Seiko 6T63A Kurzanleitung

PARTS CATALOGUE /TECHNICAL GUIDE

Cal. 6T63A

[SPECIFICATIONS]

Cal. No.

Item

Interval of hands movement

Driving system

Additional function

Loss/gain

Regulation system

Gate time for rate measurement

Power

supply

Battery No.

Battery voltage

Battery life

Number of jewels

1/19

Crown

operation

Normal position

1st click position

2nd click position

Current consumption

Coil resistance

1 second

0 jewel

Stepping motor, 2 pieces

• Stopwatch function

60-minute stopwatch in one second increments.

• Second hand stop function

4002054 (COIL BLOCK A)

1.45 - 1.65 KΩ

Use 10-second gate.

SEIKO SR936SW

Nil

1.55 V

Approx. 3 years

6T63A

• 3 hands (hour, minute, and

small second hand)

• 24-hour indicator

• Date indicator

4002055 (COIL BLOCK B)

1.65 - 1.85 KΩ

Free

Date setting(clockwise)

Time setting, hand position adjustment / resetting the circuit

Monthly rate: Less than 20 seconds (worn on the wrist at the tempera-

ture between 5 and 35)

• Diameter

Outside: Ø 30.8 mm Casing: Ø 29.0 mm

• Height: 5.1 mm

Movement: Less than 2.70 μA

Circuit block: Less than 0.70 μA

SPECIFICATIONS

2/19

Cal. 6T63A

Cal. 6T63A has a new structure employing one crown and two buttons. The construction of chronograph

mechanism is based on Cal. 8R28 mechanical chronograph watch by using the one-piece 3 pointed reset

hammer. While other Swiss-made watches are using separate hammers which require an assembly and

adjustment of the hammers, the one-piece hammer design realizes maximum durability and stability of

the component and easier maintenance. It is also equipped with the self-alignment function for all counting

hands to return to zero positions instantaneously.

This is the multi-display analogue watch featuring a stopwatch function.

●The time is indicated by the 24-hour, hour and minute hands, and a small second hand.

●The stop watch can measure up to 60 minutes in one second increments. After 60 minutes,

it will stop automatically.

●Measurement performance

Displays the elapsed time with the 2 designated STOPWATCH hands.

Measures up to 60 minutes in one second increments.

●Button operation (Crown position: Normal position)

Button A: START/STOP

Button B: RESET

1. STOPWATCH FUNCTION

Cal. 6T63A

a b c

Hour hand

Minute hand

STOPWATCH 1/5-second hand

STOPWATCH minute

hand

Small second hand

a: Normal position

b: First click

c: Second click

24-hour hand

CROWN

When pushing the reset button

the HAMMER OPERATING LEVER

B moves automatically to

keep appropriate balance of the

HAMMER position.

CHRONOGRAPH

COUPLING LEVER

HAMMER OPERATING

LEVER A

HAMMER OPERATING

LEVER B

HAMMER HAMMER HAMMER OPERATING

LEVER B

FEATURES

START RESET

SPECIFICATIONS

3/19

Cal. 6T63A

After installing the battery, pull out the crown to the second click position. And then follow the

instructions below to correct the hand positions and set the time.

NECESSARY PROCEDURE AFTER BATTERY CHANGE

Pull out to the second click position when the small second hand is at

the 60 seconds position. The small second hand stops on the spot.

Crown

Push back in to the normal position in accordance with a time signal.

Crown

Watch starts moving with 2-second interval for 10 seconds. Wait until it moves with

1-second interval.*

* Do not move the crown before it ends.

Button B

Press Button B for longer than 2 seconds.

The STOPWATCH minute hand turns a full circle.

● Standard measurement

Button A

START →Button A

STOP →Button B

RESET

● A ccumulated elapsed time measurement

Button A

START →Button A

STOP

Button A

STOP →Button B

RESET

→Button A

RESTART …→

Restart and stop of the stopwatch can be repeated by pressing button A.

●Measurement functions

Accumulated elapsed time measurement and split time measurement are available.

Cal. 6T63A

PARTS LIST

4/19

DATE INDICATOR

MAINTAINING

PL ATE SCREW

0012354

DATE INDICATOR

MAINTAINING

PL ATE

0808052

DATE DIAL

0878***

DATE JUMPER

0810019

DATE CORRECTOR

WHEEL

0806002

INTERMEDIATE

SMALL HOUR HAND WHEEL

AND PINION

0817048

SMALL HOUR HAND WHEEL

0157***

[ Cross section ]

For parts and , please refer to the page 10.

Disassembling procedures Figs. : 1 61

Reassembling procedures Figs. : 61 1

AO-2

Type of oil Oil quantity mark

NORMAL QUANTITY

AO-3

S-6 LIBERAL QUANTITY

SMALL QUANTITY

Cal. 6T63A

PARTS LIST

5/19

HOUR WHEEL

0273***

9SWITCH LEVER

HOLDER SCREW

012354

SWITCH LEVER

HOLDER

0837005

SWITCH LEVER A

4450017

SWITCH LEVER B

4450018

DATE CORRECTOR

SETTING

TRANSMISSION

WHEEL B

0962013

DATE CORRECTOR

SETTING TRANSMISSION

WHEEL C

0962891

For parts , please refer to the page 10.

