8E240430tsoA No.

04
Congratulations on' your purchase of JUKI
MODELMO.24O4 MO-2400 Seriesmachines.
l . N E E D L EO V E R E D G E R Pleaseread this Instruction Book carefully before
using these units in order to get the most out of
MODELMO-241 4 them and to enjoy using them for a long time.
2.NEEDLO
E VEREDGER [For ttre first one month or so, operate the I
lmachine at about 80% speed of its max. I
MODELMO -241 6 [sewing speed. J
S A F E T YS T I T C H E R

InsrnucTtoN
B E F O R EOPE R ATION
fromtoP)
oir sause

sz
A"iewed

f&
Cloth plate cover

2. lf the red color is'not seen when you look down or

1. Do not hold the cloth plate cover when carrying the sidewardat the oil gauge,supply oil in accordancewith
machine. "6. Lubrication".

Runningdirection

4. The correct machinerunningdirection

is suchthat the handwheelturns clock-
3. Apply two or three drops of oil to the needlebar guide and upper wise as viewed from the handwheel's
looper guide when operatingthe machinefor the first time after setup side. Never run the machine in the
or after a long period of disuse. reversedirection.

C A U T I O N S I N OPE R ATION

1. Do not put your hand under the 2. Do not put your hand into the 3. Be sure to turn off the power
needle whijn you turn on the face plate section while the switch before you remove the V
power switch. machineis running. belt.

4. Neverbringyour fingersor hair closeto, or placeanything 5. lf your machineis providedwith a belt cover,fingerguard
on the handwheel,V-belt, bobbin winder wheelor motor and eye guard,neveroperateyour machinewith any of
duringoperation.lt may leadto seriouspersonalinjuries. them removed.

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 * Semi-sunken
type * Fully-sunken
type
s
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r.->:

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I Attach blo*'er case @ , rubber cushion @ . rubber 1 . A t t a c h f r a m e s u p p o r t p l a t e j o i n t € ) , b l u . r r ' e .c a s e € ) . r u -

cushionseat @ , nut €) , case presser plate @. bber cushronO.rubber cushionseat O. case presser
and case sponge @ to frame support plate Q . p l a t e @ , a n d c a s e s p , , n g e@ t o f r a m e s u p p o r t p l a t e ( D .

Table

Install frame support plate Q so that the cloth plate

2. Install frame support plate O directly to the table is 5 mm higher than the surfaceof the machine table.

3. Install upper waste chute @ to the left on the table,

and then attach lower waste chute @ to the upper
waste chute.
The installation of the chutes can be adiusted within
a length of 56 mm. 3. Attach wastechute @ to frame support plate O

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 50 Hz 60 Hz l Use a 400W (1/2 tP) clutch
Sewing speed
motor.
Motor pulley V belt (inch) Motor pulley (V belt (inch)
(s.p.m.)
Outerdia. 2. UseaMtypeVbelt.
Semi-sunken Fully-sunken Outer dia.
(mm) (mm) Semi-sunken Fully-sunken 3. The table on the left shows
type type type type the sewing speeds obtained
6500 r 20.5 38 32 t00.5 36 32 by the use of motor pulleys
6000 110.s with different diameters and
36 32 95.5 35 30 V belts with different lengths.
5500 r00.5 Jt) )z 85.5 J5 30 4. Note that the effective dia-
s000 90.5 35 30 80.s 5.1 30 meter of the machine head
pulley has been changed to
4500 85.s 35 30 70.5 34 30 50 mm.

t rHEBELr 4. I NSTA LLI NG T HE PEDALS

651t3"'NG

l. Install starting pedal Q on the left and presserlifter pedal O on

Install belt cover Q to the machine head.
the right as seen from the operator.
2. Use an S-shapedhook O to connect the chain @ of the presser
lifter pedal to presserlifting lever @ .

5 . SE TT IN G U P TH E T H R EAD ST AND
S t a n d a r dt h r e a d s o o o l Assemble the thread stand
components as illustrated and
set it up on the machine table
(The figure on the left shows
an assembled 5-thread stand
for Model MO-2416.)

