Complete
Teardown,
Cleaning,
and
Reassembly
of
the
Olympus
BH
‐
2
Sliding
Focus
Block
Revision
2
Page
15
of
23
Figure
41
–
Place
rollers
and
rod
onto
bottom
guide
rails
Place
Focus
Block
Assembly
onto
Cylindrical
Rollers
Carefully
place
the
focus
block
assembly,
with
the
guide
block
held
loosely
in
place
on
the
back
side
of
the
focus
block,
onto
the
cylindrical
rollers
on
the
guide
rails
in
the
bottom
groove
of
the
arm
casting
(see
Figure
42
).
Figure
42
–
Place
focus
block
assembly
onto
rollers
Withdraw
about
half
the
length
of
the
guide
block
from
behind
the
focus
block,
making
sure
to
not
disturb
the
positioning
of
the
two
brass
shims
stuck
onto
the
back
side
of
the
focus
block
or
the
guide
rails
seated
in
the
side
groove
of
the
guide
block
(see
Figure
43
).
Figure
43
–
Withdraw
the
guide
block
about
halfway
Place
Cylindrical
Rollers
onto
the
Upper
Guide
Rails
IF
GREASE
IS
TO
BE
USED
IN
THE
SLIDING
FOCUS
BLOCK
(RECOMMENDED):
Lightly
coat
four
of
the
cylindrical
rollers
and
the
remaining
plastic
spacer
rod
with
a
suitable
grease
(item
5
or
7
of
Appendix
2
).
Place
these
four
greased
cylindrical
rollers
onto
the
greased
guide
rails
in
the
groove
on
top
of
the
guide
block,
where
the
guide
block
is
protruding
from
the
bottom
of
the
arm
casting
(see
Figure
44
,
shown
without
grease
for
clarity).
Orient
the
rollers
as
shown
in
the
photo
inset.
IF
GREASE
IS
NOT
TO
BE
USED
IN
THE
SLIDING
FOCUS
BLOCK:
Place
four
of
the
cylindrical
rollers
onto
the
guide
rails
in
the
groove
on
top
of
the
guide
block,
where
the
guide
block
is
protruding
from
the
bottom
of
the
arm
casting
(see
Figure
44
).
Orient
the
rollers
as
shown
in
the
photo
inset.
Figure
44
–
Place
four
rollers
on
the
upper
guide
rails
Use
the
remaining
plastic
spacer
rod
to
carefully
push
the
four
cylindrical
rollers
into
the
channel
formed
by
the
four
guide
rails
(two
in
the
focus
block
and
two
in
the
arm
casting),
making
sure
that
the
rollers
do
not
come
out
of
position
on
the
guide
rails
as
they
are
pushed
into
the
channel
(see
Figure
45
).
Figure
45
–
Push
cylindrical
rollers
into
guide
‐
rail
channel
