Seiko 4F32A, 8F33A, 8F35A, 8F32A Technical Manual

1

PARTS CATALOGUE / TECHNICAL GUIDE

[SPECIFICATIONS]

Cal. No.

Item

4F32A 8F35A

Movement

8F32A

8F33A

(x 1.0)The illustrations refer to Cal. 8F32A.

Movement
size

ø18.5 mm

17.7 mm x

18.5 mm

ø26.4 mm

25.6 mm x 25.6 mm

ø18.5 mm

17.1 mm x

18.5 mm

ø26.4 mm

24.8 mm x 24.8 mm

Time indication 3 hands (hour, minute and second hands)

Outside diameter

Casing diameter

Height

)

Including the

battery portion

(

3.9 mm 4.3 mm

Driving system

Additional mechanism

Loss/gain Annual rate at normal temperature range: less than 20 seconds
Regulation system

Logical regulation (Pattern cutting system: 3 steps)

Measuring gate by quartz tester Use 10-second gate.

SEIKO CR1612

Battery

Battery No

SEIKOBR2412

Voltage 3.0 V

Battery life Approx. 5 years

Approx. 8 yearsApprox. 10 years

Jewels 4 jewels

Cal. 4F32A, 8F32A
Cal. 8F33A, 8F35A

PARTS CA TALOGUE / TECHNICAL GUIDE (p. 1 – 22)

CATÁLOGO DE PARTES / GUÍA TÉCNICA (p. 23 – 44)

• Step motor (for hour, minute and second hands)

• Ultrasonic motor (for calendar indication)

• Calendar (Leap year indication, month and date)
Perpetual calendar up to February 28, 2100

• Train wheel setting device

• Electronic circuit reset switch

• Battery life indicator

• Day calendar (Cal. 8F33A)

• Instant calendar (day) setting device (Cal. 8F33A)

(Revised: 2008 Apr.)

.

Revision: 2008.4

2

PARTS CATALOGUE

Disassembling procedures Figs. : 1 → 43
Reassembling procedures Figs. : 43 ← 1
Lubricating: Types of oil Oil quantity

Moebius A No

rmal quantity

Moebius F

➡➡

Please see the remarks on the following pages.

Cal. 4F32A, 8F32A, 8F33A, 8F35A

Ex. : Cal. 8F32A

Note for Cal. 8F32A and 8F35A:
When the hands and the dial

are removed, the dial spacer
wi

ll come off if the movement
is turned over. Take care not
to

lose the dial spacer.

0016 704

• Circuit block cover screw (4 pcs.)

•

Train wheel bridge screw (2 pcs.)

00

16 705

•

Ultrasonic motor screw (2 pcs.)

2 Battery

(See the front page)

5 4216 115 (Cal. 4F32A)

4216 117 (Cal. 8F32A,

8F33A and 8F35A)

In

sulator for battery (A)

6 0016 704

Ci

rcuit block cover screw

7

Circuit block cover

8 4003 424 (Cal. 4F32A)

4003 425 (Cal. 8F32A,

8F33A and 8F35A)

Circuit block

10 4281 119

24-hour contact point
spring

11 4270 415

Battery connection (–)

12 4216 116

Insulator for battery (B)

9 4281 115

Date driving contact
po

int spring

*For disassembling and reassembling,

use the movement holder for exclusive

use with the respective calibres.

*For the dial side:

•

Movement holder 4F3-T
for Cal. 4F32A

•

Movement holder 8F3-T

for Cal. 8F32A, 8F33A and 8F35A

*For the case back side:

•Movement holder 4F8F-C
for all Cal. 4F and 8F Series

( + )

( - )

Insulator for battery(B) (white)

2 Battery

5 Insulator for battery (A)

A battery with 5 Insulator for

battery (A) (red) may be installed in
some models. Discard this type of
battery after replacing it with a new

battery of the latest model, to which

the insulator for battery (white) is

attached.

3

PARTS CATALOGUE

➡➡

Please see the remarks on the following pages.

