2-Needle, 2/3/4-Thread Overlock Sewing Machine

MO-114D/104D

INSTRUCTION MANUAL

MO-104D

IMPORTANT:
Read all safety regulations carefully and under- MO-114D
stand them before using your sewing machine.
Retain this instruction manual for future reference.
“IMPORTANT SAFETY INSTRUCTIONS”
When using an electrical appliance, basic safety precautions should always be followed, including
the following: Read all instructions before using this sewing machine.

“DANGER ____ To reduce the risk of electric shock:”

1. The appliance should never be left unattended when plugged in.
2. Always unplug this appliance from the electric outlet immediately after using and before cleaning.

“WARNING ____ To reduce the risk of burns, fire, electric shock, or injury to persons:”
1. Do not use the appliance as a toy. Caution is advised when the appliance is used by children, or
near children. This sewing machine can be used by children aged from 8 years and above and
persons with reduced physical, sensory or mental capabilities or lack of experience and knowl-
edge if they have been given supervision or instruction concerning use of the sewing machine
in a safe way and understand the hazards involved. Children shall not play with the sewing ma-
chine. Cleaning and user maintenance shall not be made by children without supervision.
2. Use this appliance only for its intended use as described in this manual. Use only attachments
recommended by the manufacturer as contained in this manual.
3. Never operate this appliance if it has a damaged cord or plug, if it is not working properly, if it
has been dropped or damaged, or dropped into water. Return the appliance to the nearest au-
thorized dealer or service center for examination, repair, electrical or mechanical adjustment.
4. Never operate the appliance with any air openings blocked. Keep ventilation openings of the
sewing machine and foot control free from the accumulation of lint, dust, and loose cloth.
5. Keep fingers away from all moving parts. Special care is required around the sewing machine needle.
6. Always use the proper stitch plate. The wrong plate can cause the needle to break.
7. Do not use bent needles.
8. Do not pull or push fabric while stitching. It may deflect the needle causing it to break.
9. Do not carry out sewing with a marking pin stuck in the material since doing so can cause knife/
needle breakage. In addition, do not attempt to cut anything other than fabric and thread with
the upper/lower knives.
10. Switch the sewing machine off “O” when making any adjustments in the needle area, such as
threading needle, changing needle, threading looper, or changing presser foot and the like.
11. Always unplug the machine from the electrical outlet when removing covers, when covers are
opened to thread the loopers, when lubricating or when making any other user servicing adjust-
ments mentioned in the instruction manual.
12. Never drop or insert any object into any opening.
13. Do not use outdoors.
14. Do not operate where aerosol (spray) products are being used or where oxygen is being administered.
15. To disconnect, turn all controls to the off “O” position, then remove plug from outlet.
16. Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
17. Basically, the machine should be disconnected from the electricity supply when not in use.
18. If the power cord of this appliance is damaged, it must be replaced with a special cord by your
nearest authorized dealer or service center.
19. (Except USA/Canada) This machine is provided with double insulation.
Use only identical replacement parts. See instructions for servicing Double-Insulated machine.

“SERVICING DOUBLE-INSULATED PRODUCTS

(Except USA / Canada)”
In a double-insulated product, two systems of insulation are provided instead of grounding. No
grounding means is provided on a double-insulated product nor should a means for grounding be
added to the product. Servicing a double-insulated product requires extreme care and knowledge
of the system and should only be done by qualified service personnel. Replacement parts for a
double-insulated product must be identical to those parts in the product. A double-insulated product
is marked with the words DOUBLE INSULATION or DOUBLE INSULATED.
The symbol may also be marked on the product.

“SAVE THESE INSTRUCTIONS”

“This overlock sewing machine is intended for household use only.”
1
Congratulations on your purchase of a JUKI sewing machine.
Please be sure to read safety precautions in “To use the sewing machine safely” in the Instruction
Manual before use to fully understand the functions and operating procedures of the sewing
machine so as to use the sewing machine for a long time.
After you have read the Instruction Manual, please be sure to keep it together with the warranty so
that you can read it whenever necessary.

To use the sewing machine safely

Marks and pictographs included in the Instruction Manual and shown on the sewing machine are
used so as to ensure safe operation of the sewing machine and to prevent possible risk of injury to
the user and other people.
Warning marks are used for different purposes as described below.

