LEMANIA CH 27C12 Manual Download Page 1

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Summary of Contents for CH 27C12

Page 1: ...IDENTIFICATION OF CHRONOGRAPH IJli IDIHD I2L LEMANIA CAL CH 27C12...

Page 2: ...much time will be lost in putting the chronograph together if screws are mixed up This means you have to hunt for each screw sometimes trying three or four screws before finding the correct one It can...

Page 3: ...After disassembling and assembling the chronograph mechanism start on page 1 and read the function of this part After reading the function of this part continue to read the function of each part throu...

Page 4: ...el Bridge Assembly No 5 Hour Register Wheel Assembly No 8 Hour Wheel Assembly No 9 Wheel Over Fourth Wheel Assembly No 10 Brake Lever Assembly No 19 Actuating Lever for Hour Brake Assembly No 11 Inter...

Page 5: ...gister Pawl Assembly No 22 intermittent Lever Spring Assembly No 28 Trip Pin Assembly No 31 mbly No 34 Driving Pinion Tension Spring and Dr ving Pinion Hour Register Hand A Seconds Wheel Tension Sprin...

Page 6: ...the heart on hour regis ter wheel CORRECTION If the hour brake lever permits the hour flyback lever to contact the heart on hour register wheel this condition can be corrected by adjusting eccentric s...

Page 7: ...NCE Seconds wheel dart tooth is Assembly 25 C Intermittent wheei is Assembly 29 A 4 With the flyback lever holding the seconds wheel at a zero position check to see that intermittent wheel is disengag...

Page 8: ...e eccentric studs are used to adjust one part to another and naturally in turning these studs you will lose the desired adjustment of the chronograph mechan ism which will cause the chronograph to fun...

Page 9: ...graph The spring should pivot freely under head of shouldered screw REFERENCE Hour brake lever is Assembly 2 D FUNCTIONOF HOURBRAKELEVER SPRING The function of this spring is to hold a tension on the...

Page 10: ...Hour Brake Lever Spring Assembly No 1 OILING End H A oi hour brake lever spring should be slightly mois tened with oil at the point of contact with hour brake lever 0 DIAL SIDE l A...

Page 11: ...itted to do so by the chronograph mechanism 2 It prevents the hour flyback lever from engaging with hour register wheel when the chronograph mechanism is engaged REFERENCE Barrel bridge is Assembly 5...

Page 12: ...oints on hour brake lever should be slightly moistened with oil 1 The shoulder of screw that brake lever pivots on 2 End HE oi brake lever that contacts eccentric stud on connecting lever 3 End uD of...

Page 13: ...ace shouldered screw SS 3 to hold this lever in position The connecting lever should pivot freely under head of shouldered screw C FUNCTION OF CONNECTING LEVER The function of this lever is to disenga...

Page 14: ...nts on connecting lever should be slightly moistened with oil 1 Shoulder of screw on which the connecting lever pivots 2 End A at point of contact with pin A on actuating lever for hour brake OILING D...

Page 15: ...ate Hold spring in position with finger and replace fil lister head screw FS I REFERENCE Hour flyback lever is Assembly 6 Hour register wheel is Assembly 8 D FUNCTION OF HOUR FL YBACK LEVER SPRING The...

Page 16: ...A Hour Flyback Lever Spring Assembly No 4 OILING End A of hour flyback lever spring should be slightly mois tened with oil at point of contact with hour flyback lever DIAL SIDE 4 A...

Page 17: ...downto proper place and replace flllister head screw FS 2 Position of this screw is shown in the photograph REFERENCE Hour register wheel is Assembly 8 Hour flyback lever is Assembly 6 Push piece for...

Page 18: ...ts on barrel bridge should be oiled 1 The top pivot of hour register wheel should be oiled as you would normally oil a train pivot 2 The top pivot of barrel arbor should be oiled as you would normal l...

Page 19: ...is pushed manually 4 When the chronograph mechanism is engaged and the hour flyback lever is forced toward the heart on the hour register wheel the end D on the hour flyback lever will contact point A...

Page 20: ...i c A Hour Flyback Lever Assembly No 6 OILING The surfa ce of screw head He that contacts the barrel bridge should be slightly moistened with oil DIAL SIDE f 6 A...

Page 21: ...hed manually REFERENCE Hour flyback lever is Assembly 6 Hour register wheel is Assembly 8 REMARKS The simultaneous setting back to zero of the chronograph hands and the hour register hand is greatly s...

