
CONTENTS
DISASSEMBLY
FOR
MACHINE
TRANSPORTATION
OJ
Feed Guide Mechanism and
Cover Removal . . . . . . . . . . . . . . . . . . . . . . 2
[I]
Rail-Y Cover
and
DO
Motor
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
[]] Machine Head Removal . . . . . . . . . . . . . . 6
STITCH
LENGTH
AND
MACHINE
SPEED
9
LOWER
THREAD
CAPACITY
AND
BOBBIN
REPLACEMENT
FREQUENCY
9
~
MECHANICAL
DESCRIPTIONS
~
10
OJ
Needle Bar. Thread Take-up lever,
Lower Shaft
and
Ro
tar
y Hook
Mechanism
.......
..
................
. 10
[I]
Work
Clamp
Mechanism . . . . . . . . . . . . . II
[]] Feed Mechanism . . . . . . . . . . . . . . . . . . . . . 12
m
[[]
lil
m
[]]
!Il
Feed Guide Mechanism
.........
.
.....
13
Thread Trimming Mechanism
.......
. . 14
Thread Catcher M
ec
hanism
....
..
.....
16
Bottom Plunger Mechanism .
..........
IS
Bobbin Winder Mechanism
...........
IS
ecdle Bar Descent
Guard
and
Needle Cooler
...................
....
19
MACHINE
HEAD
DISASSEM-
BLY
PROCEDURES
20
OJ
Bottom Plung
er
Assembly
.............
20
[I]
Thread
Trimmer
.......
..
....
.
.......
20
[]]
Thr
ead
Catcher
.....
.
............
.
...
21
IT]
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
[[]
Rotary
Hook .
......
..
...............
22
[I]
Stepping Foot
.......................
22
[I]
Needle
Ba
r. Thread
Take-up
...
.
.......
23
[I]
Needle Bar Descent Guard Assembly .
..
23
[
MACHINE
HEAD
ASSEMBLY
J
PROCEDURES
_ .
~
OJ
Needle Bar.
Thr
ead
Take
-up
.........
. .
24
[I]
Stepping
Foot
......................
. 25
OJ
Rotary Hook
...............
.
....
.. ..
25
IT]
Thread Catcher Mechanism
...........
27
[}]
Thread Trimming
Me
chanism .
.....
.
..
2S
[I]
Bottom Plunger Assembly . .
....
..
.....
29
[I]
Cylinders
...
........................
29
[I]
Needle Bar Descent Guard Assembly
31
~
STANDARD
ADJUSTMENTS
l ·
32
OJ
Adjustment
of
the
Rotar
y Hook
.......
32
[I]
Adjustment
of
the
1'\ccd
lc
Bar Height
..
.
.12
[]] Adjustment
of
the Clearance between
the Needle
and
the Ro
tar
y Hook
......
.
32
IT]
Adjustment
of
the Presser
Foot
...
.
....
33
[[] Air Pressure Adjustment
...
..
.........
34
[I]
Work Clamp Adjustment .
............
34
[I]
Work Clamp Position Adjustment
.....
.14
[]]
Mo
vable Knife Adjustment
.....
.
......
35
!Il
Thread Trimming Slider Adjustment
...
35
[I£]
Thread Catcher S
lid
er Adjustment
.....
36
(DJ
Bottom Plun
ger
Adjustment
...........
.16
@]
Thr
ead Trimming Cylinder Speed
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . .
37
[ill Thread Catcher Cylinder Adjustment
...
37
[ill Bottom Cylinder Speed Adjustment . . . .
.IX
[ill Work Clamp Cylinder Speed
Adjustment
........
...
..
............
3X
[ill Presser Foot Lift
er
Cylinder Speed
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . .
39
[ill Movable Knife Timing Adjustment
....
.
39
[ill Origin Position Adjustment . . . . . . . . . . . 42
[ill Ovcrlimit Switch Adjustment
..........
43
~
Pulse
Motor
Backlash Adjustment ...
..
44
[ill Belt Tension Adjustment
............
..
45
0]
Encoder (Position Detector)
Adjustment . .
.......................
46
[Til
Direct Drive
Motor
Maintenance
Inspection
......
..
........
.
.....
.
....
4S
[E)
Bobbin
Wi
n
der
Adjus
tm
ent
...
.
.......
4S
From the library of: Superior Sewing Machine & Supply LLC