Olympus BH-2 - Match Selector Dial with Low-Power Objective; Replace Eyepiece with Phase-Centering Telescope; Focus the Phase-Centering Telescope

Complete Teardown, Cleaning, and Reassembly of the Olympus BH-2 Coaxial Focus Mechanism Revision 4 Page 4 of 40
Figure 13 – Remove the caps from the fine-focus knobs ..................................................................................................... 11
Figure 14 – Insert Allen drivers into screws in both knobs ................................................................................................... 12
Figure 15 – Remove fine-focus knob from shaft (left side) .................................................................................................. 12
Figure 16 – Plastic gear in the right-hand fine-focus knob ................................................................................................... 12
Figure 17 – Withdraw the fine-focus shaft (right side) ......................................................................................................... 12
Figure 18 – A view of the fine-focus gear cluster ................................................................................................................. 13
Figure 19 – A view of the fine-focus thrust washers ............................................................................................................ 13
Figure 20 – Remove the nylon thrust washer ....................................................................................................................... 13
Figure 21 – Remove screws holding the coarse-focus knob ................................................................................................. 13
Figure 22 – Remove the left-hand coarse-focus knob .......................................................................................................... 14
Figure 23 – Remove the stop screw for the lock collar ......................................................................................................... 14
Figure 24 – Loosen setscrews holding brass shaft mount .................................................................................................... 14
Figure 25 – Hold the brass shaft mount stationary .............................................................................................................. 14
Figure 26 – The loose brass shaft mount .............................................................................................................................. 15
Figure 27 – Spring and washer under brass shaft mount ..................................................................................................... 15
Figure 28 – Loosen and remove the pre-focus lock collar .................................................................................................... 15
Figure 29 – Remove the nylon thrust washer ....................................................................................................................... 15
Figure 30 – Remove the rotating lock ring ............................................................................................................................ 15
Figure 31 – Remove screws holding the threaded lock ring ................................................................................................. 16
Figure 32 – Remove threaded lock ring from pillar arm ....................................................................................................... 16
Figure 33 – The fine-focus gear cluster ................................................................................................................................. 16
Figure 34 – Remove screws holding gear-retaining ring ....................................................................................................... 16
Figure 35 – Remove the brass gear-retaining ring ................................................................................................................ 16
Figure 36 – The gear-retaining ring has been removed ........................................................................................................ 17
Figure 37 – Remove the top (right-most) drive gear ............................................................................................................ 17
Figure 38 – Remove the middle drive gear ........................................................................................................................... 17
Figure 39 – Remove the bottom (left-most) gear ................................................................................................................. 17
Figure 40 – Rear view of the right-hand coarse-focus knob ................................................................................................. 17
Figure 41 – Grease lower pin of bottom (left-most) gear ..................................................................................................... 18
Figure 42 – Place bottom (left-most) drive gear in position ................................................................................................. 18
Figure 43 – Grease the lower pin of the middle gear ........................................................................................................... 18
Figure 44 – Place the middle drive gear in position .............................................................................................................. 18
Figure 45 – Grease lower pin of top (right-most) drive gear ................................................................................................ 18
Figure 46 – Place top (right-hand) drive gear in position ..................................................................................................... 18
Figure 47 – Grease the top pins of all three gears ................................................................................................................ 19
Figure 48 – Gear-retaining ring in position over the gears ................................................................................................... 19
Figure 49 – Reinstall screws to secure gear-retaining ring ................................................................................................... 19
Figure 50 – Withdraw the coarse-focus shaft from pinion ................................................................................................... 19
Figure 51 – Loosen setscrews holding the pinion assembly ................................................................................................. 20
Figure 52 – Withdraw pinion assembly from the pillar arm ................................................................................................. 20
Figure 53 – Unscrew the tension-adjustment knob ............................................................................................................. 20
Figure 54 – Remove the nylon tension washer ..................................................................................................................... 20
Figure 55 – Remove the metal wave tension washer ........................................................................................................... 21
Figure 56 – Heat the slotted brass retaining ring ................................................................................................................. 21
Figure 57 – Grip the gear end with non-marring pliers ........................................................................................................ 21
Figure 58 – Remove the slotted brass retaining ring ............................................................................................................ 21
Figure 59 – Bearing balls in the retaining-ring end ............................................................................................................... 21
Figure 60 – Bearing balls removed from retaining-ring end ................................................................................................. 22
Figure 61 – The bearing balls removed from gear end ......................................................................................................... 22