Page 22: ...A Push Piece for Setting Back to Zero Assembly No 7 OILING End itA oi push piece should be slightly moistened with oil at point of contact with hour flyback lever DIAL SIDE 7 A...

Page 23: ...to a zero position REMARKS When cleaning the hour register wheel and the driving pinion particular care should be taken to see that the teeth on these wheels are clean and free of grit OF dirt The tee...

Page 24: ...The bottom pivot of hour register wheel should be oiled before replacing pivot in place in plate The top pivot should be oiled after barrel bridge is replaced B Hour Register Wheel Assembly No 8 DIAL...

Page 25: ...to this wheel REMARKS When disassembling the chronograph each part should be carefully examined as it is removed from the movement Each part should be checked against the isometric drawings to see th...

Page 26: ...d J l Hour Wheel Assembly No 9 OILING The hour wheel should not be oiled DIAL SIDE 9 A...

Page 27: ...the chronograph mechanism If the sweep wheel remover is held perfectly upright in removing this wheel hazard of bending the fourth wheel pivot will be eliminated C ASSEMBLY PROCEDURE OF WHEEL OVER FO...

Page 28: ...rth e of w om Wheel Over Fourth Wheel Assembly No 10 The wheel over fourth wheel should not be oiled OILING TRAIN SIDE lO A...

Page 29: ...ead of clockwise it will be come tighter and may strip the threads in the plate or on the screw C ASSEMBLYPROCEDURE OF ACTUATING LEVER FOR HOUR BRAKE Place actuating lever for hour brake over proper h...

Page 30: ...Actuating Lever for Hour Brake Assembly No 11 OILING The shoulder of screw on which actuating lever for hour brake pivots should be slightly moistened with oil TRiUN SIDE I I I I l1 A...

Page 31: ...hook forcing it toward center of watch End A of spring should contact chronograph pivoted detent forcing it toward center of watch Hold spring in place with finger and replace beveled countersink scre...

Page 32: ...d Actuating Detent Lever Spring Assembl Noo 12 OILING The following points of this spring should be slightly moistened with oil 1 End HA at point of contact with the chronograph pivoted detent 2 End B...

Page 33: ...sh down in place with back of tweezers Replace beveled countersink screw BS 3 that holds this bridge in position D HAZARDSIN ASSEMBLYOF CHRONOGRAPHPIVOTED DETENT BRIDGE Bridge must be kept level when...

Page 34: ...Detent Bridge Assembly No 13 el as iy lace ds TRAIN SIDE OILING The pivot in bushing in chronograph pivoted detent bridge should be oiled as you would properly oil a train pivot in a watch E of vot l...

Page 35: ...to the seconds wheel when these wheels are engaged The intermediary wheel continues to turn as long as the watch is running REFERENCE Wheel over fourth wheel is Assembly 10 Seconds wheel is Assembly 2...

Page 36: ...y No 14 i OILING The bottom pivot of intermediary wheel should be oiled before replacing pivot in place in chronograph pivoted detent The top pivot should be oiled alter bridge for this wheel is place...

Page 37: ...move freely under head of screw and yet does not have ex cess freedom Detent must also be checked to see that it pivots freely on eccentric stud D REMARKS This chronograph is a semi instantaneous typ...

Page 38: ...I Chronograph Pivoted Detent Assembly No 15 The eccentric stud that the chronograph pivoted detent pivots on should be slightly moistened with oil OILING TRAIN SIDE 15 A...

Page 39: ...head t c of flyback lever Now turn fly back lever toward outside of watch while pressing down lightly and flyback lever will snap into position Now engage flyback lever spring between head of screw C...

Page 40: ...The post on which flyback lever pivots 2 Shoulder of screw e on Ilyback lever that contacts flyback lever spring 3 Point D on flyback lever that contacts trip pin 4 Point F on flyback lever that conta...

Page 41: ...is shown in the photograph C HAZARD8IN A8SEMBLYOF ACTUATINGDETENT LEVER Before tightening screw on detent check to see that pin B on detent is down in hole in joint hook D FUNCTION OF ACTUATINGDETENT...

Page 42: ...sembly No 1 7 OILING The following points of actuating detent lever should be slightly moistened with oil 1 The shoulder of screw on which detent pivots 2 Pin HB on detent lever that holds joint hook...

