Brother T-8722A User Manual

8722

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TWIN

NEEDLE DIRECT DRIVE LOCK STITCHER WITH LARGE

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PARTS BOOK

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.............

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·

··

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...

13

15

19

21

21

25

21

29
31

33

35

39

41

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.........................

. 43

.

45

48
49

s1

Notes for using this parts book

1.

This book was prepared based on information available in May 2004.

2. Parts are subject to changes in design without prior notice.

3.

Parts supplied as complete assemblies are circled by a dotted lineC::::::::J

.

4. If the symbol * is found in

gauge parts list on page 48 -50.

A.

Machine body

B.

Upper shaft mechanism ................................. 3

C.

Needle bar rocking mechanism ...................... 5

D. Presser foot mechanism ................................ 7

E.

Feed mechanism
F.

Quick reverse mechanism ............................

G.

Quick reverse switch mechanism ..................

H.

Feed shaft mechanism ................................... 13

J1. Rotary hook mechanism ................................ 15

J2. Rotary hook mechanism

the"

Parts No." column, refer to the different parts lists,

CONTENTS

.. ..

....

..

.... ....

..

....

.. ..

..

.. ..

....

.. ..

....

..

..

......

.. .. ....

...... ....................

.. ..

...... .................... ... 19

. 1

..

11
11

9

K.

Gauge parts .... ....

L.

Lower shaft mechanism .................................

M.

Tension release mechanusm .........................

N. Lubrication
P. Threading mechanism

Q. Bobbin winder mechanism

R.

Thread trimmer mechanism

S.

Thread wiper mechanism ..............................

T1. Control box & motor mechanism .................... 33

Control box mechanism ............ .... ................. 35

T2.

U.

Power supply equipment mechanism

V.

Presser foot lifting solenoid set (Option parts)

Z1. Accessories ..................................................

Z2. Accessories .

Wa

. Warning labels............................

.. .. ..

.. ..

.. ..

.. ..

.. .. .. .. .. .. ..

. ..... . .

..

..

.............. ....

.. ..

..

......

..

.. ..

. . . . . . .

.. . .. .. .. . ..

.. .. .. ..

..

........ 19

.. .. .. .. .. .. .. .. .. .. .. ..

.. ..

.............. ......

..

.... .... ................. 27

..

........ ................. 29

.. .. ..

......

....................

..

..

..

.... ... 39

..

.. .. ..

...

. 45

21
21
23
25

31

41
43

47

Sp. Different parts list........................................... 48

Ga. Gauge parts list ....

Index...............................................................

.. ..

.... ........ .................... ....

..

49
51

A .

~i*DIJ§

I Machine body

6

3

"

;t:1:,

3

~fti!S

26

(

__

_l

I

l~cb>

I~

l

________

27~

I OPTION PARTS "

____

...............

)

I

I

I

j

r-----..,

1 16----<r

l~

I , I

I I

..._

___

T

15

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i

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13i

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19~

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,

I

1

J

1

T -8722A-050

A .

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i*OO~

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
24

I Machine body

CODE

140063001
5A3924001
5A2440001
5A2929001

062500816
5A2441001

062501216
5A2442001

062501416

062501016
5A2443001

062500616
5A2444001
5A2445001
5A2447001
5A2479001
5A2449001
5A2479001

536663051

534438051

116010001
5A2929001
5A2929001

537060001

Q'TY

2

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1

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I)'('

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12.5

::_,

DOWEL
POSITIONING
FACE
RUBBER
SCREW,

REAR
SCREW,
MOTOR
SCREW,
SCREW,
DUST
SCREW,

BED
BEDLED,S
SLIDE
BOBBIN
SLIDE
BOBBIN
SLIDE
SCREW,
SET
RUBBER
RUBBER
LABEL,

PIN

PIN

PLATE

CAP,

PAN

M5X8

COVER

PAN

M5X12

COVER

PAN

M5X14

PAN

M5X10

PROTECTOR

PAN

M5X6

LEG,L

PLATE,

WINDOW

PLATE

ASSY,

WINDOW

PLATE F ASSY

FLAT

SCREW,

SM5.16-40X4
CAP I 12.5
CAP,

GROUNDING

NAME

OF

12.5

LAASSY

R

SM3.18-40X4

12.5

PARTS

RM

25

25

26
27

5A2040001

5A2041001

5A2761001
5A2479001

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1 7

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Japan

LABEL,

< Except

LABEL,

only

CAUTION

for

Japan >

CAUTION

JPNIENG
CHNIENG

"OPTION PARTS"

SLIDE

PLATE,

BOBBIN

LB

ASSY

WINDOW

>

T-8722A-050

2

B ·

J:.fdlfJO{i

, Upper shaft mech .

