Mitsubishi LZ-720, LZ-780, LZ-790 User Manual

MITSUBISHI Industrial Sewing

Model

LZ-720 LZ-780 LZ-790

1..

2.*

3.

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5.

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Machine Parts Catalog

INDEX

[i)

f;f.

1f.

if.

w.

fl

~

1*-

f~

f;f.

Total assembly Arm bed

Thread Upper shaft Thread take-up lever Zig

Presser bar

Reverse sewing mechanism ....................................................................................... .. ·····•·· ·

Feed rocking mechanism .. ·· ........ · · ..... · .. · · · .. · · · .. · · · ... · · · · · · · · · · ... · .. · .. · .. · · · ·

Lower shaft

Rotating hook mechanism .....

Oil

Accessories box· .................................. · ....... ··· ................ . ··· ...

Accessories·· ......................................................................................................................... ..

& its accessori

take-up

-zag motion mechanism····················································································· ······ •···••· ·· ··1 1

lubrication mechanism· ...... · .......... ... ···· ........................ ··

~

mechanism······ ......... ······················································· .. ·······················•····· " ···

li

fting mechani

&

st

es

· · ··· ·· ·

··

··· ..... · · · · · · · · · · · ··· · · ·

ovre

mec

han

ism·· ....... ······ ..... ······ .... ···

& needle bar rocking mechanism ... ·····•······ ............ ·················· · • ······· · 9

sm

............ .................. ................................................. .... ·······••··· ··

itch regulator mechanism ... .............................................................

....

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

··

· · ·· · · · · ·· · ·· · ··· · · ··· · ..

············· ..... · ........... ······· .. ···· · ········ ··· ·· · · 5

··

· · · · · · ·· ··· · ·· ·

..

· · · .... · · · · · .... · · .... · ..... · ........... .. 25

..

· ........... · ..... ·

..

· ..... ·

.. · ..

Page

··

· · · · · · · · ··•••·· · ······ ·· 1

..

19

·· ·23

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

...........

..

· .... ·· ...... · ....

............... ·· ..... ............ · ... 37

....

···

· ...... ...

.. 27

31 33

J9

7

PURCHAS

ING

DfP

T.

P-

100A

198010

'"

--~

TOTAL

ASSEMBLY

LZ-720 ·

780 · 790

*1*001~

ARM

BED & ITS

ACCESSORIES

- 1-

LZ-720 ·

780 · 790

(32)1---

32~----_..,

21

20

6

~:

-

------

--------

--------~

*1*n!H~

'----

ARM

--=g

-

- 2 -5 -

-

~

BED & ITS

Fig. No.

2

3

4

- 5

=---..:M:=T 70A<D

- 67

8

10

11

12 13 14 15 16

17 M9 18

19 20 21

22 23 24

26 27

28

29

30 31

001

32

:m

£

Parts. No.

MT

70AO 691

MT

70AO

M9

111 7 oo""-=-2---=s'"""

MT

70AO

MF

20AO

M9

1900

M9

~-----:

~_

- MT 70E1

0881

M

:-::::-

T

-::

7=oA2

MT

70A 1

MT

70AO

MT

80AO

M9

1113

M9

1117

M9

0621

MT

40AO

M9

0922 0401

M9

0409

MT

60AO

M9

0903

MF

30AO

MT

40AO 7

MT

70A3

M9

0880

"M9T1 10

MT

40AO

MT

40AO

MT

40AO 101

MT

60AO 101

MT

70AO 101

M900M~

MT

70AO

MT

40AO

M9

0915

:::1

- r

600 880

691 135

080 080

691 742 844 844 003

002

053

150

002 053 050

477 002 478

42 691 080

002 500

788

192

470

011

ACCESSORIES

Ref.

No.

