Brother T-8421A, T-8422A User Manual

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T-8421A

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PARTS BOOK

T-8422A

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TWIN NEEDLE LOCK STITCHER[T-8421A]

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...

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. 53

....

...

..

....

45

47

49 51

54

56

67

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

4.

If

the

symbol*

gauge parts list on page 54 -66.

is found in

the"

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

by

a dotted line

CONTENTS

A.

Machine body . . . .

B.

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

..

. . . . . .

..

. . . . . .

..

. . . . . .. ..

..

. . . . . .. . .

.. ..

. . . . . . .

..

..................... .. . . .. 3

L.

.......

..1.

..

. . .. .. . . . . .. . . . . . . 1

C. Needle D. Presser foot mechanism ...

E.

Feed mechanism ..................................... ......................... ...

F.

Quick reverse mechanism

G.

Quick reverse switch mechanism . .. . .

H.

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

J1. Rotary hook mechanism (T-8421A) .......................................

J2. Rotary hook mechanism (T-8422A) .......................................

J3. Rotary hook mechanism . . .

K.

Gauge parts . . .

L.

Lower shaft mechanism ... . .

M. Tension release mechanusm (T-8422A)................................ 25

N.

Lubrication .............................................................................

P. Threading

Q. Bobbin winder mechanism . ..

bar

rocking mechanism ...... .............

.. ...

..

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

..

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

..

.. . . . .....

.. .. ..

..

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

mechanism.

.. ..

..

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

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

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

..

....

..

....

.. ..

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

..

. . .

..

. . . . . . . . .. .

. .

.. ..

. . . . .. . .

.. .. . ..

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

.. .. .. ..

. . . .

..

...........

..

.... ... . ...

..

.......... 5

................... .. 7

..

.. ..

. . . . . . .

..

. . . .

..

. ....

.. .. . ..

. .

..

. . . 23

..

. . ..

..

. . . . . .. ..

..

. . 23

. ..... ..

.. ..

........ 25

.. ..

. . .

..

. . . . 33

11 11 13 15 19

27 31

9

R.

Thread trimmer mechanism................................................

S.

Thread wiper mechanism (T-8422A) ..................................... 37

T1. Control T2. Control

U.

Power supply equipment mechanism .

V.

Presser foot lifting solenoid set mechanism (Option parts)....

21 . Accessories .........

22

. Accessories...........................................................................

Wa. Warning

Sp. Different parts list.................................................................. 54

Ga1. Gauge parts list (T-8421A) .................................................... 56

Ga2. Gauge parts list (T-8422A) .................................................... 63

Index........

box

& motor mechanism .............................. ........... .. 39

box

mechanism .

labels..

..................................................................... 53

..

........................................................................... . 67

..

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

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

..

.....

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

..

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

..

.. .... .. .

.. .. ..

.. ..

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

....

.. .. ..

..

. . . . . ....

..

.....

.. .. . ..

..

. 49

35

41 45 47

51

A .

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POSITIONING FACE RUBBER SCREW, REAR SCREW, MOTOR SCREW, SCREW, DUST SCREW, BED WASHER,

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

PLATE

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PAN

COVER

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PROTECTOR

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1 2 3 4 5 6 7 8 9 10

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1 2 3 4 16 17 8 9 10 11 12 18 19 20

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21 22

---------

23

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26 27 28 29 30 31 32 33 34 35 36 37 38 39

~

$#

SA2452101 1 SA4089001 1

S25234001 1 S38707001 S38398001 SA4335001

113014000 S25260001 SA1120001

S23651001

S25235001 1 t'-tl S25236001 SA2861001 1

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--

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012500536 SA4115001 SA4166001 1 SA4129001 1

---------------

SA2460001

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SCREW, THREAD

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TAKE-UP

----

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30 31 32 33 34 35 36 37 38

39 40 41 42 43

44

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NAME

OF

PARTS

<For

"-DOD">

NEEDLE NEEDLE SLIDE SCREW, NEEDLE NEEDLE SCREW, WICK, CRANK SLIDE

NEEDLE CASE WASHER.PLAIN

CAP,

FELT

SCREW,

FELT

WICK,

FELT

SET

BAR

ROCKER

BAR

BASE

BLOCK

SLIDER

PAN

M4X10 BAR BAR

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T-8422A-301

Brother T-8421A, T-8422A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual