Consew 345-3 User manual

®
CONSOLIDATED SEWING MACHINE CORP.
MODEL
345-3
345-3P
PARTS BOOK
From the library of: Superior Sewing Machine & Supply LLC

CONTENTS
(FE:ATUREs:) ..................................................................................................................... 1
(s'eECIFIC.ATIONS) ...................................................................................................... 2
( t~t:l,LE QF/$1"/l.NDAao ,GAVGE) ······ ............... ··· ..... ···· ........................... ········· ··· 2
(l~s~J;;ALLl~~) .................................................................................................................. 3
1IJ Installing the Machine Head ..· .. ·..····..·..· .. ·······..··..·....· .. ····..·..·····....· ................. · ........... · .. ·... ·........ 3
121 Installing the Treadle and Chain ......··......· ................ ·..· .......... ·....· ................................ · .. ·......·..... ~
~ Installing the Motor Pulley ·········....··.. ·..·..· .. ·..····..····..·..···......·..· .. · .. ·..·......·........·........··· .. ·...·······.. 4
[4] Belt Tension.adjustment ..· .. ······· .. · .. · .. ···········....· .. ·········· .. ·..··..···.....· ...................................... ·...... 4
151 Installing the Pulley Cover ··· .. ·· .. · .. ··········....·..·····....·......·..·..· .......... · ........ · .. ·.....· ........... ·......·....··.. 4
12] Motor and Motor Pulley ..·..···· .. ··....·..·········· .. ·..·..···· .. ·....··..· .. ··....· .. ·· ................... ·........·· .. ·..···...... 4
1Z1 Spool Stand ..··....··....····..····..· .. ····....·····..····· .. · .. ···..····..······· .. · .. ··....·..·..· .. · ......... ···........·...·....·..·... 4
.................................................................. 4
IIl Lubrication ·....·..· .. ··....·..·······..·· .. ···..·······..·..··....··....·· .. ······ .. ···· ·. ·....·· .............. ·..·......·.. ·. ·...·....·. ·. 4
121 Running In · .. ··· .. ········..··· .. · .. ·..··..······· ...... ········ .. ·....··· .. ··..··..····.....···......·........· ........... · .. ·.....· .. ·... 5
.......................................................................................... 5
IIl Needles and Threads ..................................................................................................................... 5
121 Installing the Needles ..·..···· .. · .. ··· .. ··....···..···..·..······· .. · .. · .. ···· .. ·..· .......................................... ··...·... 5
~ Upper Threading · .. · .. · .. ·..··········....·..·······..· .. ····.. ····.. · .. ·..····..···· ........................... ' ............... ·........ 6
[4] Lower Threading ........................................................................................................................ 6
151 Installing the Lap per· ....·..· .. ·· .. ·......·..·..··....·· .. ·..·· .. ········ .. ·..·· .............. ·.....··........·........·.·.·.... ·........ 7
12] Sewing ···..·..·..········ .. ·....··....·....··..· .. ····..····· .. · .. ···..·..· .. ·....··..·..··...··..· .............. · .................. ·....··.. 7
1Z1 Thread Tension ··· .. ·..···· .. ·....······..·....·..··......··..·..··..···..····..·..··....·..· ........ · .......................... ···...·..· 7
!§] Presser Foot Pressure Adjustment ................................................................................................ 8
~ Stitch Length Adjustment ·........··..·..··..·....·· .. ····..·..·.. ·..···..·· .. ·· ................................................. ··.. 8
I!Ql Puller Feed Adjustment ................................................................................. 8
.............................................................................. 10
IIl Needle and Looper Timing Adjustment .......................................................................................... 10
121 Needle Bar Height Adjustment ......··...·...· ........... ··· .. · .. ·.....·.....·...·.· .. · ................................ · ............ 10
~ Looper Timing for Avoiding Contact with Needles ........................................................................... n
[4] Needle Guard Adjustment ............................................................................................................ 11
151 Feed Dog Height Adjustment ....·..··..·..·..·····....·....···..····· ............ ·.....·..·.....·· ................. ······.. ·..··.... -12
12] Puller Height Adjustment ..·..···..·........·..··..·..· .. ·..·....··........·..·.....·.. ·..··....· .. ·.. -12
1Z1 Installing the Spacer (For the demm specifications) ........................................................................ ·--13
!§] Upper Thread Take-up Thread Guide Adjustment ....................................................................... ----13
~ Thread Release Lever Adjustment ..·..·····....· .. ········ .. ·..·········..···..·· .. · ................. ·..·......······.··....··..·13
I!Ql Thread Release Shaft Adjustment........······· .................................................................................... 14
[]] Upper Thread Nipper Adjustment ··· ............................................................................................. 14
11Z1 Lower Thread Take-up Timing Adjustment ·.....·······........······ .. · .. ·· ............ ·· ................ ··· .. ·..····..·.... -14
fil Puller Device Timing Adjustment ........................................................... 14
( TROUBLESH00TING)································································································I5
From the library of: Superior Sewing Machine & Supply LLC

*Model -345" Double Chain Stitch Feed-off-the-arm Machine is most suitable for sewing tubes of medium and heavy
materials, such as those of jackets, denim trousers, fatigue clothes and work trousers.
*Machines made to the puller and denim specifications employ a presser foot, a needle plate, and feed dogs that have steps to
prevent sewing irregularity and assure easy sewing of materials which may be different in thickness.
*Machines made to the puller and the denim specifications employ a movable needle guard which makes them ideal for sewing
heavy materials.
*Machines made to the puller and the denim specifications have independent loopers for ease of adjustment.
*Machines made to the puller specifications employ a proximity puller system which assures outstanding feeding performance
for a wide range of materials from medium heavy to heavy.
- 1 -
From the library of: Superior Sewing Machine & Supply LLC

Model
345-3
345-ZP /345<5P
34~ ~z DP/34f-3DP
Stitch pattern
3-line
2-line
3-line
2-line
3-line
parallel sewing parallel
sewing
parallel sewing
parallel sewing
parallel sewing
--
Sewing speed 3,600
spm
St itch Iength
1.4~4.2mm
2~4.2mm
No. of Needle 3 2 3 2 3
f l/g
l/g (6 .4mm)
Needle gauge
YMJG4(5.6mm)· Ys Ys<6.4mm)
}'JG(4.8mm)
%z%CB.Omm)
1,;4(6.4mm)
l/g l/g (6.4mm)
7Jz%z(8.0mm). fJGYJ6(9.6mm)
Y4 (6.4mm)
%:}'j6(9.6mm) %z%z(8
.Omm)
Needle bar stroke
33.4mm
35mm
Minimum tube size
190mm
Puller device
None
Equipped Equipped Equipped
,_
Equipped
Specification
Needle Needle Needle Presser Feed
dog
Looper
Lap per
gauge
clamp
Plate foot assembly
y64 y64 y64 y64 y64 y64 y64 y64
y64 y64
y64 y64
VJzMH
VJzH
%%
%% %%
YsYs
%% %%
Y4MH
Standard
345'·3
%H
Specification
%% %di2
%2 %2 %2%
5
42% % %z
%MH
%H
%%
%% %% %%
%%
%%
%MH
%H
--
%%
Ys%
Ys%
%%
%% %%
%XL
Denim
34S'/P
%2% %%
%2 %2 %2 %z
% %z
%2 %2
%XL
Specification
%%
%%
%% %%
%%
Jl6%
%XL
- 2 ~
From the library of: Superior Sewing Machine & Supply LLC