1

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19

_____

T -8722A-1 09

8 .

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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
24
25
26

27
28
29

30

31

32

CODE

5A2452101
5A4089001

525234001
538707001
538398001

5A4335001

113014000

525260001

5A1120001

523651001
525235001
525236001

5A2460001 1

538710001
523651001
5A2461001
538713100

062403512
028040242

025040232
5A2463001
5A2937101
5A2861001

012061036
513160001
5A2469001

062500816
5A3057001
5A3058101
5A3065001
5A3059001

062500816

I Upper shaft mechanism

Q'TY

1

?'7~?00

1

-r~t:~??~?

1

11~~?rJ'T6004ZZ

1

11~~?rJ'T6004ZZNR

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DO

UPPER
THREAD
BALL

SHAFT,

TAKE-UP

BEARING,

BALL

BEARING,
CRANKSHAFT,
WICK,6X6

N-BAR

(L=90}
PUSHER
SET

SCREW,SOCKET
BOBBIN
SET

SCREW,
SET
PRESSER
BALL
SET
TIMING

WINDER

SCREW,

SOCKET

M8

SCREW,

SOCKET

ADJUSTING

BEARING,

SCREW,

SOCKET

PULLEY, U DO
FAN
SCREW,
WASHER,
WASHER,
TIMING
THREAD
THREAD
SET
T­THREAD

SCREW,
DUST
SHELTER

PAN

M4X35
SPRING
PLAIN

BELT

TAKE-UP
TAKE-UPS-SHAFT

SCREW,

TAKE-UP

SOCKET

SLIDE
TAKE-UP
PAN

M5X8

COVER

PLATE
FELT
HOLDER,
SCREW,

SHELTER

PAN

M5X8

NAME

OF

DO

CRANK
6004ZZ
6004ZZNR

(FT}

DRIVING

(FT)

(FT}

UNIT

6204ZZNR

(FT)

2-4

M 4

LEVER

(FT}

BLOCK

LEVER

PLATE

PARTS

M6X5

WHEEL

M6X6
M6X1

0

M6X6

ASSY,L2-L

UNIT

M6X10

ASSY,

2

COVER

RM

T-8722A-109

4

c

.lt.tm

Bllfi I Needle b

iiJ

ar

rocking mech .

amsm

26~

27

_:__fi)

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25

29

30

b-

34

~~-~~-*1

35

J:il

36

~

~

~

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--~---

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31

28

32

~33

'

29

31

34

5

T-8722A-115

C .

~tffmii.JfMJ~

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
24
25
26
27
28
29
30
31
32
33

34

35
36

CODE

5A4124101
5A3854001
5A2474001

062401016
5A2475001
5A3710001

062350816

112728001
5A3711001
5A3712001
5A2482001
5A2483001
5A2484001

148394000
5A4007001

062500616

5A3848001
507465000
5A3852001
5A2485001
525260001 4
5A2486101

062500816

062061616
5A2489001 1

018062032 1

118735002

5A2490101
523460001
5A4117001

012060636

5A4118001

018062532 1

5A2493001
5A2494001

018062032

I Needle bar rocking mechanism

Q'TY ~~

1

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1

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2

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1

7t"*Jvi--6X20

NEEDLE
NEEDLE
SLIDE
SCREW,
NEEDLE
NEEDLE
SCREW,

WICK,
CRANK
SLIDE
NEEDLE

BAR

ROCKER

BAR

BASE

BLOCK

SLIDER

PAN

M4X10
BAR
BAR

CLAMP

PAN

M3.5X8

L=50

ROD,N-BAR

BLOCK

BEARING
CASE
WASHER,PLAIN

CAP,

N-BAR

FELT

SUPPORT,
SCREW,
FELT
WICK,

PAN

M5X6

SUPPORT,

L=200
FELT
SET

SCREW

SET

SCREW,SOCKET

COLLAR

BUSH,R
SCREW,
SCREW,
NEEDLE
BOLT,

PAN

M5X8

PAN

M6X16

BAR

ROCKER

SOCKET

M6X20
WASHER
ROCKER
SCREW,
LINK
SET
ZIGZAG
BOLT,
WASHER,
NEEDLE
BOLT,

LINK,

PAN

SHAFT,

SCREW,

LINK

SOCKET

PLAIN

BAR

SOCKET

N-BAR

M6X5

N-BAR

SOCKET
BUSH,

M6X25

ROCK

M6X20

NAME

ASSY

U
D

(FT)

