MAINTENANCE
Clean and oil machine daily. For best results, use genuine Fischbein Cleaning Solvent and Lubricating
Oil obtainable from the
Dave
Fischbein
Company
or any Authorized Representative.
Wash
out dirt as
follows:
Unthread
needle.
With
machine
running,
dip portion
shown,
Fig.
No.
1, in three or four inches
of solvent for about 10 seconds.
Then
in
addition
to the oil cups
on
the
machine,
oil all shafts, feed
dog carrier mechanism, and cutting knife parts. (Important: Do not use gasoline or similar as a cleaning
solvent.)
If
machine
skips stitches or fails to chain
off,
the cause
could
be any of the
following:
Excessive
wear,
requiring
rebuilding
or servicing;
improper
threading or tension (see special instructions on threading and
tension enclosed with this form); bent or incorrectly installed needle; damaged or misadjusted looper;
incorrect needle bar setting.
To
check these adjustments or replace these parts, carefully
follow
instructions
listed
below:
Do not disturb main bearing, part No. D605, or looper cam, part No. D310. They are timed and
set
at factory.
NEEDLE
INSTALLATION
Insert new needle into needle bar as far as it will go, with the long groove facing exactly outside of
machine.
The long
groove
will
enter into bar.
Lock
needle securelywith
wrench
provided
with
machine.
See Fig. No. 2.
LOOPER
INSTALLATION
Remove
needle,
throat plate,feed
dog,
and presser
foot.
(To
remove
presser
foot,
loosen
the
two
presser
foot
set
screws,
remove
needle
bar
guard,
part
No.
DlOl.
Using
a
screwdriver
as a
lever,
lift
up
the presser bar
clamp,
part
No.
D405,
which
will
allow
the presser foot
sufficient
clearance to
slide
off
the
bottom
of
presser
bar.
DO
NOT
loosen
or altersettingof the
presser
bar
clamp,
part
No.D405.
i
Loosen
looper
set
screw,
No.
SS832316
and
remove
old
looper.
Insert
new
looper,
making
sure that
it is
down
in
the
looper
holder,
part
No.D301-l,as
far as It
will
go.
Securely
tighten
looper
set
screw
against
flat
on
looper
shank.
Install
new
straight
needle.
NOTE;
The
point
of the
looper
must
pass
through
the center of the
needle
scarf
with
about
1/64"
clearance
between
looper
point
and
needle.
See
"A,"
Fig.
No.
3.
(The
scarf is the
hollowed
out
section
just
above
the
eye
of the
needle.
See
Fig.
No.
3.)
Unless
the
looper
holder
and/or
needle
bar
have
moved
or
have
slipped,
the
looper
will
time
up
automatically.
If
necessary,
adjust
clearance
between
looper
point
and
needle
by
loosening
the
looper
holder
clamp
screw
and
sliding
the
looper
holder
in
or
out
on
looper
shaft
as
required.
See next
paragraph
for
needle
bar setting.
LOOPER
TIMING
ADJUSTMENT
This adjustment does not have to be made when replacing the looper. but only after looper shaft, looper
cam, or cam follower has been replaced.
The looper stroke Is correct when there is approximately
1/32"
between looper point and edge of needle
when looper is at maximum back stroke. See "D," Figure No. 4. To adjust, first rotate machine in
sewing
direction
so that
looper
is at
maximum
back stroke
position,
then
loosen
clamp
screw
No.
SC54058in part
No.
D307
and
move
looper as necessary.
NEEDLE
BAR
ADJUSTMENT
Remove
needle
bar
guard,
part
No.
DlOl.
Torn
machine
pulley
in
normal
sewing
direction
until
looper
Is in
approximate
position
shown
in
Fig.
No.
5 as
needle
Is
on the
upstroke.
Slightly
loosen
clamping
screw on
needle
bar
clamp,
part
No.
D502.
Raise
or
lower
needle
bar and/or turn
machine
pulley
to
bring
looper
point
flush
with
or not
more
than 1/64"
back
from
edge of
needle,
see "B,"
Fig.
No.
5,
and
to
align
bottom
edge
of
looper
flush
with
top of
needle
eye,
see "C,"
Fig.
No.
5.
Do
not
change
looper
setting.
Securely
lock
needje
bar
clamp
and
replace
needle
bar
guard.
Recheck
for
proper
needle/looper clearance.
Fig.
No.
3.
STITCH
LENGTH
The length of stitch is
SVz
to the inch, when, at their highest point, the teeth of the feed dog protrude
3/32"
above the throat plate. If the stitches shorten up, check the following:
1. Teeth on feed dog may be worn down. Feed dog must then be replaced.
2. Feed dog
may
have slipped so that the teeth protrude less than 3/32".
Merely
raise the feed dog
by raising the adjusting screws No. HD64038 located on the feed carrier block. Note that there is a
set
of locking screws No. HD64038 on the under side of the feed carrier block.
D
Figure
No. 1
Figure No. 2
Figure
No.
3
Figure
No.
4
Figure
No.
5
From the library of: Superior Sewing Machine & Supply LLC
