Brother T-8420A User Manual

T-8420A

PARTS

BOOK

TWIN

NEEDLE

LOCK

STITCHER

S^<DgPqq11lffi(±

The

latest

Parts

parts

information,

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From the Library of Superior Sewing Machine & Supply LLC

I—

'—

0:

3:

-feS

Minimum

Semi

lubrication

dry

type

BROTHER

INDUSTRIES,

T-8420A-0

LTD.

3;

5: I Heavy-weight F:

/

Medium-weight

materials

Foundation

materials

garments

3.

From the Library of Superior Sewing Machine & Supply LLC

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K.

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N.

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5

7

9

11

13

17

19

21

25

27

29

31

33

34

35

5^31

40

1.

From the Library of Superior Sewing Machine & Supply LLC

This

2.

Parts

3.

Parts

4.

If

the

gauge

book

was

prepared

are

subject

supplied

symbol * is

parts

to

as

complete

found

list

on

Notes

based

changes

page

A.

B.

C.

D.

E.

G1.

in

assemblies

in

the"

34

-41.

Machine

Upper

Needle

Presser

Feed

F.

Feed

Rotary

for

using

on

Information

design

without

are

Parts

No."

CONTENTS

body

shaft

mechanism

bar

rocking

foot

mechanism

shaft

mechanism

hook

mechanism

this

available

prior

notice.

circled

by a dotted

column,

refer

mechanism

parts

in

May

book

2004.

line [ j.

to

the

different

parts

1

3

5

7

9

11

13

lists,

G2.

Rotary

H.

Gauge

J.

Lower

K.

Power

L.

Lubrication

M.

Threading

N.

Bobbin

Z1.

Accessories

Z2.

Accessories

Wa.

Warning

Sp.

Different

Ga.

Gauge

Index

hook

mechanism

parts

shaft

mechanism

supply

equipment

mechanism

winder

labels

parts

list

mechanism

list

mechanism

17

19

21

25

27

29

31

33 34 35

42

A.

From the Library of Superior Sewing Machine & Supply LLC

Machine

body

a

I OPTION

PARTS

T-8420A-050

A

From the Library of Superior Sewing Machine & Supply LLC

.

ref.no

1

2

3 4 5 6 7

8 9

10

11

12

13 14 15 16 17

18

19 20 21

22

23

/

Machine

CODE

140063001

SA3924001 SA2440001 SA2929001

062500816

SA2441001

062501216

SA2443001

062500616

SA2444101 025080236

SA2445001 SA2447001

SA2479001

SA2449001 SA2479001 S36663051 834438051

116010001

SA2929001 SA2929001 337060001

SA2040001

SA2041001

body

QTY

zfA-lr>12.5

•9-7^-v3.18X4

hJt^-v5.16

□

A-b>12.5

aAl2>12.5

T-XV-^7

DOWEL

PIN POSITIONING FACEPLATE

RUBBER

SCREW.

REAR

SCREW.

DUST

SCREW.

BED

WASHER.

BED

SLIDE

BOBBIN

SLIDE

BOBBIN

SLIDE

SCREW. SET

RUBBER

LABEL.

<

ABEL,

<

ABEL.

CAP,

PAN

COVER

PAN

PROTECTOR

PAN

LEG.L

LED.S

PLATE.

WINDOW

PLATE

WINDOW

PLATE F ASSY

FAT

SCREW.

CAP.

GROUNDING

For

Japan

CAUTION

Except

CAUTION

PLAIN M 8

NAME

12.5

M5X8

M5X12

M5X6

LA ASSY

ASSY.

SM3.1840X4

SM5.1640X4

12.5

only

JPN/ENG

for

Japan

CHN/ENG

OF

PARTS

RM

R

>

24

25

SA2761001

SA2479001

"Option

SLIDE

PATE.

