Table of Contents
Advertisement
6138A ChronOgraPh Mechanisllfl
Ex planations o n t hi s p ag e a r e fo r th e n uclcu s o f 61 38 A.
Suf fic ient ly c he ck a nd ad j u st th e a ss er nb led mo vetn e nt.
I.Items
to be checked before assembling the iewelled
pallet fork
and staff, after setting the chronograph
bridge.
l) Confirm
that free running
force is transmitted
unaffectedly.
Even though no roll back motion
exists, as long as it functions smoothly there is no
problem. And at the same time check the perform-
ance of starting and stopping actions of the hour
recording wheel by turning over the movement.
2) Check for
meshing condition
of the first
and
second coupling /euers (Refer to 5139A-8).
3) Check clearance between the second coupling lever
and the intermediate
hour recording wheel stop
lever pin and their actions.
When stopping, clearance must exist between the
second coupling lever and the intermediate hour
recording wheel stop lever pin; when starting, the
second coupling
lever must push and move the
intermediate hour recording wheel stop lever pin.
む
{lntermediate
minute recordin9
w h e e l }
1. Mesh the intermeditte
minute recording
wheel and the minute recording wheel.
Refer to Fig. l0 for assembling this
spring (6138A-7)
Refer to Fな.7 foF aSSembling this
spring(6139A‑5)
Stop Start
̲嗅 χ 二 斐 ζ iI:‖
∬ :l11:"r
缶
reco rdi ng
wheel stop lever
F is . 4
Should they malfunction, adjust
them by tuming the second coupl-
ing lever axle eccentric pin. In this
case, perform this adjustment while
observing the delicate clearance be-
tween the second coupling lever and
the clutch lever.
2. Items to be checked after
assembling the balance
l) Check for strength and height
of
the minute
recording
iumper (Refer to 6139A-8).
2) Check for meshing position
of
the chronograph finger
(Refer to 6139A.-9).
3) Check for contacting condi-
tion
of the hammer and
hearts (Refer to 61394-10).
Balance cock screws (2 pcsl
Balance cock
Balance complete with stud
Pallet cock screws (2 pcs)
Pallet cock
Jewel l ed p al l e t f or k an d sta ff
\ -
Fi r s t co up l i ng l e v er s c r e w
\ - -
Fi r s t c o up l in g l ev e r
Holdlnぃ
¨ w for co¨
eVers①
①
①
＼
＼
＼
①
①
①
①
①
①
｀
￨ 、
Train wheel (process of force transmission)
Transmission of force when chronogtaph mechanism is started.
Transmission offorce when chrenograph mechanism is stopped.
When the minute and second chronographs are started, the force is transmitted
to both chronograph and train wheel by the action ofthe clutch, and when the
chronographs are stopped, the force is transmitted only to the train wheel.
When the hour chronograph is started, the force is transmitted frcm the barrel
+ friction sping for intermediate hour recording wheel +intermediate hour
recording wheel
-
hour recording wheel. When the hour chronograph is
Hour
stopped, force transmission to the hour recording wheel is stopped by a slip of
the friction spring for intermediate hour recording wheel.
It is not necessiuy to remove the
minute recording jumper
and, screws.
g
Minute recording jumper
Move them only when adjusting the
\
minute recording iumper.
\
Chronograph bridge screws (3 pcsl
( H a mm er c l i c k )
C h r on og r ap h br i d ge
NOTE: When assembling the chronogroph
bridge, pay attention to the following.
＠
④
9
∠ 『 謂
:驚
九賜 鰐 耀 Ъ 胤 ノ 昭
" 力 θ α
忠 躙 静 無 ①
Hammer
④
―― 一 ― Mttte rec∝
d... J④
― ∞ ¨ mgleverttmgO
Completely set the center portion of
the spring around the tube of the
-
barrel and train wheel bridge.
\__
A
S ec ond coupti ng tev er (5
l ,
O 1hc pi nof
tlte s t'tz -r l ld tottltli ttg /t' l r /
i r ttttttl rl r iv
do rr ot r otate
it e\cc p1 dtr r ing r ditrs tr r tcttt.
e
Ass err tbl r - l h(
( t) upli tl X
1t'tr'r 'r ir i r
\tr fti ti g
ri 'n tl il t,,r
to
pr cver t
danr aging
Lltc l rttr rl l t
vl ttl i
C e nt e r c hr o nog r a ph w h ee l { Fou r t h w hee l )
C en t e r w hee l
Barrel
Third wheel
scape wheel
ho ur r ec or di ng
w h eel
f i ng e r
3. Interlock the hammer click andthefly-back lever pin.
S c r ew f or m i nu t e r e c or di ng j umpe r
Wttrマ
hg
ξ Tamm∝
引 ょ
This click is
dr en into
1郵 罵 Tiedヾ L
Neverlubricatethe v
axle of this wheel.
(Fig. 5)
‑ 6 1 3 8 A ‑ 4 ‑
I n t er me di at e m i nu t e r ec or di ng w h ee l
recording wheel
Hide quick links:
Advertisement
Table of Contents
