Complete Teardown, Cleaning, and Reassembly of the Olympus BHSU/BHTU Reverse Nosepiece Assembly
Revision 3
Page 8 of 19
Now that the four M2.6X25 pan-head screws and the
corrective-optics assembly have been removed, remove
the loose wedge mount from the turret assembly (see
).
Figure 9
–
Remove the wedge mount
Remove the Cover from the Turret Assembly
Use a suitable JIS screwdriver to remove the three
M2X3 countersink screws securing the protective cover
onto the stationary base (see
) and remove the
protective cover (see
).
Figure 10
–
Remove screws securing the cover in place
Figure 11
–
Remove the protective cover
Figure 12
–
The turret assembly (without cover)
Remove Lock Ring for the Pivot-Adjustment Screw
The slotted lock ring for the pivot-adjustment screw
(see
) can be difficult to remove unless the
proper tool is used. Do not attempt to remove the
slotted lock ring and pivot-adjustment screw unless you
have access to such a tool, since the slot in the lock ring
will likely be damaged if you use an improper tool,
making removal of the lock ring much more difficult
1
. A
suitable tool for this task can be easily made by filing or
grinding a relief notch for the pivot-adjustment screw in
the center of the blade of a large slotted screwdriver, as
shown in
. Note that if you decide to make
such a tool, be sure that the tip of the screwdriver you
select has a blade width matching the outer diameter of
the slotted lock ring, and that the thickness of the blade
is such that it will seat fully into the slot of the slotted
lock ring.
Figure 13
–
Screwdriver modified to remove slotted lock ring
Before attempting to loosen the slotted lock ring, the
revolving turret must first be locked in position relative
to the stationary base, in order to allow for sufficient
torque to be applied to the slotted lock ring to loosen
1
Don’t even think about using a pair of needle
-nose pliers to loosen the
slotted lock ring. It will end badly if you do. D
on’t ask me how I know this
.
