Brother T-8420B User Manual
T-8420A
PARTS
BOOK
TWIN
NEEDLE
LOCK
STITCHER
The
latest
Parts
Navigation
parts
Information,
T
refer
to
the
brother.
^t'o
Parts
Navigation.
httpy/partsbook.brother.co.jp/partsnavi/ipn/ind^.html
htti3://partsbook.brother.co.jp/partsnavi/eng/lndex.html
BROTHER
INDUSTRIES,
T-8420A-0
LTD.
1
dx:
0;
3:
-feS
3;
5: / Heavy-weight
F: 7 7
>x—5^ 3 > / Foundation
Minimum
ft®/
Semi
dry
/
Medium-weight
materials
lubrication
type
materials
type
garments
1.
2004^05^
<Dx—^lcS-:5LN-Cftfie^tL/c^,a)r'-ro
3.
(347&>b39^-y)
ClJfifi^'C'^trfcy^-ro
S
A.
B.
±^mm
C.
D.
E.
m.mm
F.
iiyMgiM
G1.:^^||^
G2.i3^m9k
H.
J.
T^li^
K.
mmSimm
^
—
1
3
5
7
9
11
13
17
17
19
19
L.
M.
N.
zi.
Z2.
Wa.
Sp.
Ga.
#Sn°aiiM
ttif
SUSPfn-K
y-i?-5t
5^51
—
21
25
27
29
31
33
34
35
40
1.
This
2.
Parts
3.
Parts
4.
If
the
gauge
book
was
prepared
are
subject
supplied
symbol * is
parts
as
found
list
on
to
Notes
for
based
changes
complete
page
A.
C.
D.
G1.
In
assemblies
in
the"
Parts
34
-41.
Machine
B.
Upper
Needle
Presser
E.
Feed
mechanism
F.
Feed
shaft
Rotary
using
on
Information
design
shaft
No."
CONTENTS
body
mechanism
bar
rocking
foot
mechanism
mechanism
hook
mechanism
without
are
column,
this
parts
available
prior
notice.
circled
by a dotted
refer
mechanism
in
to
May
the
book
2004.
linei
different
j.
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
wnder
labels
parts
parts
list
mechanism
list
mechanism
17
17
19
19
21
25
27
29
31
33
34
35
42
A.
Machine
9 8
body
itfy a >®S I OPTION
PARTS
14—
±
25
c!5^
T
13
J
T-8420A-050
A.
ref.no
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
16
19
20
21
22
23
23
/
Machine
CODE
140063001
SA3924001
SA2440001
SA2929001
062500816
SA2441001
062501216
SA2443001
062500616
SA2444101
025080236
SA2445001
SA2447001
SA2479001
SA2449001
SA2479001
836663051
834438051
116010001
8A2929001
8A2929001
837060001
8A2040001
8A2041001
body
QTY
zrA-b>12.5
^--<35X12
d-^35X6
•9-7^-v3.18X4
=3*i^iz>12.5
DOWEL
PIN
POSITIONING
FACEPLATE
RUBBER
SCREW.
REAR
SCREW.
DUST
SCREW.
BED
WASHER.
CAP,
PAN
COVER
PAN
PROTECTOR
PAN
LEG.L
PLAIN M 8
BEDLED.S
SLIDE
PLATE.
BOBBIN
SLIDE
BOBBIN
SLIDE
SCREW.
SET
RUBBER
RUBBER
LABEL.
<
LABa,
<
LABEL,
WINDOW
PLATE
WINDOW
PLATE F ASSY
FLATSM3.1840X4
SCREW.
CAP,
CAP.
GROUNDING
For
Japan
CAUTION
Except
for
CAUTION
NAME
OF
PIN
12.5
M5X8
M5X12
M5X6
LA
ASSY
ASSY.
R
SM5.16-40X4
12.5
12.5
only
>
JPN/ENG
Japan
>
CHN/ENG
PARTS
RM
24
25
8A2761001
8A2479001
"Option
SLIDE
PLATE.
BOBBIN
WINDOW
parts"
LB
ASSY
T-8420A-050
B
.
Upper
shaft
mechanism
<
r
\
<
-bs
H5-fft»-D3Dffl/
-aoaffl/
For
For
"-DO
11
"-DSD"
8
□"
Minimum
^12
Semi
^
}
1-13
dry
lubrication
type
>
3
type
1
>
14: - DOS,-
-□05«/For"-n05
-nOSra/For'
r
"T
oT > 10
DOFffl I For " -
DOS,-
"
1
DOF"
._X_
19
38
18
17
f—34
'T
20
ly.
I
i
Al
24
25—f
21: - DSS. - DSFffl / For " -033,
-□35ffl/For''-D35"
±
^
7^,
-□3P
J
39
W
T
37
T-8420A-109
B . ±|Ai|^ / Upper
ref.no
1
2
3
4
5
6
7
8
9
10
11
12
13
14
14
15
CODE
SA2746201
SA4089001
S25234001
S38707001
S38398001
SA4335001
113014000
S25260001
SA1120001
S23651001
S25235001
S25236001
SA2861001
SA2935101
SA2936101
SI3160001
QTY
shaft
mechanism
<-nooffl>
1
•:79v^ST
1
1
^■7v<7O^6004ZZ
1
^■7v^':7<r6004Z2NR
1
1
^5t^6X6
1
7-^t76X57|xVy
2
1
2
7i-t76X67hV.>i
1
1
7:Ft76Xi07hV;'«
1
<-n03,-D0Fffl>
1
<-n05ffl>
1
7>t*>S5-L^5
<-nonffl>
1
vt?
^75
<For"-n0D">
UPPER
SHAFT.
ST
THREAD
BALL
BALL
CRANKSHAFT,
TAKE-UP
BEARING,
BEARING.
6004ZZ
6004ZZNR
N-BAR
WICK.6X6(L=90)
PUSHER
SET
SCREW.SOCKET
BOBBIN
WINDER
SET
SCREW.
SCREW,
SET
SCREW,
THREAD
SOCKET
MB
SOCKET
TAKE-UP
<For"-D03.-nOF">
THREAD
<
THREAD
<For"-DOn">
T-TAKE-UP
TAKE-UP
For"-n05">
TAKE-UP
SLIDE
NAME
CRANK
(FT)
DRIVING
(FT)
(FT)
S-SHAFT
LEVER
LEVER
BLOCK
OF
PARTS
M6X5
WHEEL
M6X6
M6X10
UNIT
ASSY,S3-L
ASSY.S5-L
ASSY.
2
RM
20
21
21
22
23
25
26
27
29
1
2
3
4
16
17
8
9
10
11
12
18
19
24
28
30
31
32
33
34
35
36
37
38
39
SA2746201
SA4089001
825234001
S38707001
SA4112001
014500836
825260001
8A1120001
823651001
825235001
825236001
8A2464001
8A2958001
012500536
8A4115001
8A4166001
8A4129001
8A2748001
076023800
823651001
8A2750001
158115001
012061036
SA2720001
823651001
8A2463001
012061036
8A2469001
062500816
8A3057001
8A3058101
8A3065001
8A3059001
062500816
<-n3Dffi>
1
09V'i7ST
1
1
^»7i/^'t7y6004ZZ
1
^'•7v^O76004ZZNR
1
77^^7^55X8
1
77t76X57tNy.jt
2
-fF-74r^K't7'J>
1
2
77t76X67|xV^
v.>«;}'o:;8
1
1
77t76X107hV/
1
1
1
77t75X5
<-D33,-n3Fffl>
1
7>t'>S3P
<-D35ffl>
1
7>t:>S5P
<-n3nffl>
1
1
1
R^7i/^':776D/22ZZ
2
77t:76X67hV-/
1
7-U
1
^^■^v^^'^^'reZCWZZNR
2
77t76X10
1
77t76X67tNV.7t
2
1
2
77ty6X10
1
2
7^35X8
1
1
1
7x;uh
1
1
7'<35X8
ST^5
<For'*-n3n">
UPPER
SHAFT.
ST
THREAD
BALL
BALL
THREAD
SET
SET
BOBBIN
SET
SCREW.
SET
THREAD
SCREW.
SET
TAKE-UP
BEARING.
BEARING.
6004ZZ
6004ZZNR
TAKE-UP
SCREW.
SOCKET
SCREW.SOCKET
WINDER
SCREW.
MB
SCREW.
TAKE-UP
FLAT
SCREW.