Indicates that there is a possible risk of death or serious injury if this mark is
WARNING ignored and the sewing machine is used in a wrong manner.

Indicates the operation, etc. which can cause a possible risk of personal injury
CAUTION and/or physical damage if this mark is ignored and the sewing machine is used in
a wrong manner.

Pictographs mean the following:

Danger warn- There is a There is a There is a

ing which is risk of elec- risk of fire risk of injury
not specified trical shock to hands, etc.

Prohibited Disassem- Do not Do not pour

matter which bly/alteration place fin- oil, etc.
is not speci- is prohibited gers under
fied the needle

Generally re- Disconnect

quired behav- the power
ior plug

2
 WARNING
For the combination of the material and the thread and needle, in particular, refer to the explanation
table in “Replacement of the needle”.
If the needle or thread does not match the material used such as in the case that an extra heavy-
weight material (e.g., denim) is sewn with a thin needle (#11 or higher), the needle can break result-
ing in an unexpected personal injury.

Other precautions
● Do not put the sewing machine under the ● Do not wipe the sewing machine with solvent
direct sunlight or in a humid place. such as thinner.
When the sewing
machine is soiled, put a
small quantity of neutral
detergent on a piece of
soft cloth and carefully
wipe off the sewing
machine with it.

Be aware that the following state can take place since the sewing machine incorporates semi-con-
ductor electronic parts and precise electronic circuits.

● Be sure to use the sewing machine in the

temperature range from 5ºC to 40ºC.
If the temperature is excessively low, the
machine can fail to operate normally.

* The operating temperature of the sewing machine is between 5ºC and 40ºC. Do not use the
sewing machine under the direct sunlight, near the burning things such as a stove and candle, or
in a humid place. By so doing, the temperature in the interior portion of the sewing machine can
rise or the coating of the power cord can melt, causing fire or electrical shock.

3
Contents

Safety instructions··································· 1-3 Adjustments and settings

Contents··················································4 • Stitch length········································· 20
Details of the machine······························ 5,6 • Cutting width········································ 20
• Accessories············································6 • Differential feed····································· 21
Preparing the machine································7 • Gathering············································· 22
• Foot control············································7 • Upper looper converter··························· 23
• Thread stand··········································8 • Roll hemming······································· 23
• Thread, cones, spools······························8 • Presser foot pressure····························· 24
Using the machine Practical sewing
• Main switch············································8 • Thread breakage··································· 24
• Presser foot lifter·····································8 • Unpicking seams··································· 24
• Changing the presser foot·························9 Stitch chart············································· 25
• Looper cover··········································9
Maintenance
• Cloth plate·············································9
• Handwheel··········································· 10 • Replacing the knives······························ 26
• Raising the upper knife··························· 10 • Replacing the bulb································· 26
• Inserting the needles······························ 11 • Cleaning and lubricating·························· 26
• Needles and machine····························· 11 Trouble shooting guide······························ 27
Technical data········································· 28
Threading
Optional accessories································· 29
• Preparation·········································· 12
• Upper and lower looper ······················13-15
• Right and left needles························· 16,17

Trial sewing
• Sewing test·········································· 18
• Thread tension······································ 19
• Adjusting tensions·································· 19

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Details of the machine
MO-114D Details of the machine
1. Looper cover with built in knife guard
2. Looper cover opening indent
3. Cloth plate
4. Sewing light
5. Thread take-up cover
6. Foot pressure adjusting screw
7. Left needle thread tension lever
8. Right needle thread tension lever
9. Upper looper thread tension lever
10. Lower looper thread tension lever
11. Retractable support rod
12. Thread guide support
13. Open thread guide
14. Spool holder pin
15. Foam pad
16. Anti-vibration cone
17. Thread stand
MO-104D 18. Stitch length adjustment dial (MO-114D)
19. Differential feed adjustment dial (MO-114D)
20. Handwheel
21. Rear cover
22. Machine socket
23. Power/Light switch
24. Differential feed adjustment knob