BOBBIN

parts"

LB ASSY

WINDOW

T-8420A-050

B . ±lillll^/

From the Library of Superior Sewing Machine & Supply LLC

Upper

shaft

mechanism

<SkSl^ftKS-DODffl/

5

r

<

-trS

K5-fft»-D3nffl/

For"-DOD"

^11

For

"-□SD"

Minimum

1-13

J

Semi

dry

lubrication

type

>

14: - Doa,-

-□05ffl/For"-n05"

r

oT > 10

DOFffl / For

r

*' - DOa,-

1

DOF*

._J

19

38

18

17

f—34

20

24

25—f

21: - naa, - naFffl / For"

-□asffl/For-'-mas"

-naa,

±

-nar

j

39

37

T-8420A-109

B . ±1^11^ / Upper

From the Library of Superior Sewing Machine & Supply LLC

ref.no

1

2 3

4

5 6

7 8 9 10

11 12

13

14

15

CODE

SA2746201

SA4089001 S25234001

S38707001 S38398001

SA4335001

113014000

S25260001 SA1120001 S23651001

S25235001

S25236001

SA2861001

SA2935101

SA2936101

SI3160001

QTY

shaft

mechanism

1 1 1

^■7v^7't?^6004ZZ

1

$f7v<7'^'*r6004ZZNR

1 1

^5t^6X6

1 2

1

2

1 1

Tt-t^exiC/hvpt

1

<-n03,-D0Fffi>

1

<-no5ffl>

1

x>t'>S5-L^5

<-nonffl>

1

<For"-n0D">

UPPER

SHAFT.

ST

THREAD

BALL BALL CRANKSHAFT.

WICK.

PUSHER

SET

BOBBIN

SET

SCREW.

SET

THREAD

TAKE-UP

BEARING, BEARING.

6004ZZ 6a04ZZNR

N-BAR

6X6(L=90)

SCREW.SOCKET

WINDER

SCREW. SCREW,

SOCKET

M8

SOCKET

TAKE-UP

<For"-D03,-D0F">

THREAD

<

THREAD

<For"-a0D*'>

T-TAKE-UP

TAKE-UP

For"-n05">

TAKE-UP

SLIDE

NAME

CRANK

(FT)

DRIVING

(FT) (FT)

S-SHAFT

LEVER

BLOCK

OF

PARTS

M6X5

WHEEL

M6X6 M6X10

UNIT

ASSY.S3-L

ASSY.S5-L

ASSY.

2

RM

20

21

22

23 24 25

26 27

28

29 30 31 32 33 34

35

36

37 38 39

<-n3nffl>

1 2 3

4

16 17

8

9 10 11 12 18 19

SA2746201

SA4089001

825234001

838707001

8A4112001

014500836

825260001

8A1120001

823651001

825235001

825236001

8A2464001 8A2958001

012500536

1

't7'7v^ST

1

^Ti?^'t7'^6004ZZ

1

5iTv^'l7'y6004ZZNR

1 1

7:^-^7^55X8

2

T-^-t76X57txy.;«

1

7:#-t76X67tvV/

2 1

V-?t4'''V8

1

T-^-t76X107|xV>

1

T:^t75X5

<-n33,-D3Fffl>

8A4115001

8A4166001

8A4129001

8A2748001

076023800

823651001

8A2750001

158115001

012061036

8A2720001

823651001

SA2463001

012061036

8A2469001

062500816

8A3057001

8A3058101 8A3065001

8A3059001

062500816

1

T->t*>S3P

<-D35ffl>

1

•r>lf>S5P

<-D3nffl>

1

1 1

R^?-7v^'t7y60/22ZZ

7:^ty6X67|^vy

2 1

1

d*7v^O'!r6204ZZNR

2

7:M:76X10

1 2

T-^t76X67hV;<

1 2

T-^t^exio

1

2

■f-^i35X8

1

^xh±/<-

1

7x;uh

1 1

:f-^=l5X8

ST^5

<For"-n3D">

UPPER

SHAFT.

ST

THREAD

BALL BALL

THREAD

SET

BOBBIN

SET

SCREW.

SET

THREAD

SCREW.

SET

TAKE-UP

BEARING, BEARING.

6004ZZ 6004ZZNR

TAKE-UP

SCREW.

SOCKET

SCREW.SOCKET

WINDER

SCREW.

SOCKET

M8

SOCKET

TAKE-UP

FUTM5X6

SOCKET

<For"-D33,-D3F''>

THREAD

<

THREAD

<For"-D3D">

THREAD

BALL

SET

PULLY

BALL

SET

TIMING

SET

TIMING

SET

THREAD

SCREW.

DUST

SHELTER

FELT

HOLDER, SCREW,

TAKE-UP

For"-D35'*>

TAKE-UP

BEARING

BEARING.

