
hold
a
piece
of
paper
in
place
under
hook
for
10
seconds.
Remove
paper
and
compare
oil
pattern
with
Fig. B
for
proper
oil
flow.
•,
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....
...
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•
•-I,
FIG. B
If
there
is
no
trace
of
oil
or
an
excess,
adjustment
should
be
made
with
the oil
metering
screw.
In
order
to
gain
access
to oil
metering
screw,
the
hook
should
be
in
position
as
shown
in Fig.
C.
Turn
oil
metering
screw
clockwise
for
more
oil
and
counterclockwise
for
less
(Fig. D).
Normal
setting
is
made
by
turning
the
metering
screw
all
the
way
in
and
then
backing
the
screw
3
or
4
turns
out.
More
or
less
turns
may
be
required
depending
on
the
operation
being
performed.
Oil
Metering
Screw
Oil
Metering
Screw
More
Oil Less Oil
FIG. C FIG. D
2