Olympus BH2 Series Complete Teardown, Cleaning, And Reassembly - Page 25
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(see
Figure
74). If the fit of the 1.5mm driver feels loose
in the setscrews, try using a 1/16" driver, which is
slightly larger than the 1.5mm driver (only use this if it
fully seats).
Figure 74 – Start both setscrews into pillar arm casting
Use a toothpick to apply purple Loctite® (item S3 of
Appendix 3)
to the exposed threads of the two M3X5
setscrews (see
Figure
75) and then tighten them down
to secure the pinion assembly into the pillar arm
casting. Be sure apply the Loctite® sparingly, so as to
prevent the setscrew heads from filling with the
Loctite® as the setscrews are tightened down into the
pillar arm casting. The pinion assembly should move
into perfect alignment with the pillar arm casting as the
setscrews bite into the indexing holes in the brass
pinion mount.
Figure 75 – Apply Loctite® before tightening setscrews
Once the pinion assembly has been secured into the
pillar arm casting, rotate the pinion by spinning the gear
on the right-hand side of the pillar arm and note how
the rotation feels. Tighten the slotted brass retaining
ring on the left-hand side to the point where the
rotation just begins to feel rough, then back it off a bit
until it feels smooth again. With the slotted brass
retaining ring in this position, verify that there is no end
play of the steel pinion. Apply blue Loctite® (item S2 of
Complete Teardown, Cleaning, and Reassembly of the Olympus BH-2 Coaxial Focus Mechanism
Appendix
3) to secure the slotted brass retaining ring to
the threads of the steel pinion (see
Figure 76 – Apply Loctite® to secure the retaining ring
Reinstall the Coarse-Focus Shaft
Apply a coating of grease to the metal bearing surface
of the gear-support base (see
Figure 77 – Apply grease to the bearing surface
From the right-hand side of the pillar arm, insert the
coarse-focus shaft into the hollow steel pinion and slide
it in until the greased bearing surface contacts the nylon
washer in the tension-adjustment knob (see
Be careful when inserting the shaft, so that the drive
gears are not damaged when they are pressed into
mesh with the gear on the steel pinion.
Figure 78 – Slide coarse-focus shaft into the hollow pinion
Figure
76).
Figure
77).
Figure
78).
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