Seiko 4R Series Manual de usuario

PARTS LIST / TECHNICAL GUIDE

Automatic Cal.4R71A

[SPECIFICATION]

　Driving　system

Automatic winding with manual winding mechanism

Additional function

・Second hand stop function

Crown

operation

Vibration per hour

21,600 (6 beats per second)

Daily Rate Between +45 and -35 seconds per day

(worn on the wrist at temperature range between 5°C and 35°C)

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 ±　20 s/d ±　30 s/d ±　30 s/d 　±30 s/d

　　seconds：s/d）

Regulation system ETACHRON system

Lift angle of the escapement 53°

　Power　reserve

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

Number of Jewels 24 Jewels

1/16

1st click

Time setting / Second hand stop function

Cal. No.

4R71A

Item

Normal position

Manual winding (clockwise only)

・3 Hands (Hour, Minute and Second hands) Movement Size

・Diameter Outside ：φ27.4 mm

Casing ：φ27.0 mm

・

Height

：

5.32 mm

0012 354

Hour wheel guard screw

0376 199

Hour wheel guard

0273 185

Hour wheel

0261 190

Minute wheel and pinion

0225 426

Cannon pinion

2/16

Lower shock

absorbing cap jewel

42-3

Lower hole jewel frame

for shock-absorber

42-2

Cal. 4R71A

42-1

Lower shock

absorbing spring

PARTS LIST

Type of oil

AO-3(Moebius A) S-6

S-4

Oil quantity mark

NORMAL QUANTITY

SUFFICIENT QUANTITY

1509 199

Oscillating weight with ball bearing

0012 354

Automatic train bridge screw

0012 100

Balance cock screw

0191 183

Automatic train bridge

0514 183

Second reduction wheel and pinion

0171 353

0012 919

Balance cock

Ratchet wheel screw

0285 051

Ratchet wheel

0012 354

Pallet bridge screw

0161 300

Pallet bridge

0310 184

0301 009

Pallet fork

3/16

Upper shock absorbing spring

13-2

Upper shock absorbing

cap jewel

13-3

Upper hole jewel frame for

shock-absorber

Balance complete

with stud

13-1

Cal. 4R71A

PARTS LIST

whole tooth

Type of oil

AO-3(Moebius A) S-6

S-4

Oil quantity mark

NORMAL QUANTITY

SUFFICIENT QUANTITY

23 0511 010

First reduction wheel 0012 100

Refer to page 8 for oiling spot

Refer to page 9 for disassembling/

assembling

Cap jewelled spring

Cap jewel

0831 183

Pawl lever 0363 184

Sliding crown wheel spring

Refer to page 10 for disassembling/

assembling

0114 183

Refer to page 8 for oiling spot

0836 002

Reduction wheel holder 0436 166

0144 185 0012 354

Fourth wheel and pinion

0231 070

Third wheel and pinion

0381 004

Click

0201 083

Barrel complete

4/16

Lower plate for barrel and train

wheel bridge

Lower plate for barrel and train

wheel bridge screw

PARTS LIST

Barrel and train wheel bridge

with hole jewel frame

Cal. 4R71A

Barrel and train wheel bridge screw

19-1

19-2

Type of oil

AO-3(Moebius A) S-6

S-4

Oil quantity mark

NORMAL QUANTITY

SUFFICIENT QUANTITY

0012 354

Center wheel bridge screw

0122 302

Center wheel bridge

0251 300

Escape wheel and pinion

0224 205

Center wheel and pinion

0012 168

Setting lever jumper screw

0388 177

Setting lever jumper

0384 184

Yoke

0383 186

Setting lever

0601 183

Stop lever

Refer to page 9 for oiling spot

0282 183

Clutch wheel

0283 020

Winding pinion

0351 200

Winding stem

Refer to page 9

Main plate for disassembling

5/16

Cal. 4R71A

PARTS LIST

*2 *3

whole tooth

Type of oil

AO-3(Moebius A) S-6

S-4

Oil quantity mark

NORMAL QUANTITY

SUFFICIENT QUANTITY

●LIST OF SCREWS

Automatic train wheel

bridge screw (×2)

●LOCATION OF THE JEWELS

6/16

Total

24 jewels

Entry pallet jewel

○

Exit pallet jewel

○

Roller jewel

○

Second reduction wheel & pinion

○

First reduction wheel

○

Crown wheel

○

Balance spring

○

Pallet fork

○

Barrel complete

○

Escape wheel & pinion

○

Third wheel & pinion

○

Forth wheel & pinion

○

Center wheel & pinion

○

0012 100

Upper

Lower

Hole Jewel

Cap Jewel

Hole Jewel

Cap Jewel

Balance cock

screw

Barrel and train

wheel bridge screw

　　　　　　　　　　(×3)

PARTS LIST

0012 354

Ratchet wheel screw

Hour wheel guard

screw　　　　(×3)

0012 919

Lower plate for

barrel and train

wheel bridge screw

Center wheel bridge

screw

Pallet bridge screw

(×2)

Parts No

Setting lever jumper

screw

(×2)

0012 168

Cal. 4R71A

Name

Parts No

Name

Parts No

●　Tools and consumables required for disassembling/reassembling

●Movement holder

UNIVERSAL MOVEMENT HOLDER

(S-682)

●Watch oils

SEIKO Watch grease S-6 and S-4. Watch oil AO-3 (or Moebius A)

S-6 AO-3

S-4

7/16

Cal. 4R71A

PARTS LIST

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 First reduction wheel

Pawl lever

Reduction wheel holder

8/16

Cal. 4R71A

TECHNICAL GUIDE

*1 *1

*2 *3

Type of oil

AO-3(Moebius A) S-6

S-4

Oil quantity mark

NORMAL QUANTITY

SUFFICIENT

QUANTITY

Stop lever

Main plate

Contact part of main plate and balance stop lever

2. Disassembling / assembling of the First reduction wheel

First reduction wheel

Reduction wheel holder

Barrel and train wheel bridge (back side)

3. Disassembling of the winding stem

1) Set the winding stem to the normal position

2) Pull out the winding stem, while pushing "A"

Setting lever

Winding stem

9/16

Cal. 4R71A

<< Disassembling >>

<< Assembling >>

TECHNICAL GUIDE

4. Disassembling / assembling of the Sliding crown wheel spring

Sliding crown wheel spring

Barrel and train wheel bridge with hole jewel frame

5. Setting position of Oscillating weight

When fixing the Oscillating weight, an alignment with the First reduction wheel is necessary

in order to wind the Mainspring most efficiently. Rotate the First reduction wheel manually until

its hole aligns with the gilt dot on the Balance cock and set the Oscillating weight vertically at

the stem side, and then tighten the screw. Refer to the figure below.

Balance cock guide pin First reduction wheel gear

10/16

<< Disassembling >>

<< Assembling >>

Set the part to the Barrel and train wheel bridge and

push the hook from the top with tweezers so that it will

be engaged securely.

Remove the hook of the Sliding crown wheel spring

from the Barrel and train wheel bridge with hole jewel

frame.

Cal. 4R71A

TECHNICAL GUIDE

PUSH

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