Juki MO-804, MO-814, MO-816 Instruction Manual

MODEL

MO-804

SUPER

SPEED

SINGLE

INDUSTRIAL

SPEED

TWIN-NEEDLE

INDUSTRIAL

SUPER

INDUSTRIAL

NEEDLE

MODEL

SPEED

OVEREDGING

SEWING

OVEREDGING

SEWING

SAFETY

SEWING

Instruction

MACHINE

MO-814

MACHINE

MO-816

STITCH

MACHINE

Book

CLASS

TOKYO

JUKI

INDUSTKIAL

CO..

LTD.

FIRST

OF

ALL

We thank you for purchasingJUKI MOSOOSeries machines.

Before operating this machine, please read and digest the contentsofthe INSTRUCTION BOOK thoroughly and

understand the functions

SPECIFICATIONS

of

the machine and cherish it everlastingly.

Sewing speed

Stitch

length

Needle gauge Overedging

Ratioofdifferential

Needle

Lubricating

bar

width

stroke

oil

feed

MO-804-DD4

Up to 7,500 s.p.m. Up to

Gather

Stretch

DCx27

(Standard)

DCxJ27

sewing:

(In

caseoffine

New

MO-814-BD4

7,000

0.3 - 4

2.0mm(5/64")

3.2mm(l/8")

1:2

(Max.

1:0.7

synthetic

24.2

mm(61/64")

Defrix

s.p.m. Up to

mm(l/64"-5/32")

1:4)

(Max.

1:0.6)

thread)

Oil

No.

2

MO-816-DD4

3.2mm(l/8")

* Manyother subclassmachines are availableto meet all kinds of sewingrequirements.

CONTENTS

HOW

TO

INSTALL

How to install the How to install

Motor

pulley

Howtoinstall

Starting pedal

HOW

TO

OPERATE

THE

MACHINE

thread

stand,

complete

the

frame

support

and

the

belt

the

head

and

presser foot lifting pedal 2

THE

plate

MACHINE

Cautionsonoperation

Lubrication and drainage 3

Howtoinstall

Threading

MO-804 MO-814 MO-816

The

thread

5.

Presser

6.

7.

Adjusting

8.

Adjusting

9.

III.

ADJUSTING

1.

Knife and overedging width 9

2.

Adjusting the needle guard 10

3.

Adjusting the height

4.

Matching

Matching the upper looper 11

5.

6.

Matching the double chain looper (In case of MO-816) 12

7.

Adjusting the chain looper thread cam (In caseofMO-816) 12

Adjusting the double chain looper avoiding motion (In case of MO-816) 12

8.

IV.

MAINTENANCE OF THE MACHINE 13

V.

CAUSES OF MALFUNCTIONS & CORRECTIVE MEASURES 13

the

needle

the

machine

tension

foot

and

feed dog 7

the

stitch

length

the

differential feed 8

the

THE

lower

differential

feed

ratio

MACHINE

of

the needle 11

looper

SPECIFICATIONS (Applicable to all models) 13

6,500

s.p.m.

1

2

3

4 5 6

7

8

9

11

I. HOW TO INSTALL

THE

MACHINE

1. Howtoinstall

Install the thread stand, complete asshown in the flgure and set it to the table.

the

thread

stand, complete

—

2. Howtoinstall

1) First, install the oil reservoir support post and the-waste

cloth chute (upper) to the frame support plate as shown in

the figure.

Bushing

the

frame

support

Vibration absorbing rubber

Oil reservoir Cloth waste chute, upper

support

Frame

support

plate

m

Table

i.

Bolt

-

"T"

Nut

Bolt tip surface

3) Heightofthe frame

A. In caseofsemi-sunken type table,

the

end

this

surface

case,

lowersurfaceofthe

In bushingtothe

E

lower

insert

frame

Oil

support

of

end

reservoir

Frame

the

partofthe

the

support

a

X

plate

bolt

frame

plate.

•

support

plate

match

with

nut.

support

This can be

iJso.

the

Also,

is sticking

Cutitoff

applied

cut off the end of the bolt

out

from

2)

Attach

chute (upper) at an appropriate position. The installing length

canbeadjusted

esa

—

Bolt

^

Nut

M

the

J^Washer

Frame

'support

plate

to sunken type table B. In

which

the

nut.

- 1 -

Cloth

waste

within

Cloth

waste

chute,

lower

cloth

chute

(lower)tothe

the

areaof40

5mm(3/i6")

v^CLoth

plate

Bolt

caseoffully-sunken

upper

surface

(3/16")

higher

waste

chute,

upper

Set

screw

waste

cloth

mm(i-37/64").

