80.4
Disassembly
of
movement
for
Cleaning
Coot'd.
BALANCE
SCREW
ASSEMBLY
PLATE
HAIRSPRING
BRACKET
V-CONIC
BEARING
Removing the Balance
Wheel Assembly
Two
"V-conic"
bearings are used
with the balance staff on the Timex
Model
80 movement.
The
bearing
on the
dial
plate
is
mounted in a
screw
so
that fine endshake adjust-
ment
is
possible.
Removal
of
the balance wheel
assembly should be carried out in
the following manner:
a)
Remove
the hairspring wedge
pin, being careful not to distort
either the pin
or
the hairspring.
b) Rotate the balance wheel slowly
until the hairspring
tail
is
free
of
the hairspring wedge pin
bracket and the regulator.
c)
Loosen the balance screw
assembly
(counter-clockwise
direction) using a suitable screw
driver, until the end
of
the
bal-
ance staff
is
free
of
the
"V-
conic" bearing. During the
loosening
of
the screw,
only
minimum downward pressure
should be
applied
with the
screw driver,
as
excessive down-
ward
pressure could seriously
damage
the · balance staff
points.
d)
Carefully
remove the balance
assembly.
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