Details of the machine

1. Presser foot lifter
2. Stitch plate
3. Presser foot
4. Upper knife
5. Needle clamp

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Details of the machine
Be sure to turn off the power
Caution switch before opening the looper
1 cover.
6
5 View with looper cover open
2 4 1. Selection lever for overlocking or rollhemming
2. Lower knife
3
3. Lower looper auto threader (MO-114D)
4. Lower knife set screw
5. Lower looper
6. Upper looper

View with cloth plate open

1. Cutting width adjustment knob
2. Stitch length adjustment knob (MO-104D)
3. Differential feed adjustment knob (MO-104D)

Accessories
1. Electronic foot control
2. Upper looper converter *
3. Spool caps
4. Tweezers
5. Cleaning brush/Needle inserter
6. Nets
7. Looper threader **
8. Needle set 130/705
9. Small screwdriver
10. Oiler
11. Accessory bag
12. Dust cover

* Optional for MO-104D

** Only for MO-104D

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Preparing the machine
Attaching the foot control
Plug foot control into the machine socket (A) and then into the main
socket (B). The foot control regulates the sewing speed. The sewing
speed can be adjusted by increasing or decreasing the pressure on
the foot control.

“WARNING”
This appliance has a polarised plug (one blade wider than the oth-
er). To reduce the risk of electrical shock, this plug is intended to fit
into a polarised main socket only one way. If the plug does not fit
fully in the polarised main socket, reverse the plug. If it still does not
Polarized For UL, CSA fit, contact a qualified electrician to install the proper polarised main
socket. Do not modify the plug in any way.(for USA, Canada only).

* Use only the foot control model YC-482 (USA, Canada), YC-483N
(220-240V).
Polarized power
supply socket

Thread stand
Push the support rod firmly into the socket on the back of the ma-
chine. Raise the support rod (C) fully, turning slightly until the po-
sition catches engage. Position the thread guide (D) on the thread
stand so that the arrow is to the front.

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Preparing the machine

Thread / cones / spools Large spools

The anti-vibration cone should If large industrial spools are used,
be used with the wider edge at position the anti-vibration cone up-
the bottom on the spool holder side down on the spool holder pin,
pin when sewing with cones. i.e. with the wider edge at the top.

Household spools Thread nets

Remove the anti-vibration If the threads slip and gets twist-
cones. Place spools on spool ed, cover the spools of upper and
holder pins and push the spool lower looper with the nets supplied
caps on with the rounded side in the accessory bag.
downwards.

Using the machine

Power/light switch
The power/light switch is conveniently placed on the handwheel side of
the machine in front of the socket.
O = Off
I = On with light

Two step presser foot

To raise the presser foot, lift the presser foot lever on the rear of the
machine, until it engages (A). It can be raised again to the maximum
height and held in this position to provide more space between presser
foot and stitch plate.(B). Note: When the presser foot is raised, all the
tensions are released making it easier to thread the machine.

8
Using the machine
Changing the presser foot
• Switch the machine off (Power switch to “0”).
• Raise the presser foot.
• Turn the handwheel towards you until needles are fully raised.
Press the catch (C) to release the presser foot from the clamp. Raise
the presser foot to the highest position (B) and remove the presser
foot to the left. To attach the presser foot, place it under the shaft. The
groove in the shaft should line up exactly with the presser foot pin (D).
Lower the shank and the presser foot will engage automatically.

Looper cover
To open the looper cover press the indent to the right with your thumb
and lower the cover towards you. To close, push it up and press lightly
to the right. The cover engages automatically.

CAUTION: Moving parts - to reduce the risk of injury, switch ma-

chine off (“O”). Before servicing and when opening
looper cover and cloth plate. Close before using!

Cloth plate cover

Opening and closing the cloth plate:
Opening: Push the cloth plate to the left.
Closing: Push the cloth plate to the right.

CAUTION: Moving parts - to reduce the risk of injury, switch ma-

chine off (“O”). Before servicing and when opening
looper cover and cloth plate. Close before using!

9
Using the machine
Handwheel
The handwheel turns forward, i. e. in the same direction as on a house-
hold sewing machine.

Raising the upper knife

• Switch the machine off (Power switch to “0”).
• Disconnect machine from electricity supply.
• Turn the handwheel towards you until needles are fully raised.
• Open the looper cover.
Press the upper knife holder (E) to the right. Turn the knob clockwise (F)
until the knife engages into position as illustrated (G).

10
Using the machine
Inserting needles
Needles can be inserted quickly and easily with the practical cleaning
brush and needle inserter (A).
• Switch the machine off (Power switch to “0”).
• Disconnect machine from electricity supply.Turn the handwheel to-
wards you until needles are fully raised.
• Lower the presser foot.
Using the small screwdriver, loosen the needle setscrews and remove
the needles (B). Place the right hand needle, flat side towards the
back, into the hole of the needle inserter and insert the needle as far
as possible into the needle clamp. Tighten the setscrew lightly and then
insert the lefthand needle in the same way and tighten both setscrews
(C).

Needle and machine

Your overlock machine is equipped with needle system 130/705 H
(household sewing machine needles). These should be purchased
when replacement needles are required. Use needles no. 70 - 90 on
your machine.

11
Using the machine, Threading
Preparation / Tips
• Switch the machine off (Power switch to “0”).
• Disconnect machine from electricity supply.
• Support rod with thread guide must be fully raised.
• Open looper cover and cloth plate.
• Turn the handwheel towards you until the needles are fully raised.
• Raise the upper knife.
• Raise the presser foot. The tension is automatically released.
Thread the machine carefully and in the correct sequence.
Invaluable threading aids simplify threading:
• Colored threading illustration
• Color coded thread path on the machine
• Threading accessories

First thread guide on the Machine

Take the thread with both hands and lay it in the groove.
Press the thread down into the 1st guide on the machine until
it clicks into place.

12
Threading
1. Upper looper thread, blue markings
Place the spool on the spool holder pin as illustrated.
(1) Bring the thread up from the spool and lay it from
back to front into the guide (second from right).
(2) Take the thread with both hands and lay it in the
groove. Press the thread down into the 1st guide on
the machine until it clicks into place.
(3) Slip the thread through the groove.
(4,5,6,7,8) Thread the guides, blue markings.
(9) Turn the handwheel until the upper looper is in the po-
sition as illustrated. Thread the looper eye.
(10) Lift the presser foot, place thread underneath and
lower the presser foot.

Note:
Do not thread the upper looper when sewing with the up-
per looper converter.

MO-104D MO-114D

13
Threading
MO-104D 2. Lower looper thread, red markings
Place the spool on the spool holder pin as illustrated.
(1) Bring the thread up from the spool and lay it from
back to front into the guide (right one).
(2) Take the thread with both hands and lay it in the
groove Press the thread down into the 1st guide on
the machine until it clicks into place.
(3) Slip the thread through the groove.
(4,5,6,7) Thread the guides.
(8) Turn the handwheel to bring the looper to its left most
position. Make a thread loop with your right hand. Use
the looper threader to catch the thread loop from the
left and insert the loop from back to front into the slit
on the lower looper. Pull and hold the thread to the
right. Turn the handwheel to bring the looper to the
right side.
(9) Thread the lower looper eye.
(10) Place the thread under the presser foot.

Note:
If the lower looper has to be re-threaded, cut both needle
threads off at the needle and remove surplus thread from
below. Thread the lower looper and then re-thread the
needles.

14
Threading
MO-114D 2. Lower looper thread, red markings
Place the spool on the spool holder pin as illustrated.
(1) Bring the thread up from the spool and lay it from the
back to the front into the guide (right one).
(2) Take the thread with both hands and lay it in the
groove. Press the thread down into the 1st guide on
the machine until it clicks into place.
(3) Slip the thread through the groove.
(4,5,6) Thread the guides.
(7) Press the lever of the auto threader down.
(8,9) Thread the guide and then the slit on the threader.
Push the auto threader lever up to return it to its
normal position.
(10) Thread the lower looper eye and place the thread un-
derneath the presser foot.

Note:
If the lower looper has to be re-threaded, cut both needle
threads off at the needle and remove surplus thread from
below. Thread the lower looper and then re-thread the
needles.

