Seiko 4R57A Technical Manual Download Page 10

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2. Disassembling / Reassembling of the First reduction wheel

First reduction wheel

Reduction wheel holder

Barrel and train wheel bridge (back side)

3. Disassembling / Reassembling of the Cannon pinion

Cannon pinion

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<< Disassembling >>

Cal.4R57A

Push

<< Reassembling >>

TECHNICAL GUIDE

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Summary of Contents for 4R57A

Page 1: ...us 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 25 s d...

Page 2: ...reserve wheel 1026 002 Planetary reduction wheel 1009 004 Second sun wheel 1001 025 1019 190 Sun and planet unit Center power reserve wheel 1009 003 0817 190 Sun wheel Intermediate center power reser...

Page 3: ...45 Hour wheel 0261 183 Lower shock absorbing spring Minute wheel and pinion 0225 438 Lower shock absorbing jewel Cannon pinion 0962 190 Lower hole jewel for shock absorber 3 14 16 15 17 Cal 4R57A Back...

Page 4: ...12 354 Pallet bridge screw 0161 300 0310 185 Pallet bridge Balance complete with stud 0301 009 Pallet fork Upper shock absorbing spring Upper hole jewel for shock absorber 4 14 Automatic train bridge...

Page 5: ...6 002 Reduction wheel holder 0436 166 Lower plate for barrel and train wheel bridge 0012 354 0144 245 Lower plate for barrel and train Fourth wheel and pinion wheel bridge screw 0231 070 Third wheel a...

Page 6: ...85 0601 183 Setting lever Stop lever Refer to page 9 for the oiling position 0282 183 Clutch wheel 0283 020 Winding pinion 0962 183 Date corrector setting transmission wheel A 0351 200 Winding stem Ma...

Page 7: ...rain wheel bridge screw 4 Balance bridge screw Pallet bridge screw 2 PARTS LIST 42 Barrel and train wheel bridge screw 3 Automatic train bridge screw 2 33 0012 100 Parts No 46 Name 0012 354 0012 919 C...

Page 8: ...eel 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 Reducti...

Page 9: ...inion and the Gear Sun and planet unit Sun wheel Stop lever Stop lever Main plate Contact part of Main plate and Stop lever 9 14 10 11 3 56 61 TECHNICAL GUIDE Cal 4R57A 9 2 2 Type of oil Oil quantity...

Page 10: ...l First reduction wheel Reduction wheel holder Barrel and train wheel bridge back side 3 Disassembling Reassembling of the Cannon pinion Cannon pinion 10 14 UP 24 Disassembling Cal 4R57A Push Reassemb...

Page 11: ...rst 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...

Page 12: ...A Setting lever Winding stem 7 Accuracy adjustment Regulator Regulator pin Stud support Note Regulator Time adjustment Stud support Beat error adjustment Regulator pin Gap adjustment of Balance spring...

Page 13: ...tal plate or something similar We recommen using Universal Movement Holder S 682 Be careful not to apply strong pressure to the movement Note Power reserve hand setting 1 The Mainspring should be full...

Page 14: ...Turn the crown counterclockwise for date setting Do not set the date between 9 00 P M and 1 30 A M If you do so the date may not change properly or it may cause a malfunction 3 Push the crown back in...