
4)
Testing
·•· ··• ··• ··• ··• •·• ••· ··• ••·
•••
............
···
·••
•••
·•· ·•· ·•·
...
·••
···
··• ...
···
...
··· ···
......
s
4.
Operation
•·· ··· ••·
···
·•• ··•
...
··•
...
··· ... ··· ··· ...
·•·
...
··•
··•
...
•••
...
··•
···
...
···
··•
...
···
.........
9
4.1
Se
lecting
sewing
thread
.....................................................................
9
4.2
Needle
and
thre:ad
···
•··
···
··•
...
·•· ···
··
· •·• ··•
...
·
••
......
...
···
...
•·· ···
···
...
..
.
..........
10
4.3
Fitting
needle
...
......
···••
·
...
•••
...
•••
...
··•
.....
. ·•·
......
•·•···
...
·•·
......
···
............
i1
4.4
Threading
... ···
......
••·
............
··•
.........
••·
•·•
...
·•·
...
...
......
... ··· ··· ... ··· .
•.
..
.
···11
4.5
Winding
bobbin···
....
..
.
........
•·· ··• ·•• ·•· ···
··· ... ···
•·· •··
...
·
··
··•
...
······
.........
··· ...
11
4.6
Threading
bobbin
ease
..................................................................
.
.....
13
4.7
Loading
and
unloadng
bobbin····
··
.........
.
..
•••·•••••••·
...
··· .
.....
·
·····
...
••• .
..
···
·•·
14
4.8
Regulate
needle
gauge
•nd
feeding•··
......
··• •··
........................
......
............
15
4.9
Threa
d
tension
..................
···
............................................................
15
4.10
Regulating
pressure
of
pre~r
...............
·-
...
...
.......
.......
....
......
.......
..
...
17
4.11
Regulating
thread
hook
...................................................
.
..............
17
5.
Regulating
machine
...
··•
...........................
···
........................
···
... •·•
...
..
.......
17
5.1
Adjusting
looping
time
of
rotary
hoolo;
.........
·••
••
·
....
.....
•
·•
... ···
...............
--·18
5.2
Regulating
l
ength
of
feed
dogs
.......
...
....................
...........
.
..................
19
6.
Common
troubles
and
methods
of
treatment
............
··•
............
·••
... ...
···
......
...
---19
Parts Book
1.
Accessories
of
machine
head
........................................
.
......................
22
2.
Components
of
case
...............................................................
•··
···
......
23
3.
Upper
shaft,
needle
bar
components
.........
··· ···
·••
............
···
.....................
25
4.
Presser
bar
components
......................................................
.
...........
··· 28
5.
Components
oJ
lower
shaft
and
rotary
hoolc.
:"
...
••·
..................
••·
.........
30
6.
Feedin9.
lifting
belt
components
.....
.
.....................
·.••
... ... ... ...
...
... ...
...
...
32
7.
lubricaton
components
..
.
....
..
•·••••
...
·••
.........
·-
...........................
··•
......
35
8.
011
re
servo
ir
&
!!nee
lifter
componet~ts
·-
..................
·••
..................
···
••·
... 38
9.
components
of
thread
winder,
double
1hread
bobbin
.................................
40
10.
Co
mponents
of
table
plate,
electrical
equipment
...
......................
..............
43
11.
Components
or
m
aclline
stand
........................
•••
.....
. •·•
·•· ··•
...
... ...
...
...
...
45
-3-
From the library of: Superior Sewing Machine & Supply LLC