15
Threading
3. Right-hand needle, green markings
• Switch the machine off (Power switch to “0”).
Place the spool on the spool holder pin as illustrated.
(1) Bring the thread up from the spool and lay it from
back to front into the guide (second from left)
(2) Take the thread with both hands and lay it in the
groove. Press the thread down into the 1st guide on
the machine until it clicks into place.
(3) Slip the thread through the groove.
(4,5) Take the thread under the thread guide plate to the
left and through the take up.
(6) Thread the guide.
(7) Thread the guide on the needle clamp.
(8) Turn the handwheel towards you until the needles
are fully raised. Thread the right hand needle front to
back.
(9) Place the thread under the presser foot.

Note:
If the lower looper has to be re-threaded, cut both needle
threads off at the needle and remove surplus thread from
below. Thread the lower looper and then re-thread the
needles.

16
Threading
4. Left-hand needle, yellow markings
• Switch the machine off (Power switch to “0”).
Place the spool on the spool holder pin as illustrated.
(1) Bring the thread up from the spool and lay it from
back to front into the guide (left one).
(2) Take the thread with both hands and lay it in the
groove. Press the thread down into the 1st guide on
the machine until it clicks into place.
(3) Slip the thread through the groove.
(4,5) Take the thread under the thread guide plate to the
left and through the take up.
(6) Thread the guide.
(7) Thread the guide on the needle clamp.
(8) Turn the handwheel towards you until the needles are
fully raised. Thread the left hand needle front to back.
(9) Place the thread under the presser foot.
When threading is complete, lower the upper knife, close
the looper cover and cloth plate.

Note:
If the lower looper has to be re-threaded, cut both needle
threads off at the needle and remove surplus thread from
below. Thread the looper and then re-thread the needles.

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Trial sewing, Thread tension
Sewing test
After threading make a trail run. Always use a double layer of
fabric to properly check the stitch formation and thread ten-
sion.
• Switch the machine on (“I”).
• Set all tensions to 4.
• Stitch length, differential, cutting width (see adjustment &
settings).
• Lower the upper knife.
• Lower the presser foot.
• Raise the front of the presser foot slightly with your thumb
and position the fabric under the foot just up to the knife.
Sew.
• At the end of the seam continue sewing a 8cm (3”) long
thread chain (A). Cut threads.
• When using thread such as cordonet or similar, pull out the
thread chain (B) carefully by hand as it might catch in the
stitch plate.

Check your trial run

1. Upper looper thread (blue).
2. Lower looper thread (red).
3. Right- hand needle thread (green).
4. Left- hand needle thread (yellow).
Perfect stitch formation is when both looper threads meet at
the fabric edge. The needle threads form straight stitches for
a stretchy and durable seam.

18
Trial sewing, Thread tension
Thread tension
Thread tension should be adjusted to suit the various types of work.
The ideal thread tension for most fabrics and threads is between 3 and 5.
However this can vary quite considerably when special threads such
as filament, woolly nylon, buttonhole twist (cordonet), pearl yarn or
decorative threads are used. Infinitely variable adjustments can be
made from 1-9. Move the lever upwards for more tension, move the le-
ver downwards for less tension.

Adjusting the thread tension

Lower or raise the tension levers by only half or one number, then test
A
sew again and check the result.
• The loops are formed on the underside:
Tighten the upper looper thread tension, (blue) or loosen the lower
looper thread tension, red (D).
• The loops are formed on the upper- side:
B
Tighten the lower looper thread tension, (red) or loosen the upper
looper thread tension, blue (E).
• The right- hand needle thread forms loops on the underside:
Tighten the right- hand needle thread tension, green (F).
C • The left- hand needle forms loops on the underside:
Tighten the left- hand needle thread tension, yellow (G).
• The edge of the fabric curls up, tension for both looper threads is too
tight:
Loosen upper and lower looper thread tension, blue and red (H).
D • The fabric puckers during sewing:
Loosen the right- or left-hand needle thread tension, green or yellow
(I).

19
Adjustments and settings
MO-114D Stitch length
It can be adjusted while sewing. The stitch length is infinitely variable
from 1-4mm. Most overlock work is done with a basic setting of 2.5mm.

MO-104D Stitch length

Switch the machine off (Power switch to “0”).
Open the cloth plate, loosen the knob and adjust to the desired length.
Tighten the knob and close the cloth plate.
The stitch length is infinitely variable from 1 - 4 mm.
Most overlock work is done with a basic setting of 2 - 3 mm.

