Seiko 4R15A Quick start guide

PARTS LIST /TECHNICAL GUIDE
Automatic Cal. 4R15A/4R15B/4R16A/4R16B
[SPECIFICATIONS]
1/19
Item Cal. No. 4R15A/4R15B/4R16A/4R16B
22 jewels
Automatic winding
Between -35 and +45 seconds
Automatic winding function
* Day and date correction function
*Day and date correction
Time setting (Hour and minute)
Free
  
    
   
   
 
  
    







Measurement
(daily rate in






  

Movement
[Bridge side] [Calendar side]
Movement size
53 °
Daily rate worn
   

 
5 °C and 35 °C)
Standard rate
for measure-
ment 

 
T24 (CH)


   
from fully wind

 
 
Driving system
Additional function
Crown operation
Loss/Gain
Regulation system
Number of jewels



Lift angle of the escapment
Vibration per hour
Continuous operating time

SPECIFICATIONS
2/19
Cal. 4R15A/4R15B/4R16A/4R16B


  
  
 
 
FEATURES
CHARACTERISTICS OF A MECHANICAL WATCH
 
  
 
  
 
 
 
 
 




PARTS LIST Cal. 4R15A/4R15B/4R16A/4R16B
3/19
  


PARTS DIFFERENCES BETWEEN A SERIES AND B SERIES

4R15A  4R15B  B
5  

 
DATE DISK (4R15) *

- -
DATE DISK (4R15) *

-

-
DATE DISK (4R15) *

-

-
 - -
 - -

 
9

 
 
 
12 
 
13 
 
 
 
 
   
35 

 
 
 
45 -

 
 

 
54 
 
55 
 
 
 
 
 
 

Cal. 4R15A/4R15B/4R16A/4R16B
PARTS LIST
4/19
0963300
SNAP FOR DAY DISK
0160***
2
DAY DISK WITH DAY STAR
0989070
3
DAY CORRECTOR WHEEL
0012354
4
DATE DISK GUARD
SCREW A (3pcs)
CAL A: 0016705
CAL B: 0012354
5
DATE DISK GUARD SCREW B (1 pce)
CAL A: 0808300
CAL B: 0808310
6
DATE DISK GUARD
7DATE DISK
CAL A: 0810030
CAL B: 0810183
8
DATE JUMPER
CAL A: 0737300
CAL B: 0737183
9
CALENDAR CORRECTOR
SLIDNG INTERMEDIATE
WHEEL
CAL A: 0271483
CAL B: 0273183
10
HOUR WHEEL
0817300
11 INTERMEDIATE DATE
WHEEL
CAL A: 0802300
CAL B: 0802183
12
DATE DRIVING WHEEL
13
MINUTE WHEEL
0225005
CANNON PINION
4408170
14
HOLDING RING FOR DIAL
0012420
LOWER BRIDGE FOR THIRD
WHEEL SCREW
CAL A: 0436300
CAL B: 0436183
16
LOWER BRIDGE FOR THIRD
WHEEL
1
SHOCK ABSORBER
17 0014577
SHOCK ABSORBING
SPRING
0011220
SHOCK ABSORBING CAP
JEWEL
19 0014295
HOLE JEWEL FRAME FOR
SHOCK ABSORER
50 -2
15
18
0878*** or 0148***
CAL A: 0267006
CAL B: 0261183
[CALENDAR MECHANISM]

214 

         
        
             
             
    
    

PARTS LIST Cal. 4R15A/4R15B/4R16A/4R16B
5/19
[BALANCE AND ESCAPEMENT] [WINDING MECHANISM (1)]
BALANCE COCK
SCREW
0012420
BALANCE COCK WITH
REGULATOR
0171197
BALANCE COMPLETE
0310197
PALLET COCK SCREW
0012354
PALLET COCK
0161302
PALLET FORK
0301009
OSCILLATING WEIGHT
CAL A: 0436300
CAL B: 0436183
SECOND REDUCTION
WHEEL SCREW
0012539
RACHET WHEEL SCREW
0012919
RACHET WHEEL
0285051
SECOND REDUCTION
WHEEL
0514002
29
30
31
32
33
21
22
23
24
20
SHOCK ABSORBER
25 0014577
SHOCK ABSORBING SPRING
0011220
SHOCK ABSORBING CAP
JEWEL
27 0014295
HOLE JEWEL FRAME
FOR SHOCK ABSORER
26
28






 

 


Cal. 4R15A/4R15B/4R16A/4R16B
PARTS LIST

CLICK
0381004
FOURTH WHEEL
0241010
BARREL COMPLETE
(WITH MAINSPRING)
CAL A: 0201267
CAL B: 0201164
THIRD WHEEL
0231007
ESCAPE WHEEL
0251013
CENTER WHEEL BRIDGE
SCREW
0012354
CENTER WHEEL BRIDGE
0122302
CENTER WHEEL WITH
CANNON PINION
CAL A: 0224086
CAL B: 0224183
SETTING LEVER JUMPER
SCREW
0012168
SETTING LEVER JUMPER
0388177
YOKE
0384070
SETTING LEVER
CAL A: 0383070
CAL B: 0383178
CLUTCH WHEEL
CALENDAR CORRECTOR
1ST INTERMEDIATE WHEEL
0962008
SETTING STEM
0351***
BARREL AND TRAIN WHEEL
0012420
BRIDGE SCREW
BARREL AND TRAIN WHEEL
BRIDGE
CAL A: 0112388
CAL B: 0114178
FIRST REDUCTION
WHEEL
0511010
PAWL LEVER
CAL A: 0831077
CAL B: 0831183
FIRST REDUCTION WHEEL
HOLDER
0836002
MAIN PLATE
CAL A: 0100326
CAL B: 0104181
36
48
43
47
49
50
52
53
54
55
56
57
58
37
38
34
35
41
42
39
40
HOLD SPRING FOR
ESCAPE WHEEL
0015703
CAP JEWEL FOR ESCAPE WHEEL
0011220
HOLD SPRING FOR
THIRD WHEEL
0015703
CAP JEWEL FOR THIRD WHEEL
0011220

44
45

50 -1
CENTER WHEEL
0221086
50 -2
CANNON PINION
0225005
CAL A: 0282070
CAL B: 0282183
[WINDING MECHANISM (2), GEAR TRAIN MECHANISM AND SETTING MECHANISM]
   refer to
 

PARTS LIST Cal. 4R15A/4R15B/4R16A/4R16B

 
 
REMARKS
14 
 
 

4408170 4408171
●How to find the correct parts, if not determined by 4 digit caliber number
2    
 


 
             
                


Cal. 4R15A/4R15B/4R16A/4R16B
PARTS LIST

● How to discrimianate resembled parts
   
 
0012 919
0012 539
0012 354
0016 705
0012 420
0012 168
21 Second reduction
  
 
  
 
screw
4 Date dial guard
screw A
  
  
 
 
  
   
  
 
34 Barrel and train
  

PARTS LIST Cal. 4R15A/4R15B/4R16A/4R16B
9/19





Balance



Balance (roller jewel)
Total

  

  
22 jewels
Location of the jewels

Cal. 4R15A/4R15B/4R16A/4R16B
PARTS LIST

●Tools and consumables required for disassembling/reassembling
• MoveMent holder
 
• Watch oils
 
 
S-4