Seiko 4R35B Quick start guide

PARTS LIST / TECHNICAL GUIDE
Automatic Cal.4R35B／4R36A
[SPECIFICATION]
(The below figs. are for Cal.4R36A)
Driving system
Automatic winding with manual winding mechanism
・3 hands (Hour, Minute and
・3 hands (Hour, Minute and Second
Time indication Second hands) hands)
・Date indication
・Day and Date indication
・Instant date setting device ・Instant date setting device
Additional function
・Second hand stop function ・Instant day setting device
・Second hand stop function
Crown Date setting (counterclockwise)
Date setting (counterclockwise),
operation Day setting (clockwise)
Vibration per hour
21,600 (6 beats per second)
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)
Testing positions
Dial upward
6 o'clock 9 o'clock
Dial upward
at the top at 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
1/18
1st click
4R35B
4R36A
23 Jewels
24 Jewels
Daily Rate
Cal. No.
4R35B/4R36A
Item
Normal position
Manual winding (clockwise only)
Standard rate
for measurement
2nd click
Time setting (Hour and Minute) / Second hand stop function
・3 Hands (Hour, Minute and Second hands)
・Day and Date indication
Movement Size
・Diameter Outside ：φ27.4 mm
Casing ：φ27.0 mm
・Height ：5.32 mm

FEATURES
SEIKO Automatic Mechanical Cal.4R35B is replacement caliber of Cal.4R35A.
Construction of B series are the same as A series, but using new parts.
Since the size of the movement is same as A series, the complete movement can be assembled
into the watches which originally have the A series movement; however, as the parts are not
convertible, please use the appropriate parts for each caliber.
REMARKS： Parts Differences Between 4R35A series and B series
Parts Name Cal. 4R35A Cal. 4R35B
5
DATE DIAL GUARD SCREW 0016 705 0012 354
6 DATE DIAL GUARD 0808 060 0808 183
8 DATE JUMPER 0810 030 0810 183
10
GUARD FOR DAY-DATE CORRECTOR SETTING
TRANSMISSIOIN WHEEL SCREW
0012 354 0012 485
11
GUARD FOR DAY-DATE CORRECTOR SETTING
TRANSMISSIOIN WHEEL
0836 010 0836 183
12
INTERMEDIATE WHEEL FOR DATE SETTING C 0962 024 0962 185
14 DATE CORRECTOR SETTING WHEEL 0737 300 0737 183
15 HOUR WHEEL 0271 483 0273 182
16 MINUTE WHEEL 0261 006 0261 183
18
DATE INDICATOR DRIVING WHEEL 0802 300 0802 183
22 AUTOMATIC TRAIN BRIDGE 0191 032 0191 183
23
SECOND REDUCTION WHEEL AND PINION 0514 010 0514 183
32
BARREL AND TRAIN WHEEL BRIDGE 0114 348 0114 183
33 SLIDING CROWN WHEEL SPRING 0363 156 0363 183
35 PAWL LEVER 0831 077 0831 183
42
BARREL COMPLETE 0201 267 0201 083
46
CENTER WHEEL WITH CANNON PINION 0224 086 0224 183
48 SETTING LEVER JUMPER 0388 071 0388 177
49 YOKE 0384 061 0384 183
50 SETTING LEVER 0383 060 0383 183
51 STOP LEVER 0601 010 0601 183
53 CLUTCH WHEEL 0282 040 0282 183
56 MAIN PLATE 0100 493 0104 164
2/18
PARTS LIST
Cal. 4R35B / 4R36A

[ CALENDAR MECHANISM 1 ]
Snap for day star with dial disk
0963 300
Day star with dial disk
*Parts 2 , 3 and 4 are only Refer to page 8 for each parts code
used in Cal. 4R36A.
Day-date corrector wheel
0989 070
Date dial guard screw
0016/0012 ***
Date dial guard
0808 ***
Date dial
Refer to page 8 for each parts code
Date jumper
0810 ***
3/18
PARTS LIST
Cal. 4R35B / 4R36A
4
5
6
7
8
2
3
Types of oil Oil quantity
AO-3 (Moebius A) Liberal quantity
SEIKO Watch Oil S-6 Normal quantity
SEIKO Watch Oil S-4

[ CALENDAR MECHANISM 2 ]
15
Hour wheel
0271/0273 *** 9
0962 025
10 Guard for day-date corrector
16 Minute wheel and pinion setting transmission wheel
261 *** screw 0012 ***
17 Intermediate date driving
wheel and pinion Guard for day-date corrector
0817 300 setting transmission wheel
0836 ***
Date indicator driving wheel
0802 *** 12
0962 ***
Cannon pinion
0962 023
Date corrector setting wheel
0737 ***
Dial holding spacer
4408 172
0014 577
0011 220
0014 295
4/18
PARTS LIST
Cal. 4R35B / 4R36A
Intermediate wheel for date setting
E
Lower shock
absorbing
27-1
Intermediate wheel
for date setting B
Intermediate wheel
for date setting C
0225 414
13
20
27-1
19
18
Lower shock
absorbing cap jewel
27-1
Lower hole jewel frame
for shock-absorber
Types of oil
AO-3 (Moebius A)
SEIKO Watch Oil S-6
SEIKO Watch Oil S-4
*1
*1 *2
*2
*3
*3
11
14

[ BALANCE AND ESCAPEMENT]
Oscillating weight
Refer to page 8 for parts code.
Refer to page 13 for setting position.
21 Automatic train bridge screw
26 Balance cock screw 0012 354
0012 100 22 Automatic train bridge
0191 ***
23
Second reduction wheel and
pinion
27 Balance cock 0514 ***
0171 353
24 Ratchet wheel screw
0012 919
Ratchet wheel
0285 051
28 Pallet bridge screw
0012 354
29
Pallet bridge
27-1 0161 300
30 Pallet fork
0301 009
Upper shock
absorbing cap jewel
Upper hole jewel
frame for shock-absorber
5/18
PARTS LIST
Cal. 4R35B / 4R36A
27-4
0310 197
27-2
Upper shock absorbing spring
27-3
1
25
Balance complete
with stud
*1
*1
*2
*2
*3
*3
whole tooth
Types of oil
AO-3 (Moebius A)
SEIKO Watch Oil S-6
SEIKO Watch Oil S-4

[ WINDING MECHANISM]
Barrel and train wheel
36 First reduction wheel 31 bridge screw
0511 010 0012 100
Refer to page 9 for oiling spot
Refer to page 12 for disassembling/reassembling
32-1
Cap jewelled spring
0015 703
Cap jewel
35
Pawl lever
0011 221
0831 *** Sliding crown wheel spring
33 0363 ***
Refer to page 13 for disassembling
/reassembling
32 Barrel and train
wheel bridge
0114 ***
Refer to page 11 for oiling spot
Reduction wheel holder
37
0836 002 0436 164
38
Fourth wheel and pinion 0012 354
40 Third wheel and pinion
0231 070
41
Click
0381 004
42 Barrel complete
0201 ***
6/18
0241 010
32-2
PARTS LIST
Cal. 4R35B / 4R36A
34
Lower plate for barrel and
train
Lower plate for barrel and
train
39
*1
*1
Types of oil
AO-3 (Moebius A)
SEIKO Watch Oil S-6
SEIKO Watch Oil S-4

[SETTING MECHANISM]
43 Center wheel bridge screw
0012 354
44 Center wheel bridge
0122 302
45 Escape wheel and pinion
0251 300
46 Center wheel and pinion
0224 ***
47 Setting lever jumper screw
0012 168
48
Setting lever jumper
0388 ***
49 Yoke
0384 ***
50
Setting lever
0383 ***
51 Stop lever
0601 ***
Refer to page 12 for oiling spot
Clutch wheel
0282 ***
Winding pinion
0283 020
55
Day-Date corrector
setting transmission
Winding stem
0351 200
Refer to Page 12
Main plate
for disassembling.
52
0100/0104 ***
7/18
Cal.4R35B/4R36A
53
54
wheel A
PARTS LIST
56
0962 183
*1*1
*2
*2
*3
*3
*4
*4
whole tooth
*5
*5
Types of oil
AO-3 (Moebius A)
SEIKO Watch Oil S-6
SEIKO Watch Oil S-4

REMARKS
●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.
1OSCILLATING WEIGHT 050 ***
The type of OSCILLATING WEIGHT is determined based on the design of cases. Check the case
number and refer to the "SEIKO WATCH PARTS CATALOGUE" to choose the corresponding
OSCILLATING WEIGHT.
3DAY STAR WITH DIAL DISK (Cal.4R36)
:
:
:
The above DAY STAR WITH DIAL DISK is used when both the crown and the day frame are located
at 3 o'clock. When ordering any other type of the DAY STAR WITH DIAL DISKs, cleary mention the
the number printed on the disk.
7
DATE DIAL (Cal.4R35B / 4R36A) 0878 ***
The type of DATE DIAL is determined based on the design of cases. Check the case number and refer
to the "SEIKO WATCH PARTS CATALOGUE" to choose corresponding DATE DIAL.
52 WINDING STEM 0351***
The type of Winding Stem is determined based on the design of cases. Check the case number and
refer to "SEIKO WATCH PARTS CATALOGUE" to choose corresponding Winding Stem.
8/18
Blue
SUN
Red
0160 242
3H
3H
MON～FRI
Black
White
SAT
PARTS LIST
Cal. 4R35B / 4R36A
Parts code
Crown
position
Date
position
Color of figure
Color of
background

●How to identify the parts
Wheel
Screws
●LOCATION OF THE JEWELS
Barrel complete
9/18
Total
Cal. 4R35B: 23 jewels/Cal. 4R36A: 24jewels
Entry pallet jewel
○
Exit pallet jewel
○
Roller jewel
○
Second reduction wheel & pinion
○
○
First reduction wheel & arbor
○
○
Crown wheel
○
Balance spring
○
○
○
○
○(for Cal.4R36A)
Pallet fork
○
○
Escape wheel & pinion
○
○
○
Third wheel & pinion
○
○
○
Forth wheel & pinion
○
Cap Jewel
Center wheel & pinion
○
○
15
4R35B
0273 182
Hour wheel
4R36
0273 183
No
Cal.
Parts code
38
Lower plate for
barrel and train
wheel bridge screw
31
Barrel and train
wheel bridge screw
(×3)
43
Center wheel bridge
screw
Parts form
Parts No
Name
Parts No
Name
0012 485
10
Guard for day-date
corrector setting
transmission
wheel screw (×2)
5
Date dial guard
screw (×4)
0012 354
Upper
Lower
Hole Jewel
Cap Jewel
Hole Jewel
PARTS LIST
Cal. 4R35B / 4R36A
Parts No
Name
0012 919
24
Ratchet wheel
screw
21
Automatic train wheel
bridge screw (×2)
28
Pallet bridge screw
(×2)
0012 168
47
Setting lever
jumper screw
(×2)
0012 100
26
Balance cock
screw

● 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
10/18
PARTS LIST
Cal. 4R35B / 4R36A

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
11/18
TECHNICAL GUIDE
Cal. 4R35B / 4R36A
32
37
38
36
36
35
34
*1 Enlarged
view
*1
Types of oil AO-3 (Moebius A)
SEIKO Watch Oil S-6
SEIKO Watch Oil S-4
*2
*3 *2
*4
Enlarged
view
*3
*4

Stop lever
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
12/18
Cal. 4R35B / 4R36A
36
<< Disassembling >>
<< Assembling >>
33
31
29
50
52
TECHNICAL GUIDE
A

4. Disassembling / assembling of the Sliding crown wheel spring
Sliding crown wheel spring
Barrel and train wheel bridge
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
13/18
<< 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.
TECHNICAL GUIDE
Cal. 4R35B / 4R36A
33
32
PUSH
Enlarged
view

●How to remove and install the Balance complete with stud
How to remove How to install
1. Initial phase 1. Initial phase
Move the stud support toward the arrow marked Set a new balance complete with stud to the
direction until it touches the balance cock. main plate.
2. Make sure that the outer coil is not removed from
2. Set the Balance cock and tighten the balance
the regulator arm. cock screw.
3. Using sturdy tweezers, push the stud outward 3. Temporarily set the stud to the stud support.
from the direction of the arrow shown in the
Make sure that the balance spring passes outside
illustration until it is removed from the stud support. the regulator pin.
* Be careful not to damage the balance spring.
4. Using sturdy tweezers, set the stud to the stud
support and press it down.
Make sure that the outer coil passes through
the regulator pin slot.
* Be careful not to damage the balance spring.
4. Unscrew the Balance cock screw and remove the
Balance cock.
14/18
TECHNICAL GUIDE
Cal. 4R35B / 4R36A

●How to regulate the isochronous fault by adjusting the position of the balance-spring
This caliber has the Etachron system for fine regulation of the isochronous fault.
The watch shows a gain trend as amplitude decreases and loses time badly near the end of its useful power reserve.
The isochronous fault can be adjusted easily by turning the Regulator pin to make the gap in the slot
either larger or smaller.
1) Make sure that the Regulator pin is aligned in a vertical position to the Regulator and the
balance-spring passes parallel through the slot of the Regulator pin before fine-tuning the STUD
and the Regulator pin.
REGULATOR PIN
2) Rotate the STUD in order to align the position of the balance-spring passes through the center of
the slot of the Regulator pin.
3) Rotate the REGULATOR PIN counterclockwise in order to fine-tune the clearance of
the balance-spring passing through the slot of it. Set it to moderate gap to get the stable trend.
REGULATOR PIN
Top side view
Back side view
TECHNICAL GUIDE
Cal. 4R35B / 4R36A
Top side view
Back side view
Angled view
STUD
REGULATOR PIN
15/18
Top side view
Back side view
Before rotating
After rotating
Before rotating
After rotating
(Maximum clearance)
(Minimum clearance)

【4R35B / 4R36A Operation Manual】
4R35B 4R36A
1. How to manually wind the mainspring by turning the crown
1) Unlock the crown by turning it counterclockwise.
2) Slowly turn the crown clockwise to wind the mainspring.
3) Continue to turn the crown until the mainspring is sufficiently wound. The second hand will start moving.
4) Lock the crown by turning it clockwise while pressing it.
2. How to set the time and date (4R35B)
1) Unlock the crown by turning it counterclockwise.
2) Pull out the crown to the first click. (The second hand continues moving.)
3) Turn the crown counterclockwise until the previous day's date appears.
Ex.) If today is the 6th of the month, first set the date to "5" by turning the crown counterclockwise.
4) Pull out the crown to the second click when the second hand is at the 12 O'clock position.
(The second hand stops on the spot.) Turn the crown to advance the hands until the date changes to the next. 
The time is now set for the A.M. period. Keep advancing the hands to set the correct time.
5) Push the crown back in to the normal position in accordance with a time signal.
6) After setting the time, push the crown into and while the crown is depressed, turn it clockwise to lock it in place.
3. How to set the time, day and date (4R36A)
1) Unlock the crown by turning it counterclockwise.
2) Pull out the crown to the first click. (The second hand continues moving.)
3) Turn the crown counterclockwise until the previous day's date appears.
Ex.) If today is the 6th of the month, first set the date to "5" by turning the crown counterclockwise.
4) Turn the crown clockwise until the previous day of the week in the desired language appears.
5) Pull out the crown to the second click when the second hand is at the 12 O'clock position.
(The second hand stops on the spot.) Turn the crown to advance the hands until the date changes to the next. 
The time is now set for the A.M. period. Keep advancing the hands to set the correct time.
6) Push the crown back in to the normal position in accordance with a time signal.
7) After setting the time, push the crown into and while the crown is depressed, turn it clockwise to lock it in place.
<CAUTION>
・Do not set the date or the day between 9:00 p.m. and 1:00 a.m.
If you do, the date or the day may not change properly / it may cause a malfunction.
・The mechanism of mechanical watches is different from that of quartz watches.
When setting the time, be sure to turn back the minute hand a little behind
the desired time and then advance it to the exact time.
16/18
OPERATION MANUAL
Cal. 4R35B / 4R36A

TECHNICAL GUIDE Cal. 4R35B / 4R36A
●Water resistance test
Check the water resistance according to the designated specification of the watch
Marking on the case back Test method Applied pressure
WATER RESISTANT(WATER RESIST) 3 BAR
WATER RESIST 5BAR 5 BAR
WATER RESIST 10BAR 10 BAR
WATER RESIST 15BAR 15 BAR
WATER RESIST 20BAR 20 BAR
SCUBA DIVERIS （AIR DIVERIS）150 m 18.75 BAR ＝150(m)times 0.125
SCUBA DIVERIS (AIR DIVERIS)200 m
25 BAR ＝200(m)times 0.125
He-GAS DIVERIS 300 m
37.5 BAR ＝300(m)times 0.125
He-GAS DIVERIS 600 m
75 BAR ＝600(m)times 0.125
He-GAS DIVERIS1000m
125 BAR ＝1000(m)times 0.125
17/18
Air leak test
Water pressure test
Condensation test
Condensation test
Condensation test
Water pressure test

TECHNICAL GUIDE
Cal. 4R35B / 4R41A
●Accuracy test
Measure the rate in three different positions within 30 minutes after the watch is fully wound up (wait
approximately for 5 minutes after winding up in order to get a stable oscillation of the balance) and
make sure the value shows within the range in the table below.
Measure the rate in dial-up position after 24 hours from fully wound up (T24) and check the rate
difference with the rate in dial-up position when it is fully wound up (T0). Make sure that the value of
T24-T0 shows within the range of the isochronism in the table below.
Instantaneous rate at T0 Isochronous fault
（Fully would condition)
Testing positions
Dial upward 6 o'clock 9 o'clock Dial upward
at the top at the top
Measurement
(Daily rate in
± 20 s/d ± 30 s/d ± 30 s/d ±30 s/d
seconds：s/d）
● Accuracy of Mechanical Wataches
✤
The accuracy of mechanical watches is indicated by the daily rates of one week or so.
✤
✤
✤
✤When affected by external strong magnetism, a mechanical watch may loss/gain time temporarily.
● Duration time test
Check the Power reserve of the watch after the mainspring is fully wound up and leave it oon natural
10/16
condition with the dial-up position. Make sure that the watch runs approximately 41 hours until it stops.
18/18
Standard rate
for measurement
The accuracy of mechanical watches may not fall within the specified range of time accuracy because
of loss/gain changes due to the conditions of use, such as the length of time during which the watch is
worn on the wrist, arm movement, whether the mainspring is wound up fully or not, etc.
The key components in mechanical watches are made of metals which expand or contract depending
on temperatures due to metal properties. This exerts an effect on the accuracy of the watches.
Mechanical watches tend to lose time at high temperatures while they tend to gain time at low
temperatures.
In order to improve accuracy, it is important to regularly supply energy to the balance that controlsthe
speed of the gears. The driving force of the mainspring that powers mechanical watches varies
between when it is fully wound and immediately before it is unwound. As the mainspring unwinds, the
force weakens.
Relatively steady accuracy can be obtained by wearing the watch on the wrist frequently for the
selfwinding type and winding up the mainspring fully everyday at a fixed time to move it regularly for the
wind-up mechanical type.
The parts of the watch may become magnetized depending on the extent of the effect. In such a case,
consult the retailer from whom the watch was purchased since the watch requires repair, including
demagnetizing.