Cutting width
• Switch the machine off (Power switch to “0”).
• Open the cloth plate. Raise presser foot.
• Push upper knife to the right and turn cutting width dial in the direc-
tion desired.
• Close cloth plate cover and lower presser foot.

Cutting width:
1 = 3 - 5 mm seam width
2 = 4 - 6 mm seam width
3 = 5 - 7 mm seam width
The position of the lower knife determines the width of the seam.
Reduce cutting width (knife moves to the left) if the edges of the fabrics
A B curl up (A).
Increase the cutting width (knife moves to the right) if the loops are too
loose (B).

20
Adjustments and settings
MO-114D Differential feed
There are two feed dogs, one front (C) and one rear (D). The two feed
dogs travel independently and the distance each feed dog travels
during one complete movement can be adjusted. The differential feed
prevents fluting or waving in knitted or stretch fabrics and or closely
woven fabric (E).

Perfectly flat seams in knits or stretch fabrics

The distance travelled by the front feed dog should be greater than that
of the rear feed dog. The front feed dog therefore, feeds an amount of
fabric which the rear feed dog can take up behind the needle without
stretching the fabric.
MO-104D Pucker-free seams in nylon or closely woven fabrics
The distance travelled by the rear feed dog should be greater than
that of the front feed dog. The front feed dog therefore, holds the fabric
back so that the rear feed dog can take it up behind the needle without
any puckering. (F).

21
Adjustments and settings
Adjusting the differential feed
A B
The differential feed can be adjusted by simply turning the differential
feed adjustment dial in the direction desired. Always make a trial run.
The differential feed is infinitely variable and can be adjusted while
sewing.

Effect Fabric
Wave-free seams Thick wool knits, hand knitted articles,
2
(G) very stretchy fabrics
C D Wave-free seams Cotton silk, synthetic jersey, sweatshirt
1.5
(H) fabrics and fine knits
N Normal feed (I) Woven fabrics
Fine nylon jersey, closely woven fabrics,
0.7 No puckering (J)
lining fabric, satin, poplin

Gathering
Using the differential feed a single layer of fabric can be gathered be-
fore sewing it to a garment.
For example, sleeve heads and lower edges, yokes, lace edging or
frills.

Adjustment:
• Stitch - 4 thread overlock
• Differential feed – 2
• Stitch length - 3-4
• Cutting width - 2-3
Increase the needle thread tension (6-8) for a tighter gather.

Note:
When sewing without differential feed, turn the adjustment knob to “N”.

22
Adjustments and settings
MO-114D Upper looper converter (MO-114D)
Use the upper looper converter to sew stitches with one looper thread,
such as 2-thread roll hem, 2-thread flatlock and 2-thread overlock.
• Turn the handwheel to lower the needles.
• Switch the machine off “O”.
• Open the looper cover.
• Attach the converter (accessory bag) to the upper looper arm (A). In-
sert the wire hook into the upper looper eye (B) from back to front.
The upper looper has now been converted, i.e. it no longer carries
thread but it diverts the lower looper thread so that loops are formed
round the edge of the fabric.

Roll hemming
• Turn the handwheel towards you until the needles are fully raised.
• For roll hemming, pull the selection lever to the front marking on the
stitch plate, furthest from the presser foot (C).
• For overlocking push the selection lever forwards to the rear marking
on the stitch plate, nearest the presser foot (D).
The roll hemmer is fully integrated in the machine.
The edge of the fabric will be automatically rolled over, producing a
very narrow, fine seam or hem. Roll hemming is ideal for finishing edg-
es on all fine fabrics, such as evening clothes, lingerie, scarves, frills
and also for curtains and napkins.

23
Adjustments and settings
Presser foot pressure
The presser foot pressure is factory adjusted to a medium setting.
Should you wish to adjust it, simply turn the knob in the direction de-
sired:
Position of knob for normal pressure (A)
More pressure: for thick or stiff fabrics such as denim, tweed, firm linen
(B)
Less pressure: for lightweight or sheer fabrics and knits (C).