DRIVING
SOCKET
SOCKET
M5X6
SOCKET
<For*'-D33,-D3F">
THREAD
<
THREAD
<For"-n3n">
THREAD
BALL
BALL
SET
FULLY
BALL
SET
TIMING
SET
TIMING
SET
THREAD
SCREW.
DUST
SHELTER
FELT
HOLDER.
SCREW.
TAKE-UP
For"-D35">
TAKE-UP
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
SOCKET
M5XB
M5X8
CRANK
CRANK
(CP)
(FT)
(FT)
(FT)
S-SHAFT
(FT)
LEVER.
LEVER
SLIDE
60/22ZZ
(FT)
(FT)
ST
(FT)
(FT)
LEVER
PLATE
SHAFT.
M5X8
M6X5
WHEEL
M6X6
M6X10
ASSY
M5X5
S3
P
,S5
P
B-ASSY
M6X6
M6X10
M6X6
M6X10
COVER
P
T-8420A-109
C.
Needle
bar
rocking
mechanism
<
-Donffl/
I
<-t5.
F7-ftt«-D3nffl/For'*-n3n"
r
0—14
For
■5
"-□OD"
Minimum
Semi
3—1
lubrication
dry
type
type
>
>
35^
;
ts
T-8420A-115
C
.
ref.no
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
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
4
bar
rocking
mechanism
on^
/\'J?K't73'l7K't7V<7^5
d-'<34X10
d-^335X8
7x;UF:j-9-xu
■^-/^□5X6
:7x;i.h
•izyhij-p-
<For''-DOn">
NEEDLE
NEEDLE
SLIDE
SCREW,
NEEDLE
NEEDLE
SCREW,
WICK,
CRANK
SLIDE
NEEDLE
CASE
BAR
ROCKER
BAR
BASE
BLOCK
SLIDER
PAN
M4X10
BAR
BAR
CLAMP
PAN
M3.5X8
L=50
ROD,N-BAR
BLOCK
BEARING
WASHER,PLAIN
CAP.
N-BAR
FELT
SUPPORT,
SCREW,
FELT
WICK,
FELT
SET
SET
PAN
M5X6
SUPPORT,
L=200
SCREW
COLLAR
SCREW.SOCKET
NAME
U
D
ASSY
(FT)
OF
PARTS
SHAFT
M6X5
RM
ASSY
4
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
22
23
24
3
5
6
7
8
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
d-'<35X8
1
2
d-'<zi4XiO
1
1
1
d-^=j35X8
1
1
1
1
1
2
7-ft76X57hV>
1
1
1
■^Kzi5X8
1
•^-'<□6X16
1
/\ij7ttOBOl^'yUy<-
1
7t-7t?;Uh6X2Q
1
1
/\U7|?'!73'!7K0'J>^
2
-^-^□6X5
3':7K't7'j><7-:;^p
1
7:Ffc:76X6
2
1
3't7K'^U>^^7-P
1
7d-7h;i'h6X25
2
1
1
7t'7|?;Uh6X20
<-D3DM>
<For"-
NEEDLE
NEEDLE
SCREW,
SLIDE
SCREW,
NEEDLE
NEEDLE
SCREW,
WICK,
CRANK
SLIDE
CAP,
SET
SET
BUSH,
BUSH.
SCREW.
SCREW,
NEEDLE
BOLT,
WASHER
ROCKER
SCREW,
LINK
SET
ZIGZAG
BOLT,
WASHER.PLA1N
NEEDLE
BOLT,
□3n">
BAR
ROCKER
BAR
BASE ASSY
PAN
M5X8
BLOCK
SLIDER
PAN
M4X10
BAR
BAR
CLAMP
PAN
M3.5X8
L=50
ROD,
N-BAR
BLOCK
N-BAR
SCREW
COLLAR
SCREW.SOCKET
(FT)
L
R
PAN
M5X8
PAN
M6X16
BAR
ROCKER
SOCKET
SHAFT.
SCREW,
SOCKET
SOCKET
LINK,
PAN
UNK
BAR
M6X20
N-BAR
M6X5
N-BAR
ROCKER
SOCKET
BUSH.