Oil

cap

reservoir

Prame

I

support

plate

type, make the

of the cloth plate 5 mm

than the table

surface,

3. Motor pulley

When

connected

and

the

belt

directlytothe

power

source,

use an electric clutch motor of 3-phase 1/2 HP

(400 W). The dimensionsofthe

motor

pulley

and the belt (M type) are shown in the table

below.

Number rotation

machine

(s.p.m.)

5,000

5,500

6,000

6,500

7,000

7,500

60

Desk

type

34 36 36 38

38

Hz

M-type

(inch)

All-

sunken

type

30 32 32

32

32 34

belt

50

Desk

type

36 38

38

40

Hz

M-type

(inch)

All-

sunken

type

32

34

34 36

belt

Motor

pulley

P.C.D.

(mm)

90

100

110

120

125

135

of of

Motor

pulley

P.C.D.

(mm)

105

115

125

135 145 155

(Note)The dimension of the motor pulleyisshown in

4.

HowtoInstall

I. When installing the machine

ing

rubber

the

head

Vibration

Frame

1

support

absorbmg

rubber

plate

head,

.11

jB:'

insert the vibration absorb

to the holeofthe oil reservoir.

Oil

reservoir

2

P.C.D.

support

system(outer diameteris

Direction

rotation

2.

Loosen When

and

tighten

P.C.D.

of

/a

the

+ 5.5 mm) and the

Guideplateset

belt

guide plate

beltisput

the

set

on,

screw.

screw

lower

Hand

set

V—

screw

the

M-belt

dimensionin inches.

wheel

and

put

the

guide

platetothe

belt

on.

bottom

5.

Starting

pedal

Starting

and

presser

pedal

foot

Presser

lifting

foot

pedal

lifting pedal

Install the starting pedal to the left side and the presser foot

lifting pedal to the right sideas you face the flgure.

Presser

foot

lifting

lever

S-shaped

Cjiain

hook

Attach the chain of the presser foot lifting pedal to the hole at

the top of the presser foot lift lever by hooking it up with a

S-shaped

hookasshown

in the figure.

- 2 -

n.

HOW

TO

OPERATE

1.

Cautionsonoperation

O Do not, under any circumstances, start the machine before filling up the oil reservoir.

e The rotational direction of the

because if you do, the lubrication pump will not function and will invite scorchingofthe machine.

2.

Lubrication

O Use JUKI Defrix Oil No. 2 for lubrication.

Remove

and

pourinJUKI float After

the

indicator

filling

and

drainage

oil cover,

reaches

up,

cover up

Defrix

attach

the

THE

MACHINE

machineisclockwiseasviewed

the funnel in

Oil No. 2 top

lineofthe

oil cover.

the

accessories

until

the

topofthe

oil sight window.

box

oil

from the

pulley

side. Do not run the

0 Inspect the oil sight window every day before operating the

machine.Ifthe oil level falls below the lower line, fill it up

to

the

upper

0 To drain

out

line.

the

oil, remove

the

oil drainage screw.

machine

Lubricating hole

in the

reverse

Upper line

Lower

direction

line

(Caution)

O When the machine is to be operated for the first time or when

it

was idle

of the needle clamp guide bar @ and the top part of the upper looper guide 0 before starting the sewing operation.

foralong

periodoftime,

be sure to oil

the

top

Oil drainage screw

runningofthe machine, apply a small

amountofoil to the

oiling hole 0 at the upper part of the lower knife installing

body.

0 If any oil

scorching or oil leakage. Be sure to use only the designated

JUKI

New

other

than designated oil is used, it might invite

Defrix

Oil

No.

2.

0

3.

HowtoInstall

The standard needle size for both overlock, double chain or for left overlook (MO-816 or MO-814) is DC x 27 #11.

To

install

the

O Rotate the pulleyand

0

Loosen

0 Insert the needle so

the

needle:

needle

the

needle

raise

clamp

up the needleclamp to the

screw

that

the grooved partofthe needle is facing the opposite side as seen from the front of the machine.

,

insert

the

needle

highest

and

push

position.

it up

deep

into the

needle

hole

untilit

stops

and

tighten

the

c

screw.

©

MO-8I4-816

4.

Threading

MO-804

the

machine

Refer to the accompanying figure for correct threading of this machine series.

- 3 -