Settings and practical sewing

Thread breakage during sewing
Sew off immediately at an angle and remove the work. Re-thread. If the
lower looper thread has broken, cut off both needle threads at the nee-
dles and remove the thread. First thread the looper then the needles.
Start sewing again about 2-3 cm in front of where the thread broke.

Unpicking seams
Using sharp scissors, cut the loops (C). Pull the needle thread (D) and
the stitches will come undone.

24
Stitch chart
Stitch Stitch width Thread tension Basic settings
4-Thread overlock with inte- 5-7 mm Left needle (yellow) 3-5 Stitch length: 2.5
grated safety seam right and left needles Right needle (green) 3-5 Cutting width: 2
Upper looper (blue) 3-5 Differential: N-2 (knits)
Lower looper (red) 3-5 0.7-N (wovens)

3-Thread super stretch 5-7 mm Left needle (yellow) 3-5 Stitch length: 2.5
(MO-114D) right and left needles Right needle (green) 3-5 Cutting width: 1-2
Lower looper (red) 3-5 Differential: N-2
Upper looper converter *

3-Thread overlock 3-5 mm right needle, Left needle (yellow) 3-5 Stitch length:2.5
5-7 mm left needle Right needle (green) 3-5 Cutting width: 2
Upper looper (blue) 3-5 Differential: N-1.5 (knits)
Lower looper (red) 3-5 0.7-N (wovens)

3-Thread Flatlock 3-5 mm right needle, Left needle (yellow) 1-2 Stitch length: 2.5
5-7 mm left needle Right needle (green) 1-2 Cutting width: 2
Upper looper (blue) 3-5 Differential: N-1.5 (knits)
Lower looper (red) 7-9 0.7-N (wovens)

3-Thread narrow seam 1.5 mm right needle Right needle (green) 3-5 Stitch length: 1-1.8
Upper looper (blue) 3-5 Cutting width: 1-1.5
Lower looper (red) 3-5 Differential: N-0.7
Stitch lever: roll hem

3-Thread roll hem 1.5 mm right needle Right needle (green) 3-5 Stitch length: 1-1.8
Upper looper (blue) 3-5 Cutting width: 1-1.5
Lower looper (red) 7-9 Differential: N-0.7
Stitch lever: roll hem

2 Thread wrapped overlock 3-5 mm right needle Left needle (yellow) 3-5 Stitch length: 2.5
(MO-114D) 5-7 mm left needle Right needle (green) 3-5 Cutting width: 2
Lower looper (red) 2-4 Differential: N-1.5 (knits)
0.7-N (wovens)
Upper looper converter *

2-Thread Flatlock (MO-114D) 3-5 mm right needle Left needle (yellow) 1-2 Stitch length: min. 2.5
5-7 mm left needle Right needle (green) 1-2 Cutting width:2
Lower looper (red) 3-5 Differential: N
Upper looper converter *

2-Thread roll hem (MO-114D) 1.5 mm right needle Right needle (yellow) 3-5 Stitch length:1-1.8
Lower looper (red) 3-5 Cutting width:1-1.5
Differential: N-0.7
Stitch lever: roll hem
Upper looper converter *

* Optional for MO-104D

25
Maintenance

WARNING Please refer to the safety instructions!

Changing the upper knife

The upper knife (moving knife) is made from special hardened material.
Should it get damaged, it can be replaced by your local dealer.

Changing the lower knife

Disconnect machine from electricity supply.
Replacing the knives
Should the knives get damaged, they can be replaced by your local dealer.

Replacing the bulb

Switch machine off. (Power switch to „0“). Disconnect machine
from electricity supply.
Unscrew the bulb and replace it with a new one.
The bulbs are max.15 Watt for 120V machines and max.10 Watt for 220-
240V machines. They are available from your local dealer.

Cleaning and lubricating

Switch the machine off (power switch to “O”). Disconnect ma-
chine from electricity supply.
During sewing, dust and fluff collect in and on the machine. This should be
removed regularly.
Your overlock machine requires very little lubrication. Now and then, lubri-
cate only the points illustrated. Please refer to safety instructions.