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 l. Remove oil cap () . * Lubricatingthe needlecolor
2 . Pour JUKI New Defrix Oil No.2 into the oil reservoir. l . O p e n l o o p e r c o v e r O , t l t t t h e n e e d l ec o o l e r w i t h
3 . Stop supplying the oil when the red color has fully spreadas you silicone oil through 6 , using the furnished oil
look down at oil gauge @ or when the red color has reachedthe feeder.
red line as you look sidewardsat the oil gauge. 2. Infiltrate silicone orl also into the oil fett if the
Remove oil drain cap @ when drawing the oil reservou. machine is started immediately after lubricating the
n e e d l ec o o l e r .

7 . OPENI NG/CLOSI NG THE COVER

* Cloth plate cover
To open cloth plate cover O , push down
cloth plate opening lever O To close the
cover, push it in the arrowed direction.
* Looper cover
To open looper cover @ , move the looper
cover in the arrowed direction until it will go
back no farther, then bring it down.
Raisethe looper cover when closing it.
* Chip guard cover(upper)
I f t h e c h i pg u a r dc o v e ro f t e ni n t e r f e r e sw i t h t h e
u p p e rl o o p e ri.n s t a l l c h i p g u a r r lc o v e t 'u p p e )r @ .
(Caution)
For a fully-sunken table type, make sure to
lower waste chute opening @ before opening
the looper cover.

8 . A TT ACHIN GA N E ED L E
The standard needle is DC x 27 #1 1. A needle of DC x I can be also used, but it sometimesrequiresadjustment of the clearance
between the looper and needle.
It is advisableto use a needle of DC x2'7 for strict stitch performance.
1. Bring needle clamp O to the highest position.
2. Loosen needle clamp screw @ , and fully insert the needle into the needle clamp hole with the needle recessfacing backwards
as viewed from the operator's side.
3. Tighten the needle clamp screw.

MO-2404 MO-24t 4 MO-24 | 6

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 9. T H R E ADIN GTH E M AC HINE
Thread the machine according to the threading chart given below. (The same chdrt is on the inside of the looper cover.)

MO-2404 MO-24t 4

Lnri-z414:l

ffi:
(,trru+)
W/

MO-24 | 6

Important :
Be sure to pass the double-chain stitch needle
thread through the needle thread take-up.
(The outer thread is the overlck needle thread.)

I n t e r m e d i a t et h r e a d g u i d e
(Gautionl
When using an untwisted thread such
as wooly nylon threador weak thread,
do not wind it round the intermediate
threadguide.

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 Using the thread tension nut, adjust to an optimum thread tension accordingto your sewing conditions such as type of materials,
type and size of thread, etc.
MO-2404 MO-2414 MO-24 t6

MO-2404 MO-24 t4.MO-24tb MO-24 t6

11 . P R ESS ERFOO T t t. rHEsilrcH

PRESSURE AND LIFTER fro*r3f,IrNG

Adjust the pressure of the presser foot by turning 1. Slowly turn the handwheel as you keep depressingpushbutton O ,
presserfoot adjust screw O . When the adjust screw and you will find a point at which the pushbutton goesin farther.
is turned clockwise, the pressureincreases,while the 2. With the above condition maintained, align a desired dial on the
pressuredecreaseswhen the screw is turned counter- handwheel with white mark O on the belt cover.
clockwise. 3. Resetthe pushbutton after setting the dial.
When you turn presserfoot assembly O side-ways,
bring down presser lifting lever @ . Whenever the
presser foot is returned to its original position, be
sure to bring up the presserlifting lever.

1 3 . D I FF ERE N TIALFEE D ME CHA NISM

l. Loosen differential feed lock nut O . Turn lever O up for
stretching stitch or down for gatheringstitch.
2. Position "S" is for stretching stitch of a ratio of l:0.7 and
position "0" provides a differential feed rrtio of 1:1.
3. Gathering stitch can be made up to a differential feed ratio of
1 : 2 ( p o s s i b l eu p t o l : 4 b y a d j u s t i n gt h e i n t e r n a l m e c h a n i s m ) .
The divisionsbevond "0" mav be used as a measure.