[l] Installing the Machine Head
1. Install pulley cover base ~ on machine bed 0 with two hexagonal bolts ~-
2. Insert bar cushions 0 into the holes in the bottom of the bed.
3. Place the machine head on the table, adjust its position in forward and backward directions by aligning it with the hole for
presser bar lifter chain 0. and in sidewise directions by aligning it with belt hole ().
4. After fastening cushions @ to the machine bed and pulley cover base with set screws (i). fix them to the table with screws 0.
[g) Installing the Treadle and Chain
1. Fasten connecting lever bearing 0 to the beam in the upper part of the table legs with nut ~-
2. Slide connecting lever L 0 onto connecting lever shaft ~. fit it to connecting lever bearing 0. and secure it with connect·
ing lever shaft collar 0.
3. Set connecting lever L 0 in line with the clutch lever hole. and tighten it with square head bolts ().
4. Hook connecting rod f) to the clutch lever and connecting lever L 0.
5. Slide another connecting lever L 0 onto connecting lever shaft ~. and fix it with square head bolts ().
6. Fasten treadle shaft (i) onto the lower beam across the table legs with hexagonal bolts @).
7. Slide pedal stopper 419 and presser foot lifter pedal (D onto treadle shaft 0. and fasten it with pedal stopper 4JY.
8. Slide treadle stopper f) and treadle ® onto treadle shaft «i}, and fasten treadle stopper fl in such a way that treadle f)
will move lightly.
9. Slide treadle· support~ onto the end of treadle shaft 0. turn it until treadle shaft 0 is parallel with the floor, and fasten it.
10. Hook one end of connecting rod f) to connecting lever L 0. and hook the other end of it to treadle f).
11. Hook one end of chain (I to the presser foot lifter lever, pass the other end through the hole in presser f~ot lifter pedal (D,
and adjust the chain length so that the pedal will be at the same height as treadle 4J).
From the library of: Superior Sewing Machine & Supply LLC

@] Installing the Motor Pullsy
With motor shaft key way 0 up, insert
key
f) into the key way, slide motor
pulley 8 onto the motor shaft, and fasten
it with
nut e.
~ Belt Tension Adjustment
Place belt 8 on machine pulley 0 and
motor pulley $. and adjust the belt ten·
sion with tension regulator e so that the
belt sags about 25 to 30 mm when it is
pressed with the thumb at the center
point between the pulleys.
[ZJ Spool Stand
~ Installing the Pulley Cover
Install pulley cover 0 on the pulley
cover
base with two set screws $.
!§] Motor and Motor Pulley
1. Use the motor specified below
Three-phase 200 V 2-pole,
400 W motor
Assemble spool stand 0 as shown below, and install it at
the right frontal corner of the table with screws.
2. Motor Pulley
Use the correct motor pulley suitable to the frequency of
your power supply
as specified below.
Frequency Sewing speed
Motor pulley Belt size
3,100 85 M-45
50Hz 3,600
95
M-46
3,100
70
M-44
60Hz
3,600
80 M-45
[I) Lubrication
Be sure to oil the following points before using your sewing machine.
l. After setting up the machine, remove adjusting cover screw 0. and pour oil in up to the reference line on oil gauge $.
2. Turn the pulley until oil cap 8 is up, remove oil cap 8 and pour oil into oil tank 0 until it is full. If the oil in the oil tank
decreases below tank center line @1 the oil will not be drawn into the upper shaft, causing imperfect lubrication. Be sure to
keep the oil in the oil tank above oil tank center line 4!).
3. Pour about 5 drops of oil weekly_ into three oil cups @, upper thread nipper tension bracket oil hole 8. and needle bar bush·
ing oil hole 0.
4. Remove oil drain screw 0 from time to time to discharge the used oil which has collected in the front bed oil sump.
5. Wipe arm jaw 4@ and rear bed oil sump 4D from time to time to remove oil from them.
*Use white spindle oil.
- 4-
From the library of: Superior Sewing Machine & Supply LLC

i~) Running In
1_ i'dotor :<\\·itdi en. clcpre:os tlw treadle, and make sure
that the [Hille,- runs in the arrow direction.
If the pulley runs in the opposite direction. remove the
piLI>~- ;uHi H'CO!liH·ci two of the three \\·ires (but nut the
earth wire) of the :l phase cord.
'' To run in your machine. operate it at about 3.100 sprn
for tlw first 3 or 4 clays.
[IJ Needles and Threads
The needle and threads to be used vary depending on sew-
ing conditions. Select the correct ones by referring to the
table below.
Needle
Thread
Upper thread
lower thread
:lJ: 16
j:j:50
Cotton
+1:60
i
:It 19
Cotton j:j: 30
Cotton
rt 50
:
c-~-
::t22 Cotton
:!i:20
Cotton
+t30
s -
LZl Installing the Needles
0-----
e-------
~----
l. Turn the pulley until needle holder 0 is raised to the
highest position.
2. Loosen needle set screws @, hold needles 8 with their
long grooved side facing front, insert them into needle
holder 0 all the way, and fasten the needle with needlP
set screws @.
From the library of: Superior Sewing Machine & Supply LLC

