Complete
Teardown,
Cleaning,
and
Reassembly
of
the
Olympus
BH
‐
2
Sliding
Focus
Block
Revision
2
Page
17
of
23
that
the
focus
block
slides
freely,
without
stiffness,
binding,
or
lateral
play
throughout
the
normal
range
of
motion
(see
Figure
50
).
Figure
50
–
Adjust
for
free
motion
without
lateral
play
Secure
the
Guide
Block
in
Position
Use
a
2.5mm
Allen
wrench
or
driver
to
tighten
the
three
M3x12
hex,
socket
‐
head
cap
screws
to
secure
the
guide
block
in
position
on
the
focus
block
(see
Figure
51
).
Figure
51
–
Secure
the
guide
block
in
position
Test
the
Focus
Block
for
Freedom
of
Motion
Test
the
freedom
of
motion
of
the
sliding
focus
block,
making
sure
that
there
is
no
significant
stiffness,
binding,
or
lateral
play
at
any
point
throughout
the
full
range
of
motion
of
the
focus
block
(see
Figure
52
).
If
necessary,
loosen
the
three
M3x12
hex,
socket
‐
head
cap
screws
securing
the
guide
block
to
the
focus
block,
and
the
two
M3x16
hex,
socket
‐
head
cap
screws
that
tension
the
guide
block,
and
readjust
per
the
above
procedure
until
the
resulting
motion
of
the
sliding
focus
block
is
smooth,
unrestricted,
and
without
lateral
play.
Figure
52
–
Test
the
sliding
focus
block
for
proper
motion
Reinstall
the
Trim
Cover
Carefully
position
the
U
‐
shaped
trim
cover
into
position
on
the
arm
casting,
aligning
the
four
holes
in
the
trim
cover
with
the
four
tapped
holes
in
the
casting
(see
Figure
53
).
Be
careful
to
avoid
bending,
denting,
or
scratching
this
fragile
cover.
Figure
53
–
Reposition
trim
cover
onto
the
arm
casting
Use
a
suitable
JIS
screwdriver
to
reinstall
four
M2x4
JIS
screws
to
secure
the
trim
cover
onto
the
arm
casting
(see
Figure
54
).
Figure
54
–
Reinstall
screws
to
secure
the
trim
cover