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 When the needle bar is at the highest point of its stroke, the pointed end of the overedgingneedle should be l0 mm above the
throat olate surface.

MO-2404 M O - 2 41 4 til|
( S t a n o a rtoe f ts e t t i n s )
] \/\/ I

10mm
Throat plate Throat plate

1 5 . S ET TI N G T HE L OOPE R S
* Lower looper
Go back farthest
It-
tl o l. When lower looper Q has gone back
\1 0.05- 0.1mm
farthest, it should be distanced 3.7 to
4.3 mm from overedgingneedle O .
1J.t -4 3mm
--\-, rl 2. When the lower looper is crossedwith the

\\\r-u needle, the clearancebetween them should

be 0.05to 0.1 mm.

"lm\
ry/'
3. To make adjustment, loosen setscrew O
and move lower looper holder O .

* Upper looper
MO-2404 _ 1. When upper looper @ has advancedfarthest, it should be distanced
MO_2416 r u . / - 1 1 . 3m m
1 0 . 4 t o 1 1 . 0 m m f r o m t h e o v e r e d g i n gn e e d l e f o r M O - 2 4 1 4 , a n d
MO-2414 - 1 0 . 4 - 1 1 . 0m m 1 0 . 7 t o 1 1. 3 m m f o r M O - 2 4 0 4 a n d M O - 2 4 1 6 .
2. The clearancebetween upper looper O and lower looper O when
they are crossedeach other should be 0.05 to 0.2 mm.
3. To make adjustment, loosen setscrew @ and move the upper
looper.
* Use a proper upper looper according to the count of the needle used
in accordance with the table shown below. When placing orders,
specify the bracketed numbers[--l.

Numerals engravedon
Model Count of Needle
upper looper

88@ #8 - #13 (#14)

0 . 0 5- 0 . 2 m m
1-Needle Overedger
Safety Stitcher 88m #14 - #20 (#13)
I 888
I 888 #6 - #8 (#9\
2-Needle Overedger
88 l8al #9- #16
* Avoid usingneedles
with the bracketedcountsas muchas possible.

* Double-chainlooper
Go back farthest
1 When double-chain looper O has gone
lio 0.05 - 0.1 mm
--\+r\\
back farthest, it should be distance l 8 to
t/ \\\----o
2 mm from double-chainneedle @ .
2 . The clearance between the double-chain
-]._1.8-2mm

"-A
looper and needle should be 0.05 to
0.1 mm when they are crossedeach other.
To perform the adjustment, loosen set-

ry screw (E and move double-chain looper

holder O .

L
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 * Contact of the presserfoot with the throat plate
top surface
Usirrg adjust screw @ , perform adjustment so that the sole of
the presserfoot evenly comes in contact with the top surface
of the throat plate when presserfoot O comes down.

0 . 8m m O.5mm
Front up

|?).*=il)1
o
i I hroat
plate

* Height of feed dog * Inclinationof feeddog

1. Feed dog O is usually set so that its teeth protrude about 1. Loosen screw O , and turn eccentric shaft O in the
0.8 mm from the throat plate surfaceat the highest point in arrowed direction to make the feed dog front up or turn it
its trajectory. Increase the protrusion for heavy-weight in the reversedirection to set the feed dog front down.
materialsor reduce it for light-weight materials. 2. The feed dog should be levelled when the dot engravedon
2. Use setscrew O to adjust the protrusion of the feed dog the eccentric shaft faces exactlv to the ieft.
teeth.
3. Using setscrew O , make adjustment so that differential
feed dog @ is level with the main feed dog.
4. Adjust the height of auxiliary feed dog O by setscrew @
so that it is 0.5 mm lower than the main feed doe.

1 7 . C H AI N LOO PERT H R EAD CAM (MO -2416)

Loosen setscrew@ , and adjust chain looper thread cam O so
that 6 of the chain looper thread cam meets the bottom of
looper thread cam pawl O when the needle is at its highest
position. Make sure that the chain looper thread cam releases
the looper thread at the moment the needlepoint starts to go
below the bottom of the throat plate under this condition.

