CLEANING
Using a short bristle brush (not point of
scissors
or
Tilt
machine back on hinges.
Wrap
clean rag around
other sharp instrument),
remove
lint and other waste magnet,
shown
in Fig. 7, on oil
pump
body
and
pul
from
around sewing hook,
from
between feed rows and accumulated foreign particles
from
magnet.
underside
of
throat
plate
and from all
other
operating
points.
CLEAN
Wipe
exterior of machine dry with a soft cloth.
MAGNET
Fig.
7. Magnet on Oil Pump Body
SPEED
Maximum
speed for machine 281-1 and 281-21 is
6000
stitches
per minute.
Maximum
speed for Machine 281-3 is 5000
stitches
per
minute.
It is
advisable
to
operate
new
machines
at a
speed
of 500
stitches
less
than maximum, for
the
first
100
hours of
operation.
NEEDLES
Machines
281-1
and
281-3
Use SINGER* Needle, Catalog 1955, in
sizes
rang
ing from 8 to 22.
Machine
281-21
Use SINGER* Needle Catalog 1361, in
sizes
rang
ing from 8 to 22.
Size of
needle
to be used should be determined by
weight of thread and type of material being sewn.
Orders for
needles
should specify quantity required,
size
number and catalog number.
For
example:
100 No. 16,
Catalog
1361
Needles
SETTING
THE
NEEDLE
Turn machine pulley over toward operator until
needle
bar
reaches
highest
point
as
shown in
Fig.
8.
Loosen
needle
clamping
screw.
Insert
needle
into
needle
bar
as
far
as
it will go, with long groove of
needle
to
the
left
and
eye
of
needle
directly
in line
with arm of
machine.
Then
tighten
the clamping
screw.
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