Complete Teardown, Cleaning, and Reassembly of the Olympus BH-2 Coaxial Focus Mechanism Revision 4 Page 5 of 40
Figure 62 – Apply grease to upper face of the pinion gear ................................................................................................... 22
Figure 63 – Bearing balls on the top face of the gear ........................................................................................................... 22
Figure 64 – Lower brass pinion mount over steel pinion ..................................................................................................... 22
Figure 65 – Apply ring of grease to the retaining-ring end ................................................................................................... 23
Figure 66 – Place bearing balls in the retaining-ring end ..................................................................................................... 23
Figure 67 – Reinstall the slotted brass retaining ring ........................................................................................................... 23
Figure 68 – Reinstall the greased metal wave washer.......................................................................................................... 23
Figure 69 – Reinstall the greased nylon tension washer ...................................................................................................... 24
Figure 70 – Reinstall the tension-adjustment knob .............................................................................................................. 24
Figure 71 – Snug the tension-adjustment knob .................................................................................................................... 24
Figure 72 – Slide the pinion assembly into the pillar arm .................................................................................................... 24
Figure 73 – A view of the indexing holes in the pinion mount ............................................................................................. 24
Figure 74 – Start both setscrews into pillar arm casting ...................................................................................................... 25
Figure 75 – Apply Loctite® before tightening setscrews ....................................................................................................... 25
Figure 76 – Apply Loctite® to secure the retaining ring ........................................................................................................ 25
Figure 77 – Apply grease to the bearing surface .................................................................................................................. 25
Figure 78 – Slide coarse-focus shaft into the hollow pinion ................................................................................................. 25
Figure 79 – Reinstall the threaded lock ring ......................................................................................................................... 26
Figure 80 – Reinstall the rotating lock ring ........................................................................................................................... 26
Figure 81 – Lightly grease threads of threaded lock ring ...................................................................................................... 26
Figure 82 – Reinstall the pre-focus lock collar ...................................................................................................................... 26
Figure 83 – Reinstall nylon washer onto end of pinion mount ............................................................................................. 27
Figure 84 – Place the rear loop of spring over stop screw.................................................................................................... 27
Figure 85 – Place front loop of the spring over stop screw .................................................................................................. 27
Figure 86 – Reinstall setscrews to lock brass shaft mount ................................................................................................... 28
Figure 87 – Reinstall slotted stop screw for the lock collar .................................................................................................. 29
Figure 88 – Reinstall the left-hand coarse-focus knob ......................................................................................................... 29
Figure 89 – Reinstall nylon washer onto the shaft mount .................................................................................................... 29
Figure 90 – Reinstall spring washer over the nylon washer ................................................................................................. 29
Figure 91 – Slide fine-focus shaft into coarse-focus shaft .................................................................................................... 30
Figure 92 – Reinstall the fine-focus knob (left side shown) .................................................................................................. 30
Figure 93 – Reinstall screw to secure the second knob ........................................................................................................ 30
Figure 94 – Reinstall the top screw to hang the focus rack .................................................................................................. 30
Figure 95 – Reinstall the lower screw for the focus rack ...................................................................................................... 31
Figure 96 – Grease the teeth of the focus rack (optional) .................................................................................................... 31
Figure 97 – Remove two setscrews securing the gears ........................................................................................................ 31
Figure 98 – Press both gear pins free of the housing ........................................................................................................... 31
Figure 99 – The fully disassembled focus gearbox................................................................................................................ 32
Figure 100 – Washer and pin ready to receive the first gear ............................................................................................... 32
Figure 101 – The first gear held in place by the gear pin ...................................................................................................... 32
Figure 102 – Insert nylon washer on opposite side of pin .................................................................................................... 32
Figure 103 – Gear pin and first gear in final position ............................................................................................................ 33
Figure 104 – Washer and pin ready to receive second gear ................................................................................................. 33
Figure 105 – The second gear held in place by the gear pin ................................................................................................. 33
Figure 106 – Insert nylon washer on opposite side of pin .................................................................................................... 33
Figure 107 – Gear pins holding both gears ........................................................................................................................... 34
Figure 108 – Reinstall two setscrews to secure the gears .................................................................................................... 34
Figure 109 – Apply grease to the teeth of both gears .......................................................................................................... 34
Figure 110 – Stick shims onto flanges with dabs of grease .................................................................................................. 34
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