[aJ Upper Threading
~ Lower Threading"'
6 -
From the library of: Superior Sewing Machine & Supply LLC

Installing the Lapper
'
!
)
,r---- Presser foot
.-·--- Lapper
;{-/----~~~- · .--·--Oblong groove
=::::!Ji --~~0 J J- __ /
=----'=jK~;==== ~~~,_ =----
Ill
'" '
" , '· · Lapper guide plate
_____ .!) ···,<·· ... _____ Bring it into full contact
rf1} · . Needle plate
Insert the hlpper guide plate into the oblong groo\'e Ill the forward feed arm, and fit the lapper into place in such a way thaL
its tip will not touch the pre~ser foot.
i<C If the lapper is too hard to move. or fails to reach the correct position. loosen set sere\\' 0 slightly and adjust the lapper
position.
IQ] Sewing
1. Switch the power on, step down on presser foot lifter
pedal 0. place a fabric under the presser foot, and release
presser foot lifter peda I 0.
2. Depress treadle 8 to start the machine.
3. After sewing the work, keep sewing until it reaches thread
cutter~- and then cut the threads with thread cutter ~-
CZl Thread Tension
Thread tension differs with sewing conditions. Adjust it to suit your particular sewing conditions.
r -.. _
Less
------------------
(-~~----
Less tension i!l. More tension
'"""'----~ --- ----
1
Go~
Lower thread
Loose. bad stitches
Lower thread Upper thread
1. Adjust the upper thread tension properly by turning upper thread adjusting screw 0.
2. Adjust the lo'A·er thread tensiop properly by turning lo\ver thread adjusting screw f).
7
From the library of: Superior Sewing Machine & Supply LLC

raJ Presser Foot Pressure Adjustment
Adjust the presser foot pressure by turning wing nut 0
to such a level that it is just enough to keep the work
from slipping.
*In case of Model , the puller pressure can
be adjusted as appropriate to the work by loosening
adjusting thumbscrew nut f) and turning presser ad-
justing screw @
~ Stitch length Adjustment
l. Remove adjusting cap screw 0.
·> Turn the pulley toward yourself until set screw f) comes to the
position of the adjusting cap screw hole.
3.
Loosen set screw f) with a screwdriver. turn the pulley again
by about one-quarter of a turn in the same direction to bring
horizontal eccentric adjusting screw ~ to the position of the
adjusting cap screw hole.
4. Stitch length will decrease when horizontal eccentric adjusting
screw~ is turned clockwise with the screwdriver. and increase
when it is turned counter-clockwise.
5. After the adjustment. tighten set scncw @ securely.
*In case of Model , readjust the needle guard after
adjusting the stitch pitch. In case of Model -7 A and -8/\, read-
just the needle guard and puller feed.
:IQ] Puller Feed Adjustment
1. After adjusting the STITCH LENGTH, you have to
readjust the PULLER FEED again.
2. Loosen the nut. 0, you can get more feed toward
outside, get less toward inside.
3. After adjusting, tighten the nut 0.
- 8
Less tension
L . 0 -
-- . ---:::::>More tension
ess tens10n =X'~
:-- rf··~l·or.ete~: ~- ..
--,1 iL , -·
,- ~-------
/! ' ~
.. r
J
From the library of: Superior Sewing Machine & Supply LLC