SCREW.

BEARING.

SCREW,

PULLEY

SCREW,

BELT

SCREW.

TAKE-UP

PAN

COVER

PLATE

SHELTER

PAN

BUSH

RADIAL

SOCKET

6204ZZNR

SOCKET

ASSY.U

SOCKET

M5X8

CRANK

(CP)

(FT)

DRIVING

(FT)

S-SHAFT

(FT)

LEVER.

LEVER

SLIDE

(FT)

(FT) (FT)

(FT)

LEVER

PLATE

SHAFT,

M5X8

M6X5

WHEEL

M6X6

M6X10

ASSY

M5X5

S3

P

.S5

P

B-ASSY

60/22ZZ

M6X6

M6X10

ST

M6X6

M6X10

COVER

P

T-8420A-109

C.

From the Library of Superior Sewing Machine & Supply LLC

Needle

bar

rocking

mechanism

<

-feS

-nonmi

For

"•□OD"

•'-□an*'

Minimum

Semi

lubrication

dry

type

gssj®—4

>

13

35-®

fS5SS®~~4

T

i

"♦4

^

T-8420A-115

REF.NO

From the Library of Superior Sewing Machine & Supply LLC

1

2

3

4

5

6 7

8 9

10 11

12

13

14

15

16

17

18 19 20 21

CODE

SA4124101 SA3854001

SA2474001

062401016 SA2475001

SA3710001

062350816

112728001

SA3711001

SA3712001

SA2482001

SA2483001 SA2484001

148394000

SA4007001

062500616 SA3848001 S07465000 SA3852001

SA2485001 S25260001

\ / Needle

QTY

bar

1

1 1

2

±'<□4X10

1

±^<□35X8

1 1 1

1 1

:7x;uh±-9-xu

1

±^<□5X6

7x;uh±-±xD

1

1 1

:7x;uh

2

4z'yh^'7-

4

7±t76X57f^V>i

rocking

mechanism

<For

"-□on">

NEEDLE

SLIDE

SCREW,

NEEDLE

SCREW,

WICK,

CRANK

SLIDE NEEDLE CASE

BAR

ROCKER

BAR

BASE

BLOCK

SLIDER

PAN

M4X10

BAR

CLAMP

PAN

M3.5X8

L=50

ROD,N-BAR

BLOCK

BEARING

WASHER.PLAIN

CAP,

N-BAR

FELT

SUPPORT,

SCREW,

FELT

WICK,

FELT

SET

PAN

M5X6

SUPPORT,

L=200

SCREW

COLLAR

SCREW,SOCKET

NAME

U

D

SHAFT

ASSY

(FT)

OF

M6X5

PARTS

ASSY

RM

4

6 7 8 25 26

27

28 29

30

31

32

33

34

35 36 37 38

39

40 41 42

43

44

<-D3Dffl>

22

23

24 3

5

14

SA4093001

SA2471001

062500816

SA2474001

062401016

SA2475001

SA3710001

062350816

112728001

SA4094001

SA2481001

148394000

SA2485001 S25260001

SA4095001

SA2486101

062500816 062061616

SA2489001

018062032 118735002

SA2490101

S23460001

SA4117001

012060636

SA4118001

018062532

SA2493001

SA2494001

018062032

1 1 2

±^<□5X8

1

2

±^<□4X10

1

±^<□35X8

1 1 1

^^□"7

1 1

2

7±t±6X54^Vy 3'!7K'!7v^/^;UL

1

1 1

±^<□5X8

1

±^<□6X16

1

/\«j7t?03'!7K't7U/<-

1

7±7K;bh6X20

1 1

/\U7K'!73*t7K'!7';>^

2

±^□6X5

1

2

7±t76X6

1

3'!7K'^7'J>^*7-P

1

7±7|x;Uh6X25

2 1

1

7±7f?;UF6X20

<For"-

NEEDLE NEEDLE

SCREW,

SLIDE

SCREW,

NEEDLE

SCREW.

WICK, CRANK

SLIDE

CAP,

SET

BUSH,

BUSH. SCREW.