ROCKER

P

ARM

OF

PARTS

SHAFT

M6X5

LEVER

(FT)

M6X6

RM

ASSY

ASSY

P

T -8722A-115

6

D .

jlp;tfJU~

I Presser foot mechanism

7

4--e

5

0

28--®~

26~_;;-

27_/

";t:1.Y:~

;_,811!lJ/

12

OPTION PARTS"

11

20

I

I
I

)

/

/

23

7

T-8722A-201

D .

~~mlfi

REF.NO

1

I Presser foot mechanism

CODE

8A2495001
2 062500816
3
4
5
6
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
33
34
35

8A1174001

8A1175001

141208001

807346101
8A2496001
8A2498001

825289001
8A2499001

831006001

839051001 1

807351001

807529001

048030342
8A2677001

012061832

021080306

8A2500001
8A2501001
8A2502001

8A1179001

807349001

8A2504001

012500536

807355051

062501416

021500106
8A2506001
8A2507001

8A1179001
8A2165001
8A1179001
8A4149001

021060306

rJ

1f

;f.

11?~

.§b:g

PRESSER
SCREW,
PESSER
ADJUST
SPRING
PRESSER
PRESSER
GUIDE

BOLT,
PRESSER
LIFTING
SCREW,
TENSION
T-RELEASE
RETAINING
TENSION
SET
NUT, 3 M8
KNEE
PRESSER
KNEE
SHOULDER

P-BAR
SET

SET

SPRING,
SCREW,
NUT, 1 M5
KNEE
KNEE
SHOULDER
SHOULDER
SHOULDER

ADJUSTING

NUT, 3 M6

Q'TY

1

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1 i!';lt-::I:J7­2 7-Tt::75X5
2

;t-~t:c77v''-''*

1 7""::J5X14

1

l'Y

.:1.

-T'Yt-5

1

t::.ff7Jfv,\-

1t::.ff77~?

1

1(:,;t..~5

1

1(:,;t..~6

1

1(:,;t..~5

1

"f3rJi!';l;t'..~6

1 3'Y.:L'T'Yt-6

BAR
PAN
ADJUSTING

SCREW
GUIDE

BAR
BAR

BRACKET,

(CP)

M6X10

BAR

LEVER

PAN

RELEASE

CONNECTING

RING,

RELEASE

SCREW.

LIFTER

BAR

LIFTER

SCREW.

LIFTING

SCREW

COLLAR

SCREW,

EXTENSION

PAN

LIFTER

LIFTER

SCREW,
SCREW,
SCREW,

SCREW.

NAME

OF

BUSH

M5X8

SCREW,

NUT

SPRING,

-5

P-BAR

LIFTING

(SIP

W)

M3.5X12

PLATE

CRANK

ASSY

ROD

E3

WIRE

SOCKET

C-ROD

(FT)

ASSY

LIFTING

M6X18

LEVER

CONNECTING

M5

LEVER

SHAFT

SOCKET

(FT)

M5X5

M5X14

LEVER
BAR

M5
M6
M5

6

PARTS

M14

ASSY

ROD

RM

36
37
38
39
40

810780001
807529001

048030342
8A2677001
8A2578001

"*?'.Ya:,taia "

1

-(t-.:LJI;;L-(11?~

1

1't-.:LJI;;Lv:,::t.J:,?~

2 t-;L'JE3

1

-(t-.:LJI;;L'J-1'~-

1

;t-~t:c77v,,_

"OPTION PARTS "

TENSION

T-RELEASE
RETAINING

TENSION

PRESSER

RELEASE

PLATE
CONNECTING
RING,

E3

RELEASE

BAR

WIRE

LIFTING

ASSY

ROD

LEVER

ASSY

T -8722A-201

8

E .

i2S

'J

BU~

I Feed mechanism

49

52

51

25 24

~~J

.,

50

48

~~

~'

26

27

~

20

p~

23Yr~

21

I

22

43

~

9

T-8722A-202

E .