Cal. 4F32A, 8F32A, 8F33A, 8F35A

Ex. : Cal. 8F32A

23 4239 115

Rotor stator

24 0261 115 (Cal. 4F32A, 8F32A and 8F33A)

0261 046 (Cal. 8F35A)
Minute wheel and pinion

25 0383 115 (Cal. 4F32A)

0383 116 (Cal. 8F32A, 8F33A and 8F35A)
Setting lever

26 0384 115

Yoke

27 Winding stem

28 0282 032 (Cal. 4F32A and 8F32A)

0282 117 (Cal. 8F33A)
0282 116 (Cal. 8F35A)
Clutch wheel

290962 119 (Cal. 8F33A)

First intermediate wheel for calendar corrector

30 Center wheel and pinion
41 0016 705

Ultrasonic stator unit screw

42 4234 115

Ultrasonic stator unit

43 0100 136 (Cal. 4F32A)

0100 137 (Cal. 8F32A, 8F33A and 8F35A)
Main plate

13 4002 115

Coil block

14 0016 704

Train wheel bridge screw

15 0125 254

Train wheel bridge

16 Fourth wheel and pinion

17 0231 116

Third wheel and pinion

18 0701 115

Fifth wheel and pinion

19 4146 116

Step rotor

20 0281 115

Setting wheel

21 0388 117 (Cal. 4F32A)

0388 116 (Cal. 8F32A, 8F33A and 8F35A)
Yoke guard

22 0391 115

Train wheel setting lever

0282 117•(Cal. 4F32A, 8F32A,

8F33A, 8F35A)
(update: 2007/04/16)

4

PARTS CATALOGUE

➡➡

Please see the remarks on the following pages.

Cal. 4F32A, 8F32A, 8F33A, 8F35A

Cal. 4F32A, 8F32A & 8F35A

Ex. : Cal. 8F32A

Cal. 8F33A

* Cal. 4F32A, 8F32A and 8F35A do not use the parts 3 , 4 , 31 and 37 .

1 4408 116

(Cal. 8F32A and 8F35A)
Dial spacer

32 0808 126

Date dial guard

33 Date dial

34 0810 115

Date jumper

35 Hour wheel
36 0817 118

Intermediate date driving
wheel and pinion

38 4062 117

Ultrasonic rotor

39 1019 114

24-hour wheel

40 0802 115

Date driving wheel

3 0963 230

Snap for day star
with dial disk

4 Day star with

dial disk

32 0808 125

Date dial guard

33 Date dial

31 0989 007

Day corrector
wheel

38 4062 117

Ultrasonic rotor

39 1019 115

24-hour wheel

40 0802 115

Date driving
wheel

36 0817 118

Intermediate date
driving wheel and
pinion

37 0962 118

Second intermediate
wheel for calendar
corrector

35 Hour wheel

34 0810 115

Date jumper

5

PARTS CATALOGUE

Cal. 4F32A, 8F32A, 8F33A, 8F35A

Remarks:

● Back plate

Some models do not use the back plate.

● Case ring

The type of case ring is determined based on the design of cases.
Check the case number and refer to “SEIKO Casing Parts Catalogue” to choose a corresponding case ring.

4 Day star with dial disk (Only for Cal. 8F33A)

Position of crown

and calendar frame

Cal. No. Color of figurePart code

Color of

background

8F33A 0170 072 3 o’clock Black White

The type of day star with dial disk is determined based on the design of cases.
Check the part code printed on the disk.

7 Circuit block cover
16 Fourth wheel and pinion
30 Center wheel and pinion
35 Hour wheel

• Discrimination of the hand installation height

Cal. 4F and 8F Series watches have numerals printed on
movement to indicate the hand installation height. When
repairing, refer to the table below.

Circuit

block cover

Numeral for

discrimination

Center wheel

and pinion

Fourth wheel

and pinion

Hour wheel

1

4461 021 0221 116 0241 449 0273 118

2

4461 020 0221 114 0241 448 0273 117

[ Cal. 4F32A ]

Numeral for discrimination

6

PARTS CATALOGUE

Cal. 4F32A, 8F32A, 8F33A, 8F35A

[ Cal. 8F32A and 8F33A ]

Numeral for

discrimination

Center wheel

and pinion

Fourth wheel

and pinion

Hour wheel

[ Cal. 8F35A ]

Numeral for

discrimination

2

Center wheel

and pinion

Fourth wheel

and pinion

Hour wheel

0221 123

27 Winding stem 0351 196

The type of winding stem is determined based on the design of cases.

Check the case number and refer to “SEIKO Casing Parts Catalogue” to choose a corresponding
winding

stem.

33 Date dial

Position of crown

and calendar frame

Cal. No. Color of figurePart code

Color of

background

4F32A 0878 321 3 o’clock Black White

8F35A 0878 301 4 o’clock White Black

8F32A
8F33A

0878 301 3 o’clock White Black

The type of date dial is determined based on the design of cases.

Check the case number and refer to “SEIKO Casing Parts Catalogue” to choose a corresponding date
dial.

Circuit

block cover

2

0221 115

4461 022

(8F32A)

4461 024

(8F33A)

0221 114

1

4461 023

(8F32A)

4461 025

(8F33A)

Circuit

block cover

4461 033

0241 446 0273 115

0241 448

0273 116

0241 446

0273 115

(Addition: hand installation height 1, Column of Circuit block cover) 2008.04

(Addition: Column of Circuit block cover) 2008.04

7

TECHNICAL GUIDE

• The explanation here is only for the particular points of Cal. 4F32A, 8F32A, 8F33A and 8F35A.

• For the repairing, checking and measuring procedures, refer to the “TECHNICAL GUIDE, GENERAL

INSTRUCTIONS”.

I. STRUCTURE OF THE CIRCUIT BLOCK

Cal. 4F32A, 8F32A, 8F33A, 8F35A

[ Cal. 4F32A ]

[ Cal. 8F32A, 8F33A and 8F35A ]

“ø” terminal
(for resetting the date dial)

“M” terminal
(for month setting)

“Y” terminal
(for year setting)

“D” terminal
(for date setting)

AC terminal

Coil block output terminal

Input terminal (+)

C-MOS-IC

Input terminal (–)Crystal unit

“ø” terminal
(for resetting
the date dial)

“M” terminal (for month setting)

“D” terminal
(for date setting)

AC terminal

“Y” terminal
(for year setting)

Coil block output terminalInput terminal (+)

C-MOS-IC

Input terminal (–)Crystal unit

8

TECHNICAL GUIDE

II. REMARKS ON DISASSEMBLING AND REASSEMBLING

Cal. 4F32A, 8F32A, 8F33A, 8F35A

● Hour, minute and second hands

• For disassembling and reassembling, use the movement holder for exclusive use with the respective
calibres.

• When installing the hands, place the movement directly on a flat metal plate or a riveting plate.

• How to set the hands

With the battery installed, place the movement directly
on a flat metal plate or a riveting plate, taking care not
to press down the hooking portions.

To install the hands:

Turn the crown clockwise until the date changes, and install the hands so that they point to the 12 o’clock
position.

To install the hands so that the date changes more accurately as the hands indicate 12 o’clock midnight:

1) Turn the crown clockwise until the date changes.

2) Give the crown four counterclockwise turns to make the date return to the previous date.

3) Turn the crown slowly clockwise until the date changes again.

4) Install the hands so that they point to the 12 o’clock position.

• Setting position of the movement on the exclusive movement holder

Check that the pins of the movement holder are securely set to the corresponding holes of the
movement.

[ Movement holder 4F3-T for the dial side of Cal. 4F32A movement ]

[ Movement holder 8F3-T for the dial side of Cal. 8F32A, 8F33A and 8F35A movements ]

Hooking portion

Battery

Pin

Hole to set the pin

Pin

Hole to set the pin