Seiko 4R57A Kurzanleitung

PARTS LIST / TECHNICAL GUIDE

Automatic Cal.4R57A

　 Driving　system Automatic winding with manual winding mechanism

Additional function ・Date correction function

・Second hand stop function

Crown Manual winding (Clockwise only)

operation Date setting (Counterclockwise only)

Time setting (Hour and minute)

Vibration per hour 21,600 vibrations

Daily Rate

Between　＋45　～　－35　seconds

(Between 5℃ and 35℃)

Loss/Gain

Instantaneous rate at T0 Isochronous fault

（Fully would condition)

Standard rate

Testing　positions Dial upward 6 o'clock at 9 o'clock at Dial upward

for measurement

the top the top

Measurement

（Daily rate in +25 s/d +35 s/d +35 s/d 　±30 s/d

　　seconds：s/d） -15 s/d -25 s/d -25 s/d

Regulation system ETACHRON system

Lift angle of the escapement 53°

Continuous operating time From fully wound to stoppage　：　approximately　41　hours

Jewels 29 jewels

1/14

Cal. No.

Normal position

Item

4R57A

2nd click

1st click

・3 Hands (Hour, Minute, Second)

・Date calendar Hand

・Power reserve indicator

Movement Size

・Outside diameter: Ф29.36mm

・Height：6.63 mm

Disassembling procedures Figs. →

Reassembling procedures Figs. →

0439 190

Dial spacer

4408 245

Dial holding spacer

0012 310

Auxiliary train wheel

bridge screw

0126 190

Auxiliary train wheel bridge

0538 001

Barrel arbor pinion

0817 047

Intermediate power reserve wheel 1026 002

Planetary reduction wheel

1009 004

Second sun wheel

1001 025

1019 190 Sun and planet unit

Center power reserve wheel

1009 003

0817 190 Sun wheel

Intermediate center power reserve wheel

0491 190

Dial washer

・Refer to the page9 for the

　oiling position.

2/14

PARTS LIST

Cal.4R57A

(Back side)

Type of oil Oil quantity mark

S-6 NORMAL QUANTITY

S-4 SUFFICIENT QUANTITY

AO-3 (Moebius A)

0970 102

Date star

1001 128

0802 036 Date corrector setting unit

Date driving wheel

0810 164

Date jumper

0737 021

Date corrector setting wheel

0012 310

Auxiliary main plate screw

0102 190

Auxiliary main plate

0273 245

Hour wheel

0261 183

Lower shock absorbing spring Minute wheel and pinion

0225 438

Lower shock absorbing jewel Cannon pinion

0962 190

Lower hole jewel

for shock-absorber

3/14

Cal.4R57A

(Back side)

PARTS LIST

Date corrector setting

transmission wheel B

62-1

62-2

(Back side)

62-3

Type of oil Oil quantity mark

S-6 NORMAL QUANTITY

S-4 SUFFICIENT QUANTITY

AO-3 (Moebius A)

Oscillating weight

・Refer to page 7 for each parts code

・Refer to the page11 for

assembling position

0012 354

0012 420 0191 183

Balance cock screw Automatic train bridge

0171 354 0514 183

Balance cock

0012 919

Ratchet wheel screw

0285 051

Ratchet wheel

0012 354

Pallet bridge screw

0161 300

0310 185 Pallet bridge

Balance complete

with stud 0301 009

Pallet fork

Upper shock absorbing spring

Upper hole jewel for shock-absorber

4/14

Automatic train bridge screw

32-1

Upper shock absorbing jewel

PARTS LIST

Cal.4R57A

32-3

31 27

32-2

Second reduction wheel and pinion

32 28

32-4

whole tooth

Type of oil Oil quantity mark

AO-3 (Moebius A) S-6 NORMAL QUANTITY

S-4 SUFFICIENT QUANTITY

0012 420

0511 010 Cap jeweled spring

First reduction wheel

・Refer to page 8 for the oiling position Cap jewel

・Refer to page 10 for

Disassembling/Reassembling

0831 183 0363 184

Pawl lever

・Refer to the page11 for assembling

0114 183

Barrel and train wheel bridge

・Refer to page 8 for the oiling position

0836 002

Reduction wheel holder

0436 166

Lower plate for barrel and train

wheel bridge

0012 354

0144 245 Lower plate for barrel and train

Fourth wheel and pinion wheel bridge screw

0231 070

Third wheel and pinion

0012 354

Center wheel bridge screw

0122 164

Center wheel bridge

5/14

Ratchet sliding wheel spring

37-1

37-2

PARTS LIST

Barrel and train wheel bridge screw

Cal.4R57A

Type of oil Oil quantity mark

S-6 NORMAL QUANTITY

S-4 SUFFICIENT QUANTITY

AO-3 (Moebius A)

0224 438

Center wheel with cannon pinion

0381 004

Click

0201 287

Barrel complete

0251 300

Escape wheel and pinion 0012 168

Yoke spring screw

0388 177

Yoke spring

0384 183

Yoke

0383 185

0601 183 Setting lever

Stop lever

・Refer to page 9 for

the oiling position 0282 183

Clutch wheel

0283 020

Winding pinion

0962 183

Date corrector setting

transmission wheel A

0351 200

Winding stem

Main plate

6/14

Cal.4R57A

PARTS LIST

Type of oil Oil quantity mark

S-6 NORMAL QUANTITY

S-4 SUFFICIENT QUANTITY

AO-3 (Moebius A)

Oscillating weight with ball bearing

●

List of screws

*All parts code are subject to change without notice.

7/14

Cal.4R57A

Lower plate for

barrel and train

wheel bridge screw

Auxiliary train wheel

bridge screw (×4)

Balance bridge

screw

Pallet bridge screw

(×2)

PARTS LIST

Barrel and train

wheel bridge screw

　　　　　　　　　　(×3)

Automatic train

bridge screw (×2)

0012 100

Parts No

Name

0012 354

0012 919 Center wheel bridge

screw

Name Parts No

29 Ratchet wheel screw

1509　194

Parts code Marking

1509　193 Japan mark

0012 168

Yoke spring screw

(×2)

Auxiliary main plate

screw

0012 310

1.Oiling spot

Barrel and train wheel bridge

[Top side]

[Back side]

Note：

After oiling *2 , set Lower plate for barrel and train wheel bridge & screw.

Lower plate for barrel and train wheel bridge

Lower plate for barrel and train wheel bridge screw

After oiling *4 , set First reduction wheel & Pawl lever & Reduction wheel holder.

First reduction wheel

Pawl lever

Reduction wheel holder

8/14

Cal.4R57A

TECHNICAL GUIDE

(1)

*2 *3

Type of oil Oil quantity mark

S-6 NORMAL QUANTITY

S-4 SUFFICIENT QUANTITY

AO-3 (Moebius A)

Planet unit

Second sun wheel

Notes:

*2 Oil to between the Arbor pinion and the Gear.

Sun and planet unit

Sun wheel

Stop lever

Main plate

Contact part of Main plate and Stop lever

9/14

(3)

TECHNICAL GUIDE

Cal.4R57A

(2)

Type of oil Oil quantity mark

S-6 NORMAL QUANTITY

S-4 SUFFICIENT QUANTITY

AO-3 (Moebius A)

2. Disassembling / Reassembling of the First reduction wheel

First reduction wheel

Reduction wheel holder

Barrel and train wheel bridge (back side)

3. Disassembling / Reassembling of the Cannon pinion

Cannon pinion

10/14

<< Disassembling >>

Cal.4R57A

Push

<< Reassembling >>

TECHNICAL GUIDE

<< Disassembling >> << Reassembling >>

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