Seiko 4R15A Technical Manual Download Page 5

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PARTS LIST

Cal. 4R15A/4R15B/4R16A/4R16B

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[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

SHOCK ABSORBER

25 0014577

SHOCK ABSORBING SPRING

0011220

SHOCK ABSORBING CAP

JEWEL

27 0014295

HOLE JEWEL FRAME

FOR SHOCK ABSORER

29-1 0171108
BALANCE COCK

29-3 0341020
REGULATOR

SHOCK ABSORBING
FLAME

29-2 0345021
STUD SUPPORT

29-4 0033364
REGULATOR PIN

Summary of Contents for 4R15A

Page 1: ...seconds s d Dial upward T0 CH 30 s d ETACHRON system From fully wound to stoppage Approximately 50 hours Cal 4R15A B has only date but without day Descriptions related to day display and day correctio...

Page 2: ...ly or annual rate accuracy of a mechanical watch is normally indicated by a daily rate loss gain per day 3 Normal usage accuracy of a mechanical watch varies according to conditions of use time period...

Page 3: ...E DISK 4R16 0878281 0878207 8 DATE JUMPER 0810030 0810183 9 CALENDAR CORRECTOR SLIDNG INTERMEDIATE WHEEL 0737300 0737183 10 HOUR WHEEL 0271483 0273183 12 DATE DRIVING WHEEL 0802300 0802183 13 MINUTE W...

Page 4: ...300 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 FO...

Page 5: ...LATING 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 ABSORB...

Page 6: ...EEL 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...

Page 7: ...8171 How to find the correct parts if not determined by 4 digit caliber number 2 DAY DISK WITH DAY STAR 0160 7 DATE DISK Note Parts differs between caliber a and b Refer to the page 3 0878 or 0148 Fol...

Page 8: ...9 0012 539 0012 354 0016 705 0012 420 0012 168 21 Second reduction wheel screw 5 Date disk guard screw B for Cal A 51 Setting level jumper screw 4 Date dial guard screw A 5 Date disk guard screw B for...

Page 9: ...r wheel Forth wheel Third wheel Escape wheel Pallet fork Balance First reduction wheel Pallet fork entry pallet Pallet fork exit pallet Balance roller jewel Total Upper Cap Jewel Hole Jewel Lower Cap...

Page 10: ...6A 4R16B PARTS LIST 10 19 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 Moeb...

Page 11: ...n NORMAL Push the Setting Lever gently refer to the picture on the right in order to disengage it from the SETTING STEM Then pull out the crown with the stem completely After dismantling the movement...

Page 12: ...s to the BALANCe COCK When doing so make sure that the second bend of the balance spring does not touch the RegULAtOR PiN 2 PushoutthestudparalleltotheslitoftheStUDSUPPORt thedirectionalsoshownbythere...

Page 13: ...ily set the stud to the StUD SUPPORt Do not engage the balance spring to the RegULAtOR PiN the balance spring passes outside of the RegULAtOR PiN at this stage 4 Push back the stud parallel to the sli...

Page 14: ...HT 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 BA...

Page 15: ...isochronism fault by adjusting the position of the balance spring this caliber has the etachron system for fine regulation of the isochronism fault which is the same design used for both Cal 7S B seri...

Page 16: ...he slot of the RegULAtOR PiN StUD 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 top side view back...

Page 17: ...ulled off Pull out the crown to the 1st click then turn it Calendar mechanism correcting the date and day if available Make sure that the date and day changes smoothly Pull out the crown to the 2nd cl...

Page 18: ...5BAR 5 BAR WATER RESIST 10BAR 10 BAR WATER RESIST 15BAR 15 BAR WATER RESIST 20BAR 20 BAR SCUBA DIVER S AIR DIVER S 150 m 18 75 BAR 150 m times 0 125 SCUBA DIVER S AIR DIVER S 200 m 25 BAR 200 m times...

Page 19: ...t high temperatures while they tend to gain time at low temperatures v In order to improve accuracy it is important to regularly supply energy to the balance that controls the speed of the gears The d...

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