*The table below shows samples of stitches made with a highly elastic fabric and a fabric which is not so elastic.
Adjust the puller feed by referring to this table.
Puller feed Fabric with high elasticity
Fabric with low elasticity
Correct
Neither non-alignment
nor sewing wrinkles.
Neither non-alignment nor sewing wrinkles.
Insufficient
Non-aligned, and wrinkled. Non-aligned,
and wrinkled.
Excessive
Non-aligned,
and very wavy. Non-aligned,
and very wavy.
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I]] Needle and looper Timing Adjustment
(
,
. > :r / ,
/_,.jf..--;:/1 ' ' /
Model s4<;.- 3 2-3 5 mm j~)
1
Model ~
4
S/f' 3.0-3.2 mm ;Jr /
Model 34f·3
Make an adjustment so that, when needles 0 come down to the lowest position. loopers f) will be at the end of their backward
travel and that the distance between the centers of the needles and the tips of the loopers will be somewhere from 3.2 to 3.5 mm.
Model 3A'S'"/ P
Make an adjustment so that, when needles 0 come down to the lowest position,
loopers @ will be at the end of their backward travel and that the distance
between the centers of the needles and the tips of the loopers will be somewhere
from 3.0 to 3.2 mm.
{Adjusting Method}
1. Remove the presser foot, needle plate and feed dogs.
2. Loosen two set screws 0 and cap screw 0 on lower belt wheel @.
3. Turn the pulley toward yourself until needles 0 come down to the lowest posi·
tion.
4. Turn the lower-shaft until loopers f) reach the end of their backward travel.
5. Tighten cap screw 0 and two set screws 0 securely .
. 6. Loosen set screw (i), move looper holder 0 in the arrow direction until the
distance between the needle center and the looper tip is 3.2 to 3.5 mm. and
retighten set screw 0 securely.
*In case of machines made to the denim specifications, the individual loopers
must be adjusted because they are independent of one another.
[2] Needle Bar Height Adjustment
Looper forward travel Looper backward travel
The looper of standard specification
The looper
of denim specification
Adjust the needle bar height so that the looper thread eyes will match the needle eyes in the forward and backward travels of
the loopers.
(Adjusting Method)
1. Turn the pulley toward yourself until the loopers move forward from the rightmost position to a point where the looper
thread eyes are in line with the needles eyes.
2. Open face plate O. loosen needle bar clamp screw @, and move needle bar 8 up or down until the looper thread eyes are
in line with the needle eyes.
3. Retighten needle bar clamp screw f) securely.
4. After the adjustment, turn the pulley toward yourself and make sure that the looper thread eyes match the needle eyes in the
forward and backward travels of the loopers.
- 10 -·
From the library of: Superior Sewing Machine & Supply LLC

l:2l LVUJJtH •unutg tor M.vommg \..onl:aci wnn Neea~es
0.2mm
Push needle '
~r
Nee~dle ®
0-0.05mm
Model 34-S'
Model 345'-;3
locus of looper
0.2-0.3mm
Model, M'S'/ P
Make an adjustment so that there will be a clearance of 0 to 0.05 mm between the needles and the loopers in the forward and
backward movemt>nts of the loopers.
Model 345'/P
In the forward movement of the loopers, push needles by loopers by 0.2 mm. In the backward movement of the loopers, adjust
that the clearance between the loopers and the needles will be 0.2 to 0.3 mm.
{Adjusting Method)
l. Remove forward feed arm cover O. and turn the pulley toward yourself until the longitudinal eccentric wheel stop screw
shows itself at adjusting hole f).
2. Loosen the longitudinal eccentric wheel stop screw until it hardly comes out of the surface of the wheel. turn the pulley again
toward yourself. and loosen the other stop screw.
3. With the screwdriver holding the stop screw. turn the pulley to adjust the clearance between the needles and the loopers.
4. After the adjustment. retighten the two stop screws and the forward feed arm cover screw.
14] Needle Guard Adjustment
Model 347-3
Make an adjustment so that, when the loopers meet the needles in their forward movement, there will be a clearance of 0.1 to
0.2 mm between the needles and the needle guard.
(Adjusting Method)
l. Turn the pulley toward yourself until the needles come down to the lowest position.
2. Loosen stop screw 0 from the underside of the tip of the forward feed arm.
3. Adjust the clearance between needles f) and needles guard 8 to somewhere from 0.1 to 0.2 mm by moving needle guard 8
4. After the adjustment, retighten stop screw 0 securely.
-11
From the library of: Superior Sewing Machine & Supply LLC