~

I.J

00~

I Feed mechanism

REF.NO CODE

1
2
3
4
5
6
7
8
9

SA3062001
SA2511001

062501016
SA2512001
SA2515001
SA2516001

062060816

143611201

143612100

10 118954000

11
12
13

14

15

16

17

18

19
20
21

22
23

24
25
26
27
28
29
30
31
32
33

34

35
36
37
38
39
40
41
42
43

44

45
46
47

48

49
50
51
52

SA2791001
8A2585001

825236001

8A2793001

018062032

143613051

143616001
048060342
838428001
8A3056001 1

142746002

129458102
108549001
850098101
100328001

8A2523001

839830101

SA2796001

016061031

8A2526001
8A2527001

012060636

SA2528101
8A2529001

048080342
025100132 1

8A2530001

807374109

8A2531001
8A2541001

062501216
025050336
104821001
062500816

8A2532001

062501216
025050236 1

807376001

8A2533001

062060816
062501216
021500106

Q'TY

1

~·Jt.J.:t.~

2

i.J?::J~7/-J--(

4

-j-~::J5X10

1

~·Jt.J.:t.~i.J?::J~?~

3 7I.JL-t-­1

~·Jt.JI.~t--;(

1

-j-~::J6X8

1

A.-1~-<;t?•Jv/t.J/?~

1

A.-1~-<;t?•Jv/t.J/

1

=.-t:JL-~7

1

A.-(~-{~/~/')/1

1 7-J-t--n•Jsx1o*');(
1

7-J-t:76X10*');(

1

A.-(~-(;t?•Jr'J-T7

1

7-J-~JL-t--6X20

1

A.-1~-<;t?•J?-T•J/?

1

A.-(~-(;t?•Jr'J-T~?

2 t--PJE6

1 ;t?•J;t.:r•J1f

;t?1J7'3'7-l!';/*~

1 ;(=EIJ-(?;t-f.ti.
1

~;(*~4.76

1

o•J::,~

1 ;t.=r•J-17.:¥;£t::'/
1

;(=EIJ-{.Y.~;(t::'/1~*

1

1f

-1~

JL-C'.:I?v,~-

1

1f

-<~

JL-c·v?v,~-~~*

1

;t?1J7'3rJ'i!'.:l~

2 7-J-t--n•Jsx1o

1

~·J1JI.~v/t.J/

1

~/~/.Y?

1 7-J-1:76X6
11f/*-.Y6

1

i.JI.~3t-(vi~-.Y?TR

1

t--PJES

1:7-tffl*-~3'710

1i.J/-tf
1

i.JI.~3t-1v,~-

1

1JI.~3t-1v,~-;t-f.ti.'~*

1

i.JI.~3t-1v,~--<?

1

-j-~::J5X12

1

1:7-tffl*-1'

1 :::j

.k.

-l!/ 10.5

2

-j-~::J5X8

1

/\/t:JL-A.t--'.:11~

1

-j-~::J5X12

t:7-tffl*--T.lrJ5

1

~·J1JI.~/

1

'~*-t.J7

1

-j-~::J6X8

1

-j-~::J5X12

1 1

~

.3..

-J-'.:It--5

~~

11

?~

1

)/~

-(~

-(5

~*

-1?

)1,

7

FEED
GUIDE
SCREW,

SLIDE

FELT

STOPEER
SCREW,
F-ROCKER
FEED
NEEDLE
LEVEL
SET

SCREW,

SET

SCREW,

FEED

BOLT,
LINK
SHAFT
RETAINING
STITCH
FEED
FEED
SCREW,
ORING
POSITIONING
NOTCH
DIAL

LOCK
SPRING
FEED
SET

SCREW,
CONNECTING
ECCENTRIC
SET

SCREW,
SHOULDER
SHAFT,
RETAINING
WASHER,
SPACER
REVERSE
SPRING
REVERSE
SCREW,
WASHER, PLAIN
RUBBER
SCREW,
STOPPER
SCREW,
WASHER,
FEED
SPRING
SCREW,
SCREW,
NUT, 1 M5

NAME

OF

REGULATORASSY,

11

PLATE

PAN

M5X10

BLOCK

ASSY

PAN

M6X8

CONNECTING

ROCKER

CONNECTING

ROD

BEARING

FEED

ECCENTRIC

SOCKET

SOCKET

ROCKER

SOCKET

ARM

M6X20

RING,

LENGTH

DIAL,
REGULATING
REGULATING

WHEEL
(FT)
(FT)

7

E6

7

STUD
SUPPORTER

SM4.76

PIN

SPRING

LEVER

REGULA

TOR

7

SOCKET

(CN)

ROD

SHAFT

SOCKET

SCREW,

R-LEVER

(FT)

M6

TR

RING, EB

PLAINS

STITCHING
STITCHING

PAN

10

LEVER

LEVER

M5X12

L 5

CAP, 10.5

PAN

M5X8

PAN

M5X12

PLAIN

M 5

REGULATOR

SPRING

HOOK

PAN

M6X8

PAN

M5X12

PARTS

ASSY

ROD

M6
M6X10

M6X10

M6X6

PLATE

RM

7

T -8722A-202

10

F .

i2!tiiD&Ifi

I Quick reverse mechanism

.ii!fi.A.{

G

13~

12-u

11~~

10-{J

'/Till~

I Quick reverse switch mechanism

T-8722A-205

-

........

.............

11

T-8722A-508

F .

:i~JiHVI~

I Quick reverse mechanism

REF.NO

1
2
3
4
5
6
7
8

CODE

5A3072001

154729001
154730001
154731000

5A2535001

062500812
062061016 2

5A2992001
9 048060142
10
11
12
13
14
15
16
17
18
19

153138001
5A2536001
5A2540001

016061031
5A2992001

012060636
5A2539001

018062032

149095001

153132000

Q'TY

1 =¥""?-T:..r'.lv/..ft-:?.::
1

:f?:..r~""

1

J-.;L'JE15

1

::f.L...AI--';1/~-

1

'.lv/..ft-:t-:11·-1'

3

T~:J5X8

T~:J6X10

1

v:..r?-'Yt::..r

1

J-.;L'J~?3'7C6

1 ifjj:!(..
1 '.lv/..ft-:vl'\-?.::
1 =¥""?-T:..rv,\-

2 7-Tt--#•)6X10
1

v:..r?-·;~t::..r

2

7Tt:76X6

1

'.lv/-1't-:v1\-~?

1

7T*JL-J-.6X20

1 ifjj:!(..
1

"'T..(CJ:.,t7~-7

~~

QUICK

REVERSE
PLUNGER
RETAINING
RUBBER
SOLENOID
SCREW,

SCREW,

PIN
RETAINING

WASHER,

SOLENOID
QUICK
SET
PIN
SET
SOLENOID
BOLT,

WASHER,

NYLON

STOPPER

PAN
PAN

PLAIN

REVERSE

SCREW,
SCREW,

SOCKET

PLAIN

TUBE,

NAME

SOLENOID

RING,

E15

BRACKET

M5X8
M6X1

0

RING,

EXTERNAL

6.5

LEVER

ASSY

LEVER

SOCKET
SOCKET

LEVER

SHAFT

M6X20

6

L=13.5

OF

(CN)
(FT)

PARTS

ASSY

C6

M6X10

M6X6

RM

T

-8722A-205

G.

~fii.A-1'·;~700~

REF.NO

1

2

CODE

5A2688001

5A2270001

3 534281000

4 532904000 1

5
6
7

532905000
5A1390001
532907000

8 060300606 1 I

9

10

11
12
13

062500616

5A2689001

062500616 1

5A1388001

062500616

I Quick reverse switch mechanism

Q'TY

1

R7?7~I-11-?.::

1 R.A-1'';17-ft-fti
1

R.A-1'';17~-1'

7?7~I-11-

1

R.A.-(';171\1(..

1 R.A-1'';17?.::
1

"";l..(?CJ.A.-(';17

\..f:.,tt-:3X6

2

T~::J5X6

1

::J-t:=t.fti

T~:J5X6

3

::J-t:=t.fti

1

T~:J5X6

~~

REVERSE
REVERSE
REVERSE
ACTUATOR
REVERSE
R-SWITCH
MICRO
SCREW,
SCREW,
CORD
SCREW,
CORD
SCREW,

ACTUATOR
SWITCH
SWITCH

SWITCH

ASSY

SWITCH

BIND

PAN

HOLDER

PAN

HOLDER

PAN

NAME

M3X6

M5X6
M5X6
M5X6

OF

PARTS

ASSY
BRACKET
BRACKET

SPRING

RM

T

-8722A-508

12

H .

i2S

')

fdi(JO{i

1 Feed shaft mechanism

\..

____

16--e

15-1

_...

I

I

13

T-8722A-211