SCREW,

NEEDLE

BOLT,

WASHER

ROCKER SCREW, LINK

SET

ZIGZAG

□3D">

BAR

ROCKER

BAR

BASE

PAN

M5X8

BLOCK

SLIDER

PAN

M4X10

BAR

CLAMP

PAN

M3.5X8

L=50

ROD.

N-BAR

BLOCK

N-BAR

SCREW

COLLAR

SCREW.SOCKET

L

R

PAN

M5X8

PAN

M6X16

BAR

ROCKER

SOCKET

SHAFT,

SCREW,

LINK,

PAN

UNK

M8X20

N-BAR

M6X5

N-BAR

SOCKET

BUSH,

BOLT,SXKETM6X25

WASHER,PLAIN

NEEDLE

BOLT,

BAR

ROCK

SOCKET

M6X20

SHAFT

ASSY

(FT)

M6X5

LEVER

ROCKER

(FT)

M6X6

P

ARM

ASSY

P

T-8420A-115

D

From the Library of Superior Sewing Machine & Supply LLC

.

6;

-□□3,

-□□Fffl/For"-nnF"

Presser

foot

mechanism

-DDSffl I For " -□□3,

O

2—

-DDS

12

14 15

28

@

11

T-8420A-201

D

From the Library of Superior Sewing Machine & Supply LLC

.

ref.no

1

2

3

4

5

6

/

Presser

CODE

SA2495001

062500816

SA1174001 SA1175001

141208001

S07346101

S16196001

Q'TY

foot

1

-^-^□5X8

1

mechanism

PRESSER

SCREW,

PESSER

ADJUST

SPRING

BAR

BUSH

PAN

M5X8

ADJUSTING

SCREW

NUT

GUIDE

<For'*-DD3,-DD5">

PRESSER

<For"-

PRESSER

BAR

□□F"?'

BAR

SPRING,-5

SPRING,

NAME

SCREW.

OF

F

PARTS

M14

RM

7 8 9 10

11 12 13

14 15

16 17

18

19

20 21 22 23 24

25

26

27 28

29

30

31 32

SA2496001 SA2498001

S25289001

SA2499001

S31006001 S39051001

S07353001

012061832 021080306

SA2500001 SA2501001

SA2502001 SA1179001 S07349001

SA2504001

012500536

S07355051

062501416

021500106

SA2506001

SA2507001

SA1179001

SA2165001

SA1179001

SA4149001

021060306

1

;tf;uh6

1

:fy-XTyx3 y-^-tf^535X12

1 1

ry-t^exis

1

3vxy-:/h8

1

:t-y-xT^V/^-

1 1 1

:^-y-XTyU/N'-V'^

1

T-f-t^SXS

2

:i-y-X7'5rU/<-/<^s

1 1

y-/<zi5X14

ivxy-':;F5

1 1 1 1 1 1 1

3vxy-^:/F6

1

PRESSER

GUIDE

BOLT,

PRESSER LIFTING

SCREW,PAN(S/PW)M3.5X12

TENSION

SET

NUT. 3 M8

KNEE

PRESSER

KNEE

SHOULDER

P-BAR

SET

SPRING,

SCREW,

NUT, 1 M5

KNEE KNEE

SHOULDER SHOULDER SHOULDER ADJUSTING NUT, 3 MB

BAR

BRACKET,

(CP)

M6X10

BAR

LEVER

RELEASE

SCREW,

LIFTER

BAR

LIFTER

SCREW,

LIFTING

SCREW

COLLAR

SCREW,

EXTENSION

PAN

LIFTER

SCREW, SCREW. SCREW,

SCREW,

P-BAR

LIFTING

SOCKET

C-ROD

LIFTING

CRANK

PLATE

(FT)

ASSY

LEVER

CONNECTING

M5

LEVER

SHAFT

SOCKET

(FT)

M5X14

LEVER BAR

M5 MB M5 6

ASSY

M6X18

ROD

M5X5

T-8420A-201

E.

From the Library of Superior Sewing Machine & Supply LLC

iilU

11^ / Feed

mechanism

51

54

53

52

:<

-□□3,

/For"-nn3,-nnp'>

<-nn5ffl/For"-DD5">

-UOFm

50

27

28

21

16-^

26

25

i9:<-na3,-DnFffl

24

17

/For"-am.

22

23

18

-□□F'*>

(3)

36

37

38

20

:<

-nusm I For

47

"-□□5"

49

>

48

T-8420A-202

E

From the Library of Superior Sewing Machine & Supply LLC

.

ref.no

1

2 3 4 5 6 7

8 9

10

11

12

13

14

15

16

17

18

19

20

/

Feed

CODE

SA3062001

SA2509001

SA2511001

062501016

SA2512001

SA2515001

SA2516001

062060816

143611201 143612100

118954000

SA2518001

SA2585001

S25236001

SA2521001

018062032

143613051

143616001

048060342

S38422001

S38427001

mechanism

QTY

<-Dn3,-DDFffl>

1

2

:t-^zi5Xio

4

1

3

:7x;uh

1

d-^I36X8

1

X-f

1 1

7d-h^'U6X10;i^V-/

rd-t^exiDT^v./

1 1 1

7d-7t^;Uh6X20

1 1

2

1

<-D05ffl>

1

'J

NAME

<For"-nn3,-nnF">

FEED

REGULATOR

ASSY,

<For"-nD5">

FEED

REGULATOR

GUIDE

PLATE

SCREW,

SLIDE

FELT

STOPEER

SCREW.

F-ROCKER

FEED

NEEDLE LEVEL

SET SET

FEED

BOLT,

LINK SHAFT

PAN

BLOCK

PAN

ROCKER

BEARING

FEED

SCREW, SCREW,

ROCKER

SOCKET

RETAINING

ASSY

M5X10

ASSY

M6X8

CONNECTING

ECCENTRIC

SOCKET SOCKET

ARM

5

M6X20

RING.

E6

<For"-Dn3,-DDP'>

STITCH

LENGTH

<For"-DD5">

STITCH

LENGTH

DIAL,

OF

11

ROD

WHEEL

(FT)

M6

(FT)

M6X10

4

5

PARTS

ASSY

ROD

RM

5

40

42

43

44 45

46

47 48 49

50

52 53 54

21 22 23 24 25 26 27

28

29 30 31

32 33 34 35

36

37 38 39

41

51

SA3056001

142746002 129458102 108549001

S50098101

100328001

SA2523001

S39830101

SA2525001

016061031 SA2526001

SA2527001

012060636

SA2528101 SA2529001

048080342

025100132

SA2530001

S07374109

SA2531001

SA3067001 S48367000

062501216

025050336

104821001

062500816 SA2532001 062501216

025050236

S07376001

SA2533001

062060816

062501216

021500106

1 1

1

v>^-ix4.76

0'J>^

1 1 1 1 1 1

2

7d-hA*'J6X10 4F-g^x^u>:^>

1 1

1

Td-t76X6

1

^Xi/:??>rb/\-v^TR

1

M9E8

1

1 1 1

^x

1

^-:^-g-X/

2

1

d-><P5X12

1 1

p*A-tr>10.5

d-^35X8

2

1

d-K=l5X12

1

4F'J^JX4r/^^-

1

d-Ka6X8

1

"^-^35X12

1

U/W

FEED

REGULATING

FEED

REGULATING

SCREW,

ORING

POSITIONING

NOTCH DIAL

SPRING

FEED

SET

CONNECTING ECCENTRIC

SET

SHOULDER

SHAFT.

RETAINING

WASHER.

SPACER

REVERSE

SPRING

LEVER

RUBBER

SCREW. WASHER. RUBBER

SCREW,

SM4.76

SPRING

LOCK

LEVER

REGULATOR

SCREW,

R-LEVERTR

RING,

PLAIN

STITCHING

GUIDE

PAN

PLAIN L 5

CAP,

PAN

STOPPER

SCREW,

WASHER,

FEED

SPRING

SCREW,

PAN

PLAIN

REGULATOR

HOOK

PAN

NUT. 1 MS

STUD SUPPORTER

5

SOCKET

ROD

SHAFT

SOCKET

E8

SIC

M5X12

10.5

M5X8

M5X12

MS

SPRING

M6X8

M5X12

(CN)

(FT)

MS

LEVER

M6X10

M6X6

T-8420A-201

10

F.

From the Library of Superior Sewing Machine & Supply LLC

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Feed

shaft

mechanism

5i-:/->3>®a / OPTION

19

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Dry

29

Type

30

26

4

13

>

18

16—®

11

14

13

T-B420A-211