Page 43: ...ause the joint hook not to function properly D FUNCTIONOF 10INT HOOK The function of the joint hook is to turn the castle wheel the space of one ratchet tooth each time the end A of actuating detent l...

Page 44: ...brake lever is not under or on top of seconds wheel Also make sure that end tiC of spring is not on top of screw head F D FUNCTION OF BRAKE LEVER The blade E of the brake lever engages end uD of this...

Page 45: ...c o Brake Lever Assembly No 19 1 The shoulder of screw on which brake lever ptvots should be slightly moistened with oil OP ING ts TRAIN SIDE...

Page 46: ...and holds it in this position until the flyback lever is dis engaged by the castle wheel 2 It holds the flyback lever in proper position on post in plate preventing it from riding up and coming out of...

Page 47: ...G ld ree e i Lgh le e is 1 Flyback Lever Spring Assembly No 20 OILING End A of flyback lever spring should be oiled after replac ing flyback lever 0 TRAIN SIDE 20 A...

Page 48: ...uld turn freely after bridge is replaced REFERENCE Minute register pawl is Assembly 22 C HAZARDS IN ASSEMBLY OF MINUTEREGISTERPAWL BRIDGE 1 Before tightening screw check to see that minute register pa...

Page 49: ...nute Register Pawl Bridge Assembly No 21 OILING Pin A on minute register pawl bridge that holds minute re gister pawl in position should be slightly moistened with oil before replacing this bridge TRA...

Page 50: ...e register pawl are as follows 2 It holds a tension on minute register wheel so that a bump or jar carmot alter the position of this wheel REFERENCE Minute register pawl bridge is Assembly 21 REMARKS...

Page 51: ...i h vheel vhich Minute Register Pawl Assembly No 22 OILING The minute register pawl should not be oiled TRAIN SIDE 22 A...

Page 52: ...n freely under the head of screw REFERENCE Seconds wheel and minute register wheel bridge is Assembly 24 D HAZARDSIN ASSEMBLYOF MINUTE REGISTER PAWL SPRING Handle spring carefully when replacing it as...

Page 53: ...NG t NG d r s 2 Minute Register Pawl Spring Assembly No 23 A OILING The minute register pawl spring should be slightly moistened with oil at the point it contacts minute register pawl TRAIN SIDE 23 A...

Page 54: ...or plate C ASSEMBLYPROCEDUREOF SECONDS WHEEL ANDMINUTE REGISTER WHEEL BRIDGE Place bridge on plate with steady pins over proper holes in plate Place top pivots of seconds wheel and minute register wh...

Page 55: ...Seconds Wheel and Minute Register Wheel Bridge Assembly No 24 OILING The pivots in the jewels in this bridge should be oiled as you would properly oil a train pivot in a watch TRAIN SIDE 24 A...

Page 56: ...s shown as HB on the isometric draw ing REFERENCE Seconds wheel dart tooth is Assembly 25 C Intermittent wheel IsAssembly 29 A Minute register wheel is Assembly 27 Flyback lever is Assembly 16 REMARKS...

Page 57: ...n this ric draw 1 by the aeel minute is wheel ntial for a zero have to register agister wheel ite re i This zht back Seconds Wheel ssembly NOo25 A OILING The top pivot of seconds wheel should be oiled...

Page 58: ...up Replace fillister head screw FS 6 After tightening this screw make sure that end A of spring is in the position shownin the photograph so that it cannot possibly contact the seconds wheel post REF...

Page 59: ...Seconds Wheel Tension Spring Assembly No 26 OILING The seconds wheel tension spring should not be oiled r TRAIN SIDE 26 A...

Page 60: ...is returned to a zero position by the flyback lever contacting the heart on minute register wheel r The heart on this wheel is set eccentric When the flat end of flyback lever contacts the eccentric h...

Page 61: ...The rback n ross t zero iosf art it bring lyback 1 it was S in Minute Register Whee Assembly No 27 B A OILING The top pivot of minute register wheel should be oiled after the bridge for this wheel is...

Page 62: ...photograph Be sure end A of spring is on top of lip tlBH of intermit tent lever and wheel assembly Replace fillister head screw FS 7 REFERENCE Intermittent lever and wheel assembly is Assembly 29 C FU...

Page 63: ...rmit is mit to en t wn 19 out 25 C l I 7 A Intermittent Lever Spring Assembly No 28 OILING End A of intermittent lever spring should be slightly moistened with oil at point it contacts intermittent le...

Page 64: ...t this time The intermittent wheel should be carefully checked to see that it has proper endshake and spins freely in the intermittent lever This wheel must of necessity spin freely as any excess fric...

Page 65: ...el dart t wheel nmg S ter rte iet I as 5 wheel I 1 I I Intermittent Lever and A Wheel Assemblv 8 Assembly No 29 OILING The post on which intermittent lever and wheel assembly piv ots should be slightl...

Page 66: ...ENCE Trip pin is Assembly 31 D FUNCTIONOF TRIP PIN SPRING The function of the trip pin spring is to hold a tension on the trip pin to engage this pin with the flyback lever and hold it engaged until i...

Page 67: ...er re I 1 t in to Is is to crew er 10 n 7 B c Trip Pin Spring Assembly No 30 OILING End A of trip pin spring where it contacts trip pin should be slightly moistened with otl TRAIN SIDE 30 A...

Page 68: ...vot or turn to perform their function are held in place by shouldered screws Each part should be checked to see that the shoulder of screw properly fits this part so it will function correctly The dia...

Page 69: ...d Trip Pin Assembly No 31 l 1 end 70m vhen ed Pivot of trip pin that fits in plate should be Slightly moistened with en OILING TRAIN SIDE n to sws w I 1 II I uld I lead t e I d 1 I en I 31 A...

Page 70: ...plate Press pawl down in position and replace beveled countersink screw BS 4 C FUNCTIONOF CASTLE WHEEL PAWL The functions of the castle wheel pawl are as follows 1 This pawl correctly spaces the turn...

Page 71: ...A Castle Wheel Pawl Assembly No 32 OILING The castle wheel pawl should not be oiled I 1 I I 1 TRAIN SIDE 32 A...

Page 72: ...NCE Intermediary wheel is Assembly 14 Seconds wheel is Assembly 25 Brake lever is Assembly 19 Hour register wheel is Assembly 8 F lyback lever is Assembly 16 Hour brake lever is Assembly 2 Minute regi...

Page 73: ...ightly moistened with oil 1 The hollow post in plate on which castle wheel pivots 2 The columns A on castle wheel at the points that they contact the parts of this mechanism 3 The ratchet teeth B on c...

Page 74: ...B of spring that hold pinion in position down Now place this assembly on long pivot of barrel arbor with the pinion up as shown in drawing at bottom of page Now replace fillister head screws FS IO and...

Page 75: ...rAND crews riv be r e I I I OILING The following parts should be oiled 1 The part of driving pinion that contacts barrel cap 2 The barrel arbor pivot on which driving pinion pivots Caution Do not ove...

Page 76: ...eel and minute register wheel from return ing to a zero position a F lyback lever spring not holding a proper tension on flyback lever b The seconds wheel or minute register wheel binding and not turn...

Page 77: ...mittent wheel to move away from seconds wheel dart tooth may be caused by improper adjustment of eccentric stud ES 4 See adjustment of eccentric studs 2 PRESS THE BUTTON AT THE RIGHT OF THE PENDANT RE...

Page 78: ...the dart tooth make s one revolution 3 PUSH THE BUTTON AT THE RIGHT OF THE PENDANT RELEASE IT ANDCHECK THE FOLLOWING A A Check to see that trip pin is holding the flyback lever a way from the center...

Page 79: ...n the barrel arbor 5 RELEASE THE BUTTON AND CHECK THE FOLLOWING A Check to see that the hour flyback lever has returned to its original position CORRECTION The following errors may prevent the hour fl...

Page 80: ...it the hour flyback lever to contact the heart on hour register wheel D 8 Remove the movement from case replace dial and hands and replace movement in case PUSH THE BUTTON AT THE LEFT OF THE PENDANT R...

Page 81: ...to minute register wheel 1 ze r D Let the chronograph run for a period of time and check to see that hour register hand correctly registers the pas sage of hour s CORRECTION The following errors may p...

Page 82: ...ong as watch is running i I I I I I I I I SPLIT SECOND SCALE C This scale is divided into 300 divisions each indicating 1 5 of a second Every fifth division is marked with extra long lines denot ing o...

Page 83: ...Whenthe flyback lever is held in toward the center of the watch place the sweep second hand at 60 on split second scale C Place the minute register hand at 30 on minute register scale lD Place the hou...

Page 84: ...ical details com prising over sixty seven 67 different trade names of chronographs Therefore all persons are hereby warned that everything contained herein is original mater ial text illustrations dra...

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