Precautions to be taken when handling oil

* In the event the oil gets in the eye or adheres on skin, immediately
wash it off in order to prevent irritation and rash.
* If swallowed accidentally, immediately seek for medical advice in
order to prevent diarrhea and vomiting.
* Keep the oil away from children.
* Oil disposal is obliged by legislation. Dispose of the oil properly in
compliance with the relevant legislation.

26
Trouble shooting

Problem Cause Solution Page

The machine • The main switch is not on. • Switch machine on. (power switch to “I”). 8
does not sew • The machine is not plugged in. • Insert plug in main socket. 7

Fabric does not • Differential feed is adjusted incorrectly. • Check the differential feed setting. 21
feed evenly • Presser foot pressure is too low. • Adjust the presser foot pressure. 24
• Lower or upper knife is too blunt or • Replace the upper or lower knife. 26
wrongly positioned.

Thread breaks • Thread tension is too tight for the thread • Reduce thread tension. 19
being used.
• The machine is not threaded correctly. • Check the threading. 13-17
• Needles are inserted incorrectly. • Insert needles fully into needle clamp, with 11
the flat side to the back.
• Wrong needles used. • Use the needle system 130/705H. 11

Needles break • Needles are bent or blunt, points are • Replace needles. 11
damaged. 11
• Needles are not inserted correctly. • Insert needles fully into needle clamp, with
the flat side to the back. --
• Fabric was pulled while sewing. • Guide fabric gently with both hands.

Skipped stitches • Needles are bent or blunt. • Replace the needles. 11

• Wrong needles used. • Use needle system 130/705H. 11
• Presser foot pressure is too low. • Increase presser foot pressure. 24

Poor stitch for- • Threads are not correctly between the • Check if thread is lying between tension 12
mation tension discs. discs.
• Raise the presser foot and pull the thread. 9
• Thread has got caught. • Check threading path of each thread. 13-17
• Machine is threaded incorrectly. • Check threading path of each thread. 13-17

Seams flute or • Fabric was pulled while sewing. • Guide fabric gently. --
wave, especially • Presser foot pressure is too high. • Reduce presser foot pressure. 24
when sewing • Differential feed is set incorrectly. • Adjust differential feed to N-2. 21
knits

Seams pucker • Needle thread tension is too high. • Reduce the needle thread tension. 19
• Differential feed is set incorrectly. • Adjust differential feed to 0.7-N. 21

Fabric edges curl • Too much fabric is in the stitch. • Reduce cutting width. 20
• Thread tension is too high. • Reduce thread tension. 19
• Stitch selection lever is on roll hem. • Set selection lever to overlock. 23

Thread loops are • Too little fabric in the stitch. • Increase the cutting width. 20
too

27
Technical data

Stitch choice 2 needles, 2 loopers: 4 thread overlock with integrated safety seam
1 needle, 2 loopers: 3 thread flatlock, narrow seam, roll hem
1 needle, 1 looper: 2 thread overlock, flatlock, roll hem (MO-114D)
2 needles, 1 looper: 3 thread super stretch (MO-114D)

Needle system 130/705H

Seam width MO-114D MO-104D

3-5 mm (2/3 thread overlock) 3-5 mm (3 thread overlock)
5-7 mm (4 thread overlock, 3 thread super stretch) 5-7 mm (4 thread overlock)

Stitch length 1-4 mm

Differential feed No waving or fluting in knits N-2

No puckering 0.7 - N

Presser foot lift 5 mm

Handwheel Rotates forwards

Sewing speed Up to 1500 sti/min

Weight 7 kg

Dimensions 315(W) × 290(D) × 290(H) mm

Foot control model nr. YC-482 (USA and Canada only)

YC-483N (220-240V)

We reserve the right to make changes in the interest of technical progress.

28
 Optional Accessories
· Blind stitch presser · Piping presser foot
foot

· Elasticator · Beading presser foot

· Cording presser foot · Gathering presser foot

1313

• Upper looper converter

(Optional for MO-104D)

Contact your local dealer.

1313

1313

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2-11-1, TSURUMAKI, TAMA-SHI,
TOKYO, 206-8551, JAPAN
PHONE : (81)42-357-2341
FAX : (81)42-357-2379

Copyright © 2015 JUKI CORPORATION

All rights reserved throughout the world.

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