P
M8X25
ROCK
ARM
M6X20
(FT)
SHAFT
M6X5
LEVER
M6X6
ASSY
ASSY
P
T-8420A-115
D . }f
<^11^ / Presser
foot
mechanism
m
2—
6 : -□□3,
-□□Fffl/For"-nDF
-DDSffl I For " -□□3,
"
-□□5"
12
11
T-8420A-201
D.
ref.no
1
2
3
4
5
6
6
if
/
Presser
CODE
SA2495001
062500816
SA1174001
SA1175001
141208001
S07346101
S16196001
Q'TY
foot
mechanism
1
■^-^□5X8
1
1
1
1
1
<-DnFffl>
1
PRESSER
SCREW.
PESSER
ADJUST
SPRING
BAR
BUSH
PAN
M5X8
ADJUSTING
SCREW
GUIDE
<For"-nn3,-an5">
PRESSER
<For"-
PRESSER
BAR
□□F">
BAR
SPRING,-5
SPRING,
NAME
NUT
OF
PARTS
SCREW.
F
RM
M14
7
8
9
10
11
12
13
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
:t+^x;H'^7
SA2496001
SA2498001
S25289001
SA2499001
S31006001
S39051001
S07353001
14
012061832
021080306
SA2500001
SA2501001
SA2502001
SA1179001
S07349001
SA2504001
012500536
S07355051
062501416
021500106
SA2506001
SA2507001
SA1179001
SA2165001
SA1179001
SA4149001
021060306
1
1
7t5;Uh6
1
1
1
-^/<+f^535X12
1
1
T-f-t76X18
1
1
1
1
1
1
1
1
•izvy-ti-p-
T-^t75X5
2
^f-y-xT-y
1
■^■^□5X14
1
1
1*>ZL:F'yh5
1
t+FT^b/^-
1
tl-*f7^7\r^^
1
1
1
1
3vx-^»;/h6
1
L//<-/
PRESSER
GUIDE
BOLT.
PRESSER
LIFTING
SCREW.PAN(S/PW)M3.5X12
TENSION
SET
NUT. 3 MB
KNEE
PRESSER
KNEE
SHOULDER
P-BAR
SET
SET
SPRING.
SCREW.
NUT. 1 MS
KNEE
KNEE
SHOULDER
SHOULDER
SHOULDER
ADJUSTING
NUT.3M6
BAR
BRACKET.
(CP)
M6X10
BAR
LEVER
RELEASE
SCREW.
LIFTER
BAR
LIFTER
SCREW.
LIFTING
SCREW
COLLAR
SCREW.
EXTENSION
PAN
LIFTER
LIFTER
SCREW.
SCREW.
SCREW.
SCREW.
P-BAR
LIFTING
CRANK
PLATE
SOCKET
C-ROD
CONNECTING
LIFTING
(FT)
ASSY
LEVER
M5
LEVER
SHAFT
SOCKET
(FT)
M5X14
LEVER
BAR
MS
M6
MS
6
ASSY
M8X18
ROD
M5X5
T-8420A-201
E.
11^ / Feed
51
54
53
52
mechanism
50
27
28
26
21
17
25
l9:<-nn3,-DnFffl
/For
"-□□3,
P
24
18
-□□F">
:<
-□□3,
/For"-nn3,-nnF">
<-nn5ffl/For"-nD5">
-nnFffl
36
37
38
20
:<-nD5ffl/For"-nn5">
22
23
47
49
48
(5>
T-8420A-202
E
.
ref.no
1
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
<-nn5ffi>
1
2
d-^nsxio
4
1
3
7x;uh
1
1
1
1
1
1
1
7d-h^''J6X107hVy
1
7d-t76X107t^V>
1
1
7'd-7H;L'h6X20
1
1
2
h>*7E6
1
<-DD5ffl>
1
NAME
<For"-nn3,-onF">
FEEDREGULATORASSY.il
<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
M6XB
CONNECTING
CONNECTING
ECCENTRIC
SOCKET
SOCKET
ARM
(FT)
(FT)
5
M6X20
RING.
E6
<For"-n03,-DnF">
STITCH
LENGTH
<For"-Da5">
STITCH
LENGTH
DIAL.
4
DIAL.
5
OF
PARTS
ROD
WHEEL
MB
M6X10
RM
ASSY
ROD
5
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
53
54
SA3056001
142746002
129458102
108549001
S50098101
100328001
SA2523001
S39830101
SA2525001
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