Cal. 6T63A

PARTS LIST

6/19

15 SWITCH SPRING SCREW

0016121

17 SECOND COUNTING

WHEEL FRICTION

SPRING

0353018

18 CHRONOGRAPH

BRIDGE

0190007

16 SWITCH SPRING

4250***

19 CHRONOGRAPH

COUPLING LEVER

0581007

25 TRAIN WHEEL

STOP LEVER

0894002

26 HAMMER OPERATING

LEVER A

0587004

20 HAMMER OPERATING

LEVER B

0587006

HAMMER

0585013**

15 SWITCH SPRING SCREW

0016121

SECOND

COUNTING

WHEEL

0888***

POSITIONING

ARBOR

0685002

MINUTE

COUNTING

WHEEL

0740***

For parts , please refer to the page 10 and 11.

For parts and , please refer to the page 10.

For parts , , , , and , please refer to the page 12 and 13.

25 26

2019 21

Cal. 6T63A

PARTS LIST

7/19

For parts , please refer to the page 12 and 13.

27 LOWER PLATE FOR

CHRONOGRAPH BRIDGE SCREW

0016121

28 LOWER PLATE FOR

CHRONOGRAPH BRIDGE

0186002

29 CIRCUIT BLOCK SPACER

4408149

30 CIRCUIT BLOCK

4004253

31 BATTERY CONNECTION (-)

4270336

35 SECOND COUNTER

INTERMEDIATE WHEEL

AND PINION

0885003

38 COIL BLOCK SCREW

0012354

39 COIL BLOCK A

4002054

40 STEP ROTOR

4146063

41 STATOR A

4239063

34 MINUTE COUNTER

INTERMEDIATE WHEEL

AND PINION B

0886006

36 COUNTER

INTERMEDIATE WHEEL

AND PINION

0886004

37 MINUTE COUNTER

INTERMEDIATE WHEEL

AND PINION A

0886005

42 FIFTH WHEEL AND

PINION

0701015

32 TRAIN WHEEL BRIDGE

0125316

33 MINUTE COUNTER

INTERMEDIATE WHEEL

AND PINION

0886007

Cal. 6T63A

PARTS LIST

8/19

43 RESET LEVER

4455006

50 TRAIN WHEEL

SETTING LEVER

0391028

51 COIL BLOCK SCREW

0012354

52 COIL BLOCK B

4002055

53 STEP ROTOR

4146063

54 STATOR B

4239064

57 SETTING

LEVER

0383891

58 YOKE

0384024

60 CLUTCH

WHEEL

0282452

61 DATE CORRECTOR

SETTING

TRANSMISSION

WHEEL A

0962012

59 WINDING STEM

0351177

44 THIRD WHEEL

AND PINION

0231043

45 FOURTH WHEEL

AND PINION

0144002

46 MINUTE WHEEL

AND PINION

0261026

47 SETTING WHEEL

0016121

48 CENTER WHEEL AND

PINION BRIDGE

0016121

49 CENTER WHEEL

AND PINION

0221***

55 FIFTH WHEEL

AND PINION

0701015

56 SECOND WHEEL

0240***

49 56 59

For parts , and , please refer to the page 10.

Cal. 6T63A

PARTS LIST

9/19

●Tools and consumables required for disassembling/reassembling

• Movement holder

UNIVERSAL MOVEMENT HOLDER (S-682)

• Watch oils

SEIKO watch oil AO-3 (or Moebius A) and AO-2 (or Moebius F)

AO-3

AO-2

S-6

TECHNICAL GUIDE Cal. 6T63A

10/19

●How to ﬁnd the correct parts, if not determined by 4 digit caliber number

Following parts are determined based on the design of watches, such as hands height, dial

color, and design of cases. Please refer to the SEIKO WATCH PARTS CATALOGUE in order to

choose corresponding parts.

3DATE DIAL 0878***

59 WINDING STEM 0351177

* For screw down crown models, the stem is assembled to the crown and is not available

separatelly

7 SMALL HOUR HAND WHEEL

8 HOUR WHEEL

16 SWITHCH SPRING

22 SECOND COUNTING WHEEL

24 MINUTE COUNTING WHEEL

49 CENTER WHEEL AND PINION

56 SECOND WHEEL

Please refer to the following table in order to ﬁnd the correct part number of each wheel

according to the hand installation height. The numeral 2 or 4 is printed on the DIAL.

7 SMALL

HOUR HAND

WHEEL

8 HOUR

WHEEL

16 SWITHCH

SPRING

22 SECOND

COUNTING

WHEEL

24 MINUTE

COUNTING

WHEEL

49 CENTER

WHEEL AND

PINION

56 SECOND

WHEEL

0157012 0273038 4250035 0888017 0740002 0221087 0240018

0157013 0273042 4250054 0888019 0740003 0221092 0240019

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