Apply a light coating of fresh grease to the entire length
of the fine-focus shaft, making sure you have 100%
coverage. Insert the fine-focus shaft into the bore of
the coarse-focus shaft from the side of the pillar arm
from which it was originally removed.
Figure 91 – Slide fine-focus shaft into coarse-focus shaft
Be careful if inserting the shaft from the right-hand side
of the pillar arm, to make sure that the small plastic
gear pressed into the underside of the fine-focus knob
(see
Figure
16) does not get damaged when it drops
into mesh with its mating gear. Remove any grease
squeeze-out from the opposite side.
Reinstall the Second Fine-Focus Knob
Insert a 2.5mm Allen tool or driver into the M3X8 hex
socket-head cap screw in the fine-focus knob on the
stand, and slip the remaining fine-focus knob over the
fine-focus shaft protruding on the opposite side (see
Figure
92). If this second knob is installed onto the
right-hand side, make sure that the small plastic gear
pressed into the underside of the fine-focus knob (see
Figure
16) does not get damaged when the shaft goes
into it or when it drops into mesh with its mating gear.
Figure 92 – Reinstall the fine-focus knob (left side shown)
Complete Teardown, Cleaning, and Reassembly of the Olympus BH-2 Coaxial Focus Mechanism
While holding the Allen tool or driver in the original
knob stationary, use a second 2.5mm Allen tool or
driver to reinstall the M3X8 hex socket-head cap screw
and lock washer to secure the second knob (see
93) to the fine-focus shaft. Be sure to keep the fine-
focus knob on the right-hand side fully seated while
tightening the screw, to prevent damaging the fragile
plastic gear pressed into the underside of the right-hand
fine-focus knob (see
Figure
Figure 93 – Reinstall screw to secure the second knob
After tightening the screws in the fine-focus knobs,
loosen the tension-adjustment knob if necessary and
verify that both the coarse-focus and fine-focus knobs
rotate freely. Test for end play in the fine-focus knobs.
If noticeable end play is present, remove the fine-focus
knobs and re-shape the curved-disk spring washer on
the shoulder of the brass shaft mount and reassemble
per the above procedure.
Reinstall the Focus Rack onto Sliding Focus Block
Clean the old grease from the brass focus rack. With
the sliding focus block sitting at its lowest position, use
a 2.5mm Allen tool or driver to loosely reinstall the
upper M3X8 hex socket-head cap screw to hold the rack
onto the back of the sliding focus block (see
Do not fully tighten this screw yet.
Figure 94 – Reinstall the top screw to hang the focus rack
Figure
16).
Figure
Revision 4
Page 30 of 40
94).
Halaman Cetak