W231704H01 W231703H01

50384"-H01

W343993H01

W34399ZH0

p

674006X01

W50137LH01 W502944H01

W484230H01 W484228H01 W484229H01 W48481t..H01 'f- W501866H01

B 50384t..H01

s

56111. W468706H01 W464016H0

S

56112.H03 S

56213H02

W472563H01 s509065H01 W502346H01

W468805H01 W48341 ?He;W501320H01

W50029Th0 W4

W446404H01 W44640SH01 W475455H01

W483476H01

H02

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W446407H01 W46870BH01 A

W473749G01

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(iloi.llf) Gasket 1 0 0 0

(LZ-720) Feed length indicating plate 1 0 I I (LZ-780)(LZ-790) Feed length indicating plate 1 0 0 t I

11/64(40)x4 11/64(40)x13 M6 Spring washer

(

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tor

Top cover - -7;:1 Screw 1 1t64(40) x

Arm side cover 1 0 0 0 I

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Gasket for·side· Oil

check window 1 0 0 0 t I I r

Rubber plug Rubber plug

Cover plate 1 0 0 0 I I

Screw11 Screw 11/

---sc

rew 9,

Spring washer - 1

St

oper

Screw

9164'-(4-,0~)-x~s-=.5------------~,-

Stopper 1 0 0 0 Cover p

:..,..la..,.. Gasket 1 0 0 0 Rubber plug ¢8.8

--

Screw

11

Plug 1 0 0 0 Bed

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Needle plate

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Description

top

cover _

13 13

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Amt.

Req.

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LZ-720 ·

780

· 790

-3-

*i*mli~

ARM

BED & ITS

ACCESSORIES

LZ-720 ·

780 · 790

*1*"-n*

ARM BED & I

F~g

No

36 37 38 39 40

902

41 42 43 44 45

903

46 47

48

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

1\.!f..:J-1'

Pans

No

MF

20AO 181 MF 10A1 M9

1101 MF

10A1 MF 10A1 MF

10EO M9

1116 MF 36A1 M9

1108 MF

10AO

M9

1501 MF 71EO M9

1608

MT

SOAO MT

60AO MT

70AO

MT

70AO MT

70A4 M9

0228 MT

70EO MT

70A1 MT

70AO M9

1108

M9

0901 MT

70AO M9

0911 011 M9

1116

M9

0403 MT

70A1 MT

70AO

M9

0601

MT

70A2

653

046

245

555 660 002

180 001

180 085

210

046

802

246

556

555

740

060

553

187 709 001 002

180

002 050

180 477 003

180

TS

ACCESSORIES

W.f;I:J-f

No

Ret

W470269H01 W602171H01 W501637H01 W502193H01 W501636H01 W450619G02 W501400H01 W471432H01 B

503846H01

B

409034H0

P

648001X01 W34497 W476469H01 W476470H01 W473335H01

W487137H01

W341659H01

W487140H01

W481633H01

W487136G01 W487138H01 W487139H01

B

W500741H01 W484233H01 W502316H01 W601400H01

S

W484226H01

W487141H01

W500833H01

W484232H01

7G01 J:.

503846H01

562211

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(DII!ft)11/64{40)x6

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1/64(40)X8

X3.

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4

Thread guide

Tension Tension spring Tension disc Jor pretension Pretension Screw

Set Thread guide

0-ring

Thread tension Thread tension regulating Thumb nut revolution Tension spring Tension releasing disc Tension disc

Felt

Thread tension releasing pin Thread tension stud Thread take-up spring

Bushing

Screw Thread guide Screw Screw 11/6 Washer Thread guide Stopper

Screw

Thread guide

rEJg_ulati'!9_

complete

11/64(40)X8

screw

S15

for

screw

9/64(40)X4

9/64(40) X 7.5

M4

3/32(56) X 3.4

Oescr.pbon

for

pretension

for

pretensjon

nut

for

p(etension

for

pretension

11/64(40)x5

regulator

thread tension regulator

11/64{40)X 5.5

4{40)x8

.5

complete

thumb

stopper

nut

ffm

Gift

Amt

Req

1 1 1

1 2 1

1

1 1 1 1 2

1

1 2

1

1 1

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0 0

0

0)

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Parts

I

-4

LZ-720 · 780 · 790

-

~f¥1J.r\-fJO~

THREAD

TAKE-UP

....

