UnionSpecial 39500PA Setup guide

CATALOG

NO.

103PA

First Edition

STYLES

39500PA

39500PE

39500PF

39500PP

39500PT

39500PW

Finest Quality

Adjusting

instructions

and

illustrated parts list

([)

Class

39500-Differential

feed overseamers

with thumbscrew adjusted feed travel

From the library of: Superior Sewing Machine & Supply LLC

FOREWORD

This technical

manual

has

been

prepared to guide

you

in the maintenance

your

new

UNION

SPECIAL

machine. Careful

attention

to the instructions for operating

and

adjusting these

machines

will enable

you

to maintain the superior performance

and

re-

liability

designed

and

built

into every

UNION

SPECIAL

machine.

The

Adjusting Instructions portion of

this

manual

explains in

detail

the proper

setting

for

each

the

components

related to forming the

stitch

and

completing the

functions

the machine.

The

text

of the Adjustments

divided into

two

sections -

Check

and

Procedure.

The

Check

depicts conditions

when

the parts are adjusted cor-

rectly.

The

Procedure

given to explain the proper steps to

taken in the event

adjustments are required. Figures are

used

illustrate

the adjustments using

refer-

ence

letters

to point out

specific

items discussed.

Adjustments are presented in sequence

that

a logical progression

accom-

plished.

Some

adjustments performed out of sequence

may

have

adverse

effect

the function of other

parts.

Implementation of preventative maintenance procedures

can

bring about

signifi-

cant

improvements

in operator productivity

avoiding costly equipment

breakdowns.

Whenever

becomes

necessary to

make

repairs

replace parts

your machine,

sure to

insist

genuine

UNION

SPECIAL

Repair Parts.

These

parts are designed speci-

fically

for

your

machine

and

manufactured with utmost precision to assure long

last-

ing service.

simplify

identification

repair

parts,

the

mechanisms

are

illustrated

exploded views.

These

illustrations

will usually

shown

in conjunction with a

KEY

VIEW

which

presents the

mechanisms

of the

machine

assembled.

The

specific

parts

illustrated

this

page

will appear

shaded

in the

KEY

VIEW.

Catalog

No.

103

39500

For

Styles

39500

First

Edition

1981

Union

Special Corporation

Rights Reserved

All

Countries

Printed

U.S.A.

May,

1981

From the library of: Superior Sewing Machine & Supply LLC

CLASS

DESCRIPTION

High

Speed,

one

and

two

curved needles,

two

loopers, three

and

four thread,

differ-

ential

feed overseaming machines. Fabric trimmer with spring pressed lower knife.

Independent

thumbscrew

adjustments for

main

and

differential

feed

travel.

Enclosed

automatic

lubrication

system.

Fan

cooled.

STITCH

AND

SEAM

TYPE

..........

FEED

SYSTEM

........

MAXIMUM

SPEED

......

(Depending

Operation)

LUBRICATION

........

TECHNICAL

DATA

504

SSa-1, Styles

39500

PA,

PE,

PF, PP,

512

SSa-2, Style

39500

Independent

thumbscrew

adjustments for both

Main

and

Differential Feeds.

6500

RPM,

Styles

39500

PF,

PP,

PT,

7000

RPM,

Styles

39500

PA,

Enclosed Automatic Splash

System

with

Oil

Return

Pump

MACHINE

STYLES

39500

PA-

One

needle,

low

capacity

machine

for

sewing

light

mediumweight

knit or

woven

fabrics.

Stitch

range

8-20

S.P.I.

Typical application -

For

seaming

long

straight

seams

pajamas

and

women's

underwear. Available

Seam

Widths: 3/32 inch

(2.4mm),

l/8

inch

(3.2mm),

5/32 inch

(4mm).

39500

Same

39500

except

fitted

with

narrow

sewing

parts.

Typical applica-

tion -

Seaming

women's

robes

and

lingerie.

39500

Same

39500

except

machine

high capacity

for

sewing

medium

heavyweight knit

woven

fabrics.

Also

equipped with a

main

feed

dog

having

T.P.I.

Stitch

range

8-16

S.P.I.

