Complete
Teardown,
Cleaning,
and
Reassembly
of
the
Olympus
BH
‐
2
Sliding
Focus
Block
Revision
2
Page
14
of
23
Figure
36
–
Guide
rails
installed
into
the
guide
block
Apply
Grease
to
the
Guide
Rails
(Optional)
IF
GREASE
IS
TO
BE
USED
IN
THE
SLIDING
FOCUS
BLOCK
(RECOMMENDED)
Lightly
coat
the
exposed
surfaces
of
the
four
long
guide
rails
in
the
arm,
the
two
short
guide
rails
in
the
guide
block,
and
the
two
short
guide
rails
in
the
focus
block
with
suitable
grease
(item
5
or
7
of
Appendix
2
).
Place
the
Guide
Block
into
Position
on
the
Focus
Block
Reinstall
the
two
brass
shims
onto
the
focus
block,
using
a
small
dab
of
heavy
grease
(item
6
of
Appendix
2
)
at
each
end
of
the
shims
to
hold
them
in
position
during
the
subsequent
reassembly
steps
(see
Figure
37
).
Figure
37
–
Reinstall
the
brass
shims
onto
the
focus
block
After
placing
the
two
brass
shims
into
position
on
the
back
of
the
focus
block,
wipe
away
any
exposed
grease
with
a
clean
dry
tissue
(see
Figure
38
).
Figure
38
–
Clean
exposed
grease
from
the
focus
block
Place
the
guide
block,
with
two
short
guide
rails
installed
into
its
side
groove,
into
position
on
top
of
the
two
brass
shims
sitting
on
the
focus
block
(see
Figure
39
).
Note
the
proper
orientation
of
the
beveled
edge
of
the
guide
block
(see
Figure
40
).
Figure
39
–
Reinstall
guide
block
onto
the
focus
block
Place
two
M3X16
hex,
socket
‐
head
cap
screws
through
the
holes
in
the
focus
block,
and
use
a
2.5mm
Allen
wrench
or
driver
to
loosely
engage
the
threads
of
the
screws
with
the
two
wedge
nuts
(see
Figure
40
).
Figure
40
–
Loosely
engage
screws
with
the
wedge
nuts
Place
Cylindrical
Rollers
onto
Lower
Guide
Rails
of
Arm
IF
GREASE
IS
TO
BE
USED
IN
THE
SLIDING
FOCUS
BLOCK
(RECOMMENDED):
Lightly
coat
eight
of
the
cylindrical
rollers
and
one
of
the
plastic
spacer
rods
with
suitable
grease
(item
5
or
7
of
Appendix
2
).
Place
these
eight
greased
cylindrical
rollers
and
the
greased
plastic
spacer
rod
onto
the
greased
guide
rails
in
the
bottom
channel
of
the
arm
casting
(see
Figure
41
,
shown
without
grease
for
clarity).
Note
the
alternating
orientation
of
the
rollers.
IF
GREASE
IS
NOT
TO
BE
USED
IN
THE
SLIDING
FOCUS
BLOCK:
Place
eight
of
the
cylindrical
rollers
and
the
one
of
the
plastic
spacer
rods
onto
the
guide
rails
in
the
bottom
channel
of
the
arm
casting
(see
Figure
41
).
Note
the
alternating
orientation
of
the
rollers.