-,

~

(

904

~71,

69

)

10

COVRE MECHANISM

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1

r-

l

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79

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ao

I

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- 5-

LZ-720 · 780 · 790

~~1JJ\-fl0~

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THREAD

Fig

No. Parts

66 67 68 69 70

71

904

72

73 74 75 76 77 78 79 80

905

81

83

84

85 86

IB.fi.::t-~

M9

1215

M9

0622

M9

0612

MT

70AO

M9

0604

MT

70A2

MT

70EO

M9

0908

MT

70AO

MT

70A1

M9

090

M9

0901

M9

0906

MT

70A1

MT

70AO

MT

70A4

MT

70EO

M9

1103

M9

0501

M9

1207 MF 40AO M9

1206

TAKE-UP

~tf::t-f

No

015 053 050 584 011 742 584 003 838 584

1 001

045 011 838

830

691 W343991HC1 830 011

050 002 352 002

Ref. No.

W501777H01 W483414H01 W474387H01 W231707H01 W501205H01 W484227H01 W344923G01 W602003H01 W484226H01 W231706H01 W600588HC1 W500307HC1 B

509269 W484223HC1 W231705HC1

W34

3990G0

W502941HC1

W500384HC1 W461723HC1 W475495HC1 W469860HC1

COVRE

MECHANISM

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3/16(28}X8

- v

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3'/16(28)X22

~

X 19 Hinged screw 3

Spring washer 1 0 Washer Thread take-up cover Screw Cover plate (Plastic) Thread take· up cover(2) complete Screw Thread cutting knife 1 0 Thread take-up cover

9/64(40)X3

.5

.7

Set

screw Nut Screw Thread cutting knife Face

plate 1

Gas

ket Fee. plate Screw

Washer 1

Screw 3 Collar 1 Screw 3

Oeser

3/32i56}x4

9/64(40}X5

9

64(40)X

9/

9/64(40)x7

for

face plate

co

mple

11

64(40)x7

16(28)x8

16(28)X22

phon

16(28)X

/6

4(40)X3

2.5 (knite adjust) 1

te

19

(2)

( 1) 1

.7 (knife adjust} 1

filll

Amt

Req

1

4

1

1 0

1

1 1

1

9

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I

LZ-720 ·

780

I

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· 790

J:.fdlfJO~

UPPER

SHAFT

MECHANISM

-7-

LZ-720 ·

l

780 · 790

r.

l ,

(97) (97) 1

99

t

(102)

-~

J:.fSI001*

UPPER

Fig.

No

.

91 92 93 94 95

906

96

907

97 98

99

110 111

99 100 101 102

103

104

105 107

108

109

SHAFT

..

,H,:J-f

Parts. No. Ref.

M9 M9 M9 MT MT MT MT MT M9 MT MT MT MT

M9 MT

MT

M9

MT M9 MT MT M9 MT MT

1261

003

1606

001 B

0501

064

70AO

383

70AO

456

70EO

383

70AO

230

70EO

230

1602

001

70A1

146

70AO

683

SOAO

235

70A2

146

0912

001

85AO

235

70A1

456

1503

007

1504

002

70AO

767

1502

002

70AO

682

80AO

682

2201

003

70AO

523

70AO 768

MECHANISM

~~:J-f

No

W484239H01

504016H01

S

684412H04

W484238H01

W484237G01 W343996H01

W343995G01 W500036H01 W483416H01 W484240H01 W484815H01

W483488H01

W483489H01

W487106H01

W501212H01 8

508963H01 p 980006:-<01 W500509H01 W343997H02 W343998H02 W461726H01

p

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Screw Set screw Spring pin Crank Ball Crank complete Upper shaft 1

Set screw Oil Spiral gear Worm

Ba Screw

Timing belt pulley (upper)

Balance wheel complete

Screw Timing belt Timing belt pulley (under)

1/4(40)X

bearing 6204LLBNR

shelter

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M9

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669 002 050 662

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1 109 001 10E2

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148

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166 186 166 167 167 168 169 170 171

172

173

175

176

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182

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M91513001

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M9

1603

M9

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M9

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1606

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M9

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M9

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ink

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Zig·Zag motion shaft bushing (rear)

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.

$,H,::I-

No

. Parts. No.

