Seiko 4R Series User manual

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
*1
*2
*1
1
2
3
4
5
*2
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
8
Upper hole jewel frame for
shock-absorber
16
13
10
11
14
9
Balance complete
with stud
17
13-1
15
12
Cal. 4R71A
6
7
PARTS LIST
*1
*1
*2
*3
*3
*2
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
25
Lower plate for barrel and train
wheel bridge
26
24
Lower plate for barrel and train
wheel bridge screw
27
28
29
22
20
PARTS LIST
Barrel and train wheel bridge
with hole jewel frame
21
19
Cal. 4R71A
18
Barrel and train wheel bridge screw
19-1
19-2
*1
*1
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
42
39
41
40
38
Cal. 4R71A
30
31
32
33
34
35
36
37
PARTS LIST
*1
*2 *3
*4
*2
*3
*4
*1
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
12
Upper
Lower
Hole Jewel
Cap Jewel
Hole Jewel
Cap Jewel
Balance cock
screw
24
Barrel and train
wheel bridge screw
(×3)
PARTS LIST
0012 354
10
Ratchet wheel screw
1
Hour wheel guard
screw (×3)
0012 919
Lower plate for
barrel and train
wheel bridge screw
18
30
Center wheel bridge
screw
15
Pallet bridge screw
(×2)
Parts No
Setting lever jumper
screw
(×2)
7
0012 168
Cal. 4R71A
Name
Name
Parts No
Name
Parts No
34

● 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
19
25
24
23
23
22
21
TECHNICAL GUIDE
*2
*3
*1 *1
*2 *3
*4
Type of oil
AO-3(Moebius A) S-6
S-4
Oil quantity mark
NORMAL QUANTITY
SUFFICIENT
QUANTITY

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
9/16
Cal. 4R71A
38
37
39
<< Disassembling >>
<< Assembling >>
23
21
19
TECHNICAL GUIDE
A

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
20
19
<< 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
Enlarged
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