39500

PP-

Same

39500

except equipped with a

main

feed

dog

having

T.P.I.

39500

Same

39500

except prepared

for

continuous or

intermittent

shirring.

Maximum

shirring

ratio

3 to

Available

Seam

Width:

1/8 inch

(3.2mm).

39500

Same

39500

except

machine

has

two

needles. Available

Seam

Width:

17I

inch (

7mm)

IDENTIFICATION

MACHINES

Each

UNION

SPECIAL

machine

carries

style

number,

which

this

class

machine

stamped

in the

style

plate

located to the

right

rear

the machine.

The

serial

number

stamped

in the extension of casting

the

right

rear base of

machine.

From the library of: Superior Sewing Machine & Supply LLC

SAFETY

RULES

CAUTION!

THIS

SAFETY

SYMBOL

INDICATES

YOUR

PERSONAL

SAFETY

INVOLVED.

PREVENT

PERSONAL

INJURY:

-All

power

sources to the

machine

MUST

TURNED

OFF

before threading,

oiling,

ad-

justing

or replacing

parts.

Wear

safety glasses.

All

shields

and

guards

MUST

in position before operating

machine.

NOT

tamper

with

safety

shields,

guards,

etc.,

while

machine

in operation.

LUBRICATION

Oil

capacity

Class

39500

eight

ounces

(227

milliliters).

Use

straight

mineral

oil

with a Saybolt

viscosity

125

seconds

100

degrees

This

equivalent to

UNION

SPECIAL

specification

No.

175.

Machine

filled

with

oil

spring

cap

in top cover. Before operating,

check

oil

level

sight

gauge

front

machine.

When

proper

oil

level

reached, red

bulb

oil

level

indicator

will

between

red

gauge

lines.

drain

oil

remove

magnetic plug

from

back

machine

near

bottom

edge

of base.

Clean

magnetic plug of

any

metallic material

that

may

have

accumulated in crankcase.

Oil

MUST

changed

periodically

to minimize wear.

THREADING

sure

machine

threaded properly according to threading diagram Fig. 1,

for

Styles

39500

PA,

PE,

PF, PP,

PT,

or Fig. lA,

for

Style

39500

PW.

THREADING

DIAGRAM

STYLES

39500

PA,

PE,

PF, PP,

Before threading machine; unlock presser foot release bushing,

swing

presser

arm

and

cloth plate out

position

and

pull

uppe

r looper thread tube

up.

Turn

hand-

wheel

in operating

direction

until needle

highest position.

Thread

tweezers

660-240

are furnished with

machine

to aid in threading.

Thread

machine

in sequence

shown;

(1) lower looper thread, (2) upper looper

thread, (3) needle thread.

THREADING

DIAGRAM

STYLE

39500

Before threading machine; unlock presser foot release bushing,

swing

presser

arm

and

cloth

plate

out

position

and

pull upper looper thread tube

up.

Turn

hand-

wheel

in operating

direction

until

needles are

highest position.

Thread

tweezers

No.

660-240

are furnished with

machine

to aid in threading.

Thread

machine

in sequence

shown;

(1) lower looper thread, (2)

upper

looper

thread, (3)

right

needle thread

and

(4)

left

needle thread.

From the library of: Superior Sewing Machine & Supply LLC

ROUTE

THREAD

THRU

TENSION

POST

SLOT

TURN TO

RELEASE

PRESSER ARM

ROUTE

LOOPER

THREAD

FRONT

LOOPER

THREAD

PULL-OFF

··

"'--

SWING PRESSER ARM

OUT

~\,~

~··~

Fig.

From the library of: Superior Sewing Machine & Supply LLC

TURN

RELEASE

PRESSER ARM -

---.ll"!:j

Fig. 1A

From the library of: Superior Sewing Machine & Supply LLC

ADJUSTING

INSTRUCTIONS

CLASS

39500

NOTE:

Instructions

stating

direction

location,

such

right,

left,

front

rear

of machine, are given

relative

operator's

position

the machine.

The

handwheel

rotates

clockwise, in operating

direction;

when

viewed

from

the

right

end

of machine.

NEEDLES

EXAMINE

NEEDLE

AND/OR

NEEDLES

ASSURE

PROPER

TYPE

AND

SIZE

BEING

USED.

THE

FOLLOWING

CHECKS

NEEDLE(S)

MUST

MADE

BE-

FORE

ADJUSTING

THE

NEEDLE(S),

LOOPERS

NEED-

GUARDS.

DISCARD

AND

REPLACE

ANY

DEFECTIVE

NEEDLE(S).

-Place a

new

needle of the

same

type

and

size

alongside the

existing

needle to

check

cur-

vature of needle blade

shown

{A,

Fig. 2).

Apply

the thumbnail

test

check

for

blunt-

ness and/or

hooks

the

tip

of needle(s) as

shown

(B,

Fig. 2).

Check

for

any

sharpness around

eye

and/or

grooves of needle(s).

For

a quick check, pull

forth through the needle

eye

shown

(C,

Fig.

shred

and

severe the thread.

Fig. 2

the thread

and

down,

back

and

2).

any

sharpness

exists,

will

sure needle(s)

all

the

way

in needle holder

and

positioned

correctly

with

the spot or

scarf

to the rear

shown

(D,

Fig. 2).

Machines

are

sewn

off

and

shipped

from

the factory with needle(s)

listed

chart

per

machine

style:

Machine

Sty

39500

PA,

PE,

PF,

PP,

39500

Type

and

Size

154

GAS-075/029

154

GAS-090/036

The

following

chart

lists

additional needle types

and

sizes available for Class

39500

machines.

NEEDLE

TYPE

154

GAS

154

GBS

DESCRIPTION

Round

shank,

round

point, curved

blade, standard length, single

groove, struck groove, spotted,

chromium

plated.

Same

154

GAS

except

has

double groove.

SIZES

AVAILABLE

055/022, 065/025, 070/027,

075/029, 080/032, 090/036,

100/040, 110/044, 125/049,

140/054, 150/060

070/027, 075/029,

080/032

From the library of: Superior Sewing Machine & Supply LLC

NEEDLE

TYPE

154

GES

154

GHS

154

GJS

154

GLS

DESCRIPTION

Same

154

GAS

except

has

shorter blunt point.

Same

154

GAS

except

has

point.

Same

154

GAS

except

has

tapered b

1ade.

Same

154

GAS

except

has

ball eye.

SIZES

AVAILABLE

055/022, 065/025, 070/027,

075/029, 080/032, 090/036,

100/040,

0/044, 125/049,

140/054, 150/060

065/025, 070/027, 075/029,

080/032, 090/036

055/022, 065/025, 070/027,

075/029, 080/032, 090/036,

100/040

070/027, 075/029, 080/032,

090/036, 100/040

have

needle orders promptly

and

accurately

filled,

empty

package, a

sample

needle or type

and

size

number

should

forwarded.

Use

description

label.

complete order

would

read

1000

needles,

Type

154

GAS,

Size 075/029

•

Fig. 3

Fig. 4

NEEDLE

REPLACEMENT

Rotate presser foot release bushing

counterclockwise

and

swing

presser foot to the

left.

Turn

handwheel

in operating direction

until needle(s)

lowest position.

Loosen

clamp

nut using socket

wrench

No.

21388

(A,

Fig.

3),

then

remove

needle(s).

Turn

handwheel

until needle holder

(B)

highest position.

Insert

new

needle(s)

all

the

way

in needle holder with spot or

scarf

the

rear.

Tighten

clamp

nut,

swing

presser foot to the

right

and

lock foot into

sewing

position with presser foot release

bushing.

NEEDLE

ALIGNMENT

Check:

Needle(s)

must

enter

the center of needle

slot(s)

(left

right)

throat

plate,

shown

in Fig. 4.

adjustment

necessary,

remove

fabric

guard

and

looper thread

pull-

off.

From the library of: Superior Sewing Machine & Supply LLC

Procedure:

Loosen

needle driving

arm

clamp

screw

(A,

Fig.

and

center needle(s) in needle

slot(s)

throat

plate

adjusting needle

driving

arm

(B)

left

right

required.

Temporarily tighten

clamp

sc.rew

(A), then

proceed to needle height adjustment.

NEEDLE

HEIGHT

Check:

Rotate

handwheel

in operating

direction

until

needle(s)

highest position.

The

needle

height

measurement

from

point of needle(s) to

top of

throat

plate

must

1/2 inch

(12.7mm)

shown

in Fig. 5.

Procedure:

Fig. 5

Loosen

clamp

screw

(A)

and

adjust

needle driving

arm

(B)

front

back

required to

obtain needle height

shown

in Fig. 5, then tighten

clamp

screw

(A)

and

replace looper

thread

pull-off.

PRIOR

MAKING

THE

FOLLOWING

ADJUSTMENT;

REMOVE

CLOTH

PLATE,

CHIP

GUARD,

UPPER

KNIFE,

MAIN,

DIFFERENTIAL

AND

CHAINING

FEEDS.

MACHINE

STYLE

39500

REMOVE

THE

SHIRRING

BLADE

ASSEMBLY.

CLOTH

PLATE

Remove

cloth

plate

{A,

Fig.

loosen-

ing screw

{B)

and

lifting

upward

with stud

(C)

and

screw

(D)

still

assembled to

plate.

Before replacing cloth

plate,

hold stud

(C)

and

tighten screw

(D)

only

enough

re-

move

end

play,

yet

allowing cloth

plate

swing

open

when

assembled.

Assemble

cloth

plate

machine

inserting

stud

(C)

with

flat

and

notch to the

rear

into hole

machine

bed.

Tighten screw

(B)

to press

notch of stud

(C)

against screw

(D).

Fig. 6

From the library of: Superior Sewing Machine & Supply LLC

Fig. 7

left

needle

Style

39500

PW.

Procedure:

LOWER

LOOPER

Check:

PRIOR

CHECKING

LOOPER

ADJUSTMENT;

REMOVE

FRONT

AND

REAR

NEEDLE

GUARDS.

LOOPER

GAUGE

With

looper

extreme

left

position, 1/8 inch

(3.2mm)

the distance

between

looper point

and

centerline

of needle;

1/16 inch

(1.6mm)

left

needle

Style

39500

PW,

shown

in Fig.

LOOPER

CLEARANCE

NEEDLE(S)

Turn

handwheel

in operating direction

that

looper

travels

from

the extreme

left

into

scarf

of needle or

Point of looper should touch but

NOT

deflect

needle(s).

PRIOR

ADJUSTING

LOOPER,

POSITION

UPPER

LOOPER

AND

AWAY

FROM

LOWER

LOOPER.

Gauge

No.

21225-l/8 or 21225-1/16 should

used

to properly

set

looper gauge.

Position lower looper

(A)

to extreme

right

and

loosen

clamp

nut (B).

Then

position

looper to extreme

left

and

set

looper

gauge

adjusting looper in or out of the loop-

shaft

to obtain

l/8

inch

(3.2mm)

or 1/16 inch

(1.6mm)

for Style

39500

PW.

Rotate

handwheel

to position looper into

scarf

of needle or

left

needle

Style

39500

and

set

looper point to touch but

NOT

deflect

needle(s), then position looper to extreme

right

and

tighten

clamp

nut (C).

REAR

NEEDLE

GUARD

Remove

spring

from

inside of lower knife

holder

{A,

Fig.

8),

then assemble knife holder

into

throat

plate

support block.

Replace

rear needle guard

(B)

using screw

(C)

with

front

edge

of guard centered in

slot

of knife holder as

shown.

Temporarily tighten

screw

(C)

to hold guard in

position,

yet

allow-

ing guard to

adjusted.

Rotate

handwheel

in operating direction

lower looper

(D)

travels

from

the extreme

Fig. 8

left

into

scarf

of needle(s). Set guarding

surface of guard (B) to touch but

NOT

deflect

needle(s) while also

setting

guard as

low

as possible to prevent

from

interfering

with needle thread as loop

being

formed

rear

of needle(s), then tighten screw

(C)

securely.

Guard

must

NOT

interfere

with lower knife holder

movement

or contact lower

looper

any

point of

travel.

From the library of: Superior Sewing Machine & Supply LLC

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