'"'""Kf* . | | Overedge

18 . T HR EA D GU ID E AN D LOOPERT HREAD TAKE .UP

The table below shows the standard demensionsof the individ-
ual thread guides and looper thread take-ups when the upper
looper has gone back farthest.
MO-2404 MO-2414 MO-2405
MO-2416 (Hemming MO-2404
3ode (Standard) (Standard) bottom)- (Soft chain)

Throat
G w G w G w G w
plate 74 79.5
B 74 79

l C
D
22.5
6 3. 5
E 40.5
F 26
C 3 7. 5 45 45 3 7. 5 45 4l 7
H t2 I J 18.5 9.5 t2 l3 26.5
6.5 24.5 3 3 .5 2E.0 33.5
J 23 I
K
L 74
M 63
G : General thread W : Wooly thread (Unit : mm)
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 * Heightof the lower knife
Loosen setscrew €) and adjust the height of lower knife O so
that its edge is flush with the throat plate surface.
* Heightof the upper knife
Loosen setscrewsO , O and perform adjustment so that upper
k n i f e @ o v e r l a p sl o w e r k n i f e O b y 0 . 5 t o I m m w h e n t h e
upper knife is at its lowert point.
* Overedgewidth
Overedgewidths of 1.6 thrqugh 6.4 mm are provided by
changing the parts or by using subclassmodels. (The overedge
width will be slightly larger than the knife cut width.)
T o c h a n g et h e o v e r e d g ew i d t h l
l. Loosening setscrew@ , push lower knife O to the left and
fix it.
2. Loosen setscrew @ and move upper knife @ as required,
then fix it.
3. Lower the upper knife to its lowest point and loosen set-
screw @ . Tighten setscrew@ when the lower knife comes
in contact with the upper knife.
(Caution) Be sure to tighten screw G) before operating
machine.

* Resharpening
the lower knife
When the lower knife has become dull, resharpenit as shown
in the figure left.

2 0. N E E DL EG UA R D
* For 1-Needleand 2-NeedleOveredgers
An overedgeris equipped with two needle guards O and O .
1 . Position needle guard O so that it lightly comes in contact
with needle O when the blade point of lower looper O has
reachedthe center of needle O .
2. Position needle guard O so that it is 1 mm lower than the
bottom surface of the throat piate end is distanced0.1 mm
from needle O when the needleis at its lowest point.

* For safety stitchers

A safety stitcher has four needleguards O , O , @ and O .
1. Position needle guards tl) and O in the same manner as the
i overedgerexplained above.
2. Position needle guard O so that it lightly comes in contact
with needle O , and position needle guard @ so that it is
distanced 0.1 mm from needle@ when the needle is at its
iowest point.

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 S T I T C HF A I L U R E CAUSES MEASURES
CORRECTIVE
( l ) N e e d l et y p e l s w r o n g . o Use a specified needle.
1. Needlebreaking (2) Needlecount is not correct. o Use a needle size suitable to the thread gauge
and type of fabrics.
(3) Needle is not installed correctly. o Install the needle in the correct way (See 8).
(4) Needle is not straight. o Use a straight needle.
(5) Needle-to-needleguard is inadequate. o Correct the relation (See 20).
(6) Needle-to-looperrelation is inadequate. o C o r r e c tt h e n e e d l et o l o o p e r r e l a t i o n ( S e e1 5 ) .
( I ) Position of the upper and lower knife is o Adjust the knife position ( See 19).
2. Cloth is not cut
inadequate.
(2) Knife blade has worn out. o Sharpen the lower knife or renew the upper
knife.

3. Stitch skipping ( l ) Needle-to-looper relation is wrong. o Correct the needle-toJooperrelation (See 15).
( 2 ) Looper blade is blunt. o Correct the shapeof the looper blade using
an oilstone, or replaceit.
( 3 ) Needle is threaded with S-twist (or left- o Use a Z-twist (or right-hand twist) thread with
hand twist) thread. the needle.
( 4 ) Thread tension is wrong. o Adjust the t\read tension (See l0).
( s )Double chain looper thread tension is not o Correct the position of the chain looper threac
enough. c a m( S e e l 7 ) .

4. Thread breaking ( 1) Quality of the thread is poor. o Use a thread of good quality.
(2) Thread is too thick for the needle size. o Selecta suitable needle or thread.
(3) Needle is installed in a wrong way. o Install the needle correctly (See 8).
(4) Thread tension is too high. o Adjust the thread tension (See 10).
(5) There is a scratch or bruise on the surface o Remove scratchesand bruisesusing an oil-
of needle,looper, throat plate or needle stone or buffing machine.
suard.

5. Double chain-off ( I ) Presserfoot does not evenly act on the feed o Correct the relation of the presserfoot with
thread stitching dog. the feed dog.(See I 6).
are not correct. (2) Rear presseris shaking. o Adjust the rear presser.for smooth and
(MO-2416) steady motion.
(3) Needle thread and looper thread tensions o A d j u s t t h e t h r e a d t e n s i o n( S e e l 0 ) .
are not correct.
(4) Double chain looper is installed in a wrong o Correct the double chain looper (see I 5).
wav

6. Puckering ( I ) Needle is too thick. o Selecta suitable needle size for the thread
and materials.
(2) Tiread tension is too high. o Adjust the thread tension.
(3) Pressureapplied by the presserfoot is too o Correct the presserfoot pressure(See I 1).
high or too low.
(4) Feed dog comes up too niuch from the o Lower the feed dog.
throat plate surface.
(5) Knife fails to cut the fabrics sharply. o Sharpen the lower knife.
(6) Differential feed mechanismis not set o Correct the differential feed mechanism
correctly. ( S e e 13 ) .

Irregular stitching ( I ) Thread is not supplied smoothly Use smooth thread with even thickness or
c l e a nu p t h e t h r e a d p a t h .
(2) Thread tension is too low. o Increasethe thread tension.
(3) Needle is blunt. o Use a new needle.
(4) Pressureapplied by the presserfoot is o Adjust the presserfoot pressure(See I l).
inadequate.
( 5) Height of the feed dog is wrong. Adjust the height of the feed dog (See I 6)

2 2 . S PE CI FIC A TION S
MO-2404 MO-2414 MO-2416
Sewing speed(Max.) 6 5 0 0s . p . m . 6 5 0 0s . p . m . 6 5 0 0s . p . m .
Stitch length 0.8 - 4 mm(1 164"- 5132")(specialmodel : up to 5 mm) 1.5-4mm(5mm)
Needle gauge 1 . 6 , 2 . 0 , 2m
. 4m 1. 6 ,2 . 0 ,2 . 4 ,3 . 2 , 4 . 86, . 8 m n
Overedge width r . 6 ,2 . 4 ,3 . 2 ,4 . O , 4 . 86,. 4 m m 2 . 0 . 3 . 2 . 4 . 0 . 4m. 8
m 3 . 2 ,4 . 0 ,4 . 8 ,5 . 6 ,6 . 4m m
Differential feed ratio G a t h e r i n gs t i t c h l : 2 ( M a x . l : 4 ) S t r e t c h i n gs t i t c h l : 0 . 7 ( M a x . l : 0 . 6 )

Needle DC x 27 (standard) (DC x I may be used)

Presserfoot lift Max. 7.0 mm\9 132") (excluding some subclassmodels)

Lubricatingoil JUKI New Defrix Oil No. 2

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 (iln:,l:,rl#'ii'fJT,ffi:i,:H f:' ")
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rl I||llY||JUlfiIil[U$In|l|.80..[10.
I f H e a d O f f i c e & P l a n t : 2 - 1 , 8 - c h o m e , K o k u r y o - c h o , C h o f u - s h i ,T o k y o , J a p a n
I I B u s i n e s sO f f i c e : 2 3 - 3 , K a b u k i - c h o 1 - c h o m e ,S h i n i u k u - k u , T o k y o 1 6 0 , J a p a n
- cabte: JUK| ToKYo retex:22967:2g2-2301
P h o n e :0 3 ( 2 0 5 ) 118 8 , 1 1 8 9 , 1 1 9 0 1981.'7 Printed in Japan(11)

Appearanceand specificationlisted in this catalogare subjectedto changewithout notice.

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