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Reassembly of
the Model 260 Movement
ADJUST CENTERING
\
REGULATOR
SLOT
REGULATOR
TAB
----
HAIRSPRING
FIGURE F
AREA
WEDGE PIN
WEDGE PIN
BRACKET
Insert
the end of the
hairspring into
the
s
lot in
the regulator and then
into
the hole
in
the
hairspring
brocket by rotating the balance wheel and guiding
the
end
of the
spr
ing
.
Check that the impulse pin is
in
the slot of the
index
lever
and then secure the hairspring in the brocket with the
wedge
pin.
Adjust the balance
whee
l
assembly
end shake
cautiously by tightening the
balance
end shake
adjusting
screws.
Do Not adjust too tightly because
excess
pressure con damage the pivots of the balance staff
.
Loosen the shunt bridge
screw,
slide the shunt bridge under the hairspring, and
secure
with
shunt bridge screw.
Check for adjustment of hairspring and adjust if necessary.
The hairspring should be
leveled,
centered and
in light
permanent contact with
the inside edge of regulator slot and the regulator tab as shown in Figure F.
Hairspring must not
lea
ve
the described contact points at any time
with
regula-
tor within normal regulating
range.
Hairspring con be adjusted for proper
leve
l
by grasping spring as close as
possible to pinning point. To adjust
centering-
grasp
160
°
to
180
°
from
pinning point. To adjust hairspring to remain in permanent contact
with
regu-
lator slot and
tab,
carefully bend tab towards center
of
spring until desired
condition is obtained.
260
.9
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