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Reassembly of the Model 23 Movement
V- CONIC BEARING
DIAL PLATE
BALANCE
w
MOVEMENT PLATE
Replace the balance carefully into
the movement by tilting the wheel
and
inserting
first, the
movement
side
pivot
(hairspring side)
then,
the dial
side pivot
into the
"V-
conic bearing". Adjust the balance
screw enough to hold the balance in
place
.
By rotating the
balance,
inser
t
the hairspring into the regulator slot
and hairspring wedge pin bracket. Be-
fore re-pinning the hairspring, make
certain
t
he impulse pin is within the
slot on the fork
.
Repin the hairspring
making sure that the wedge pin is
straight and true, as any distortion to
the
pin
could
interfere
with
the
normal "breathing" of the hairspring
.
The endshake is now finally adjusted
using caution to apply only minimum
downward pressure to the balance
screw
as
excessive pressure
could
damage the points of the balance
staff.
Inspec
t
the hairspring to be certain
that it is properly adjusted. As shown
by the diagram, the hairspring should
be
positioned central ly within the
hairspring
slot.
23.7
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