Model .:4 5'/f'
~--~---------------------
The clearance between the needles and the tips of the
loopers will be '0.05 mm, pushing the needles by needle
guard 0.
(Adjusting Method)
1. Turn the pulley toward yourself until the needles
come down to the lowest position.
2. Loosen stop screw 0. and raise or lower needle guard
0 so that the bottom ends of the needle eyes will be
about 0.5 mm above the bottom of needle guard 0.
3. Turn the pulley toward yourself again until the tips
of the loopers come to the centers of the needles.
4. Loosen stop screw 0. move needle guard 0 to the
left or to the right, and adjust so that the clearance
between the needles and the tips of the loopers will
be 0.05 mm, pushing needle points by needle guard 0.
At this time, please make sure that the clearance
between the loopers and the needles is 0.2·-0.3 mm
in the backward movement of the loopers.
~ Feed Dog Height Adjustment
Model 34'S- 3
Make an adjustment so that, when feed dog 0 is at the highest
position,
the feed dog will be 0.8 mm above the top surface of the
needle plate.
Model .;45"/P
Make an adjustment so that the highest part of the feed dog will
be
1.2 nun above the top surface of the needle plate.
{Adjusting Method)
Adjusting the feed dog height by turning feed base eccentric shaft
f).
!§] Puller Height Adjustment
Adjust the height of puller 0 so that it is 0.1 to 0.2 mm high from
the top of the needle plate.
(Adjusting Method}
Loosen set screw f), and move puller support @ up or down until
puller 0 is
0.1 to 0.2 mm above the top of the needle plate.
-· 12-
~+2mm
0.05 mm-·-t-t+-f--0.2 -0.3 mm
-f)
____ j
From the library of: Superior Sewing Machine & Supply LLC

[Z] Installing the Spacer
(For the denim specifications)
If stitch irregularities develop in sewing very heavy materi-
als, adjust the sub-feed dog to the correct height by spacer_
(Adjusting Method)
1. Remove set screw 0 and sub-feed dog f).
2. Placer spacer ~ under sub-feed dog f) and retighten set
screw 0-
* The spacer is in the parts box.
~ Thread Release lever Adjustment
!a] Upper Thread Take-up Thread Guide
Adjustment
-- '--y;:-;_~~Thread
-f) " ( -Jt il guide
Upper thread W
take-up
Model ~4s-~
Model 34S- 3
Model Yi.S(f
Make an adjustment so that, when the needle bar is down at
the lowest position, the top of the upper thread take-up
thread hole meets the bottom of the thread guide.
Model 34S/P
Please adjust the distance between the center of the upper
thread take-up and the top of the
thread guide will be
7-8mm.
(Adjusting Method)
l. Turn the pulley toward yourself until the needle bar is
down
at the lowest position.
2. Loosen set screw O. and move upper thread take-up
thread guide 8 up or down until its bottom meets the
top of the upper
thread take-up 'thread hole.
*The higher the upper thread take-up thread guide$, the
greater will be the upper thread loops.
Make an adjustment so that, when the needle bar is down at the lowest position, the thread release lever thread hole meets
the thread hole in upper
thread tension bracket ~-
(Adjusting Method)
1. Turn the pulley until the needle bar is down at the lowest position.
2. Loosen set screw 0. and raise or lower thread release lever 8 until its thread hole meets the thread hole in upper thread
tension bracket ~-
*The higher the thread release lever, the tighter will be the stitches.
- 13-
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llQI Thread Release Shaft Adjustment
Make an adjustment so that the thread tension discs will
loosen when
the presser foot is raised, and tighten when the
presser foot is lowered.
{Adjusting Method)
1. Loosen stop screw 0.
2. Make an adjustment by turning thread release shaft f)
so that the thread tension discs will begin to loosen when
the presser foot is raised 4 mm above the top surface of
the needle plate.
3. After the adjustment, retighten stop screw 0 securely.
jgJ lower Thread Take-up Timing Adjustment
Make an adjustment so that, when the loopers begin to
move backward, lower thread take-up 0 will rise about 5
to 7 mm above lower thread take-up bracket f).
{Adjusting Method)
1. Insert a screwdriver into the adjusting hole in the bed,
and loosen two stop screws$.
2. Raise lower thread take-up 0 5 to 7 mm above thread
take-up bracket f).
3. After the adjustment, retighten two stop screw $.
~ Puller Device Timing Adjustment
1. With 3mm wrench to loosen the screw 0 & ~
2. The timing of the feed will be starting when the
needle is away from the needle plate about 5 or
6mm, and stoping at lOmm.
3. After adjusting the timing, retighten the screw
0 & ~.
[j] Upper Thread Nippf:}r Adjustment
Adjust the clearance between the upper thread nipper ten-
sion bracket and tension plates to somewhere between
0.8 mm and I .0 mm.
(Adjusting Method}
1. Loosen stop screw 0. and move upper thread.nipper ten-
sion bracket f) in or out until the clearance between it
and tension plates $
is somewhere from 0.8 to 1.0 mm.
*iStitch tightness can be improved by narrowing the clear-
- 14 -
ance between upper thread nipper tension bracket 8 and
the arm.
From the library of: Superior Sewing Machine & Supply LLC

Trouble
Thread breaks.
Needles break.
·-------------'
Stitches skip.
Upper threads loose.
Needles damaged.
Needles hit loopers.
Needles hit needles guard.
Looper points
are dull.
Needle and looper timing
Clearance between needles
and loopers too
great.
Lower thread take-up
timing wrong.
Upper thread nipper does
not tighten upper threads.
Inspection
Lower thread tension.
Thread release lever
position.
Needle size and
thread
count.
Clearance between needles
and loopers.
---------'
Direction of long groove.
Clearance between needles
and needles guard.
Needle size and
thread
count.
Direction of long groove.
Needle and looper timing.
Clearance between needles
and loopers.
Lower
thread take-up
timing.
Upper thread tension.
Lower
thread tension.
Tension plate clearance.
- 15-
Remedy
Refer to instructions for
needle installing.
_ ____,_____! ~
-~-~J
Adjust looper timing to
avoid contact with needles.
Refer to instructions for
needle installing.
Adjust needles guard.
Refer
to the section on
"Needle~ and Threads".
Refer to instructions for
needle installing.
Adjust upper
thread nipper.
From the library of: Superior Sewing Machine & Supply LLC

Trouble
!Machine does not feed
~rk.
Non-alignment and
wrinkles
(Model-: ~4S"'- -5
Non-alignment and
wrinkles
1Modei-~$4VP
Remedy
dog height. dog height.
Pre~ser'foot pre~:ure. [_\AdJust presser foot l S \
_f ~sure. ______ __:'_J
Feed dog worn out.
Presser foot floats and doeSll------
not fully press work. _j
I Feed dog and presser foot 1-------'---------------ll Have serviceman check
work on one side only. them.
L--------~-~
Sub feed dog height
incorrect.
Feed
dog height incorrect.
~ullertimingw __ r_on_g_. __ ~
Sub feed dog height. Adjust sub feed dog height.
Adjust presser foot
pressure.
-------~--{ Ajust feed dog height. 12 I
l...---------~ust P~_device timing., 14 I
- 16-
-----t--{Adjust puller feed. 8
foot pressure. Adjust
presser
pressure.
}--~ Adjust feed dog height.
12
From the library of: Superior Sewing Machine & Supply LLC

CONTENTS
1. CO- MACHINE BODY
2. Cl- UPPER SHAFT MACHANISM
3. C2- NEEDLE BARMECHANISM
-FEED MECHANISM
4.
C3= PULLY MECHANISM
5. C4- PRESSER BAR MECHANISM
6. C5- LOOPER MECHANISM cr.
7. C6- UPPER THREADING MECHANISM
8. C7 ... LOWER THREADING MECHANISM
9. C8- LOWER SHAFT MECHANISM
-GAUGE PARTS
10 C9- GAUGE PARTS( F)
11. CIO- GAUGE PARTS(DP)
12. Cll- PULLER DEVICE MECHANISM
13. C12- ACCESSORIES
From the library of: Superior Sewing Machine & Supply LLC

11
-~ 15
-~ I
---~
~
I
10
12
4
I
I
L,~
C0-2
co
From the library of: Superior Sewing Machine & Supply LLC