191 192 19 194 195 195

213

913 201

203

206

914

209 210 211

3

197 198

M9

MT MT M9

MT

M9 MF

M9

MT

MT MT

M9

MT

M9

MF

MT

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1100

085

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559

70AO

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1504

002

70A3

454

70AO

487

1108

001

10E3

148

0501

063

70EO

666

85EO

566

40AO 761

1204

003

40AO

740

70EO

228

1102

002

10E2

148

70A1

454

MECHANISM

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Ref.

s

648001 W484268h01 W346006H01

B

508963H01 W484266H01 W484267H01

B

503846H01

W500231H01

S 561

W346004G01 W344969G01 W483446H01

B

508978H01

W468758H01

W3

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No

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MT MT MT M9 MT M9 M9 M9 MT

IBOA

M9

MT

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No

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064

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454

SOEO

236

BOEO

350

80E1

360

1222

033

BOAO

772

0604

050

1251

045

1221

033

176

3

04041061

AO I 887

SOEO

763

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Ret No.

S

584412H04

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221

222 223 224 225 226

227 228

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-

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M9

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1507

M9

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0617

No

064 454

236 350

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No

.

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S

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No. Parts. No. Ref. No.

231 232 233 234 235 236 237 23 23

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253 254 255

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MT MT M9

MT

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70EO 950 W346009G01 MF 70A1 M9

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MT

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MT

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5002

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70A1 MT

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1214 MT

70AO MT

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454

065 015

002 060

030 691 738

950 062 352

067 572

192 192

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220

572

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Fig. No. Parts. No. Ref. No.

261 262 263 264

265 266

267 268 269 270 27

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l!S~::!-1-'

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screw

sea

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Fig.

No. Parts. No.

276 277 278 279 280 281 282 283 284

285 286 287 288 MN 15AO 289 290 291 292 293 294 295 296 297 MN 298 299 300 301 302 303 304 305 306

307 308 309 310 311

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M9

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Description

Screw 9/

Reverse Nut 15/

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Hinged screw

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Look washer

Nut 3/

Connecting link

Hinged screw

Reverse

Screw

Reverse

Set screw

Reverse stitching crank (left)

Set screw

Bell Pin Oil braid Shaft

Screw Nut Base Set screw Connecting link Pin Set screw Pin Nut lock

64(40)x6.5

stitching lever

64{28)X4.0

86

15/64(28)X

stitching plate

3/16{28)X7.3

85

16{28)X4

15/64(28)X

stitching crank (right)

11

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stitching shaft

15/64(28)X7.0

11

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crank

15/64(28)X23.5

11;64(40)x8.0

15/64(28)X3.0

plate cover

3/16(28)x6

15/64{28)

15/64(28)X4.0

washer

86

13

16

18

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1

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Fig.

No. Parts. No. Aef.No.

316 317 318 319 320

321

322 323 324 325 326 328 330 331 332 333 920 336 337 338

ROCKING

86

~

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MT

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M9

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050

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278

M9

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MT

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104

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MT

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104

M9

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454

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228

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287

MF

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M9

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Descri!Jtion

Eacentric pin Washer Feed

rock shaft crank Screw Bushing Feed Feed Feed

Screw Feed Feed

Feed

Oil

Collar

Screw

Bolt 1 4(24)X

Screw

Feed

Screw

Set screw 151

Feed

11 /64(40)X

dog (LZ-720) dog (LZ-780) dog

1t rock shaft rock shaft crank (right) rock shaft bushing (right)

braid

15

3

11

bar complete 1

11

rock shaft bushing (left}

cc

8{40)x7

64(28)!><:

16(28)X15

15

64{40)x

64{40)x8

64(28)X7

12

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343

345

346

347 348

349

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357

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No

343

344

345

346 347 348 349

355 356 357

$&l.

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MT MF lOAO MT MT

MT MF M9

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shaft

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bunon

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910 066

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I

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379

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Fig.

No.

376 377 378 379 380 381 382 383 384 385 386 387 388 389

SHAFT

Bl!.ft.::J-t:

Pa1b. No.

MF

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334

M9

1602

001 MT 40A3 MT 40A4 MT 40A3 MT MT MT M9 5001 MF MT

M9 M9 M9 1613

833

454

683

40A3 456 W468790H01 40A1

750

70A1

644

063

10A1

572

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154

1108

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&

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W500036H0 W468732H01 W468801H01 W468800H01

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Mitsubishi LZ-720, LZ-780, LZ-790 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual