Olympus BH2-BI30, Complete Teardown, Cleaning, And Reassembly

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Complete Teardown, Cleaning, and Reassembly of the Olympus BH2-BI30 Binocular Viewing Head
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Table of Contents
Introduction ............................................................................................................................................................................ 7
Scope of this Document .......................................................................................................................................................... 7
Before Attempting Your Own Service ..................................................................................................................................... 7
Common Problems with the BH2-BI30 Head .......................................................................................................................... 7
Interocular-Distance Slide is Stiff or Seized ........................................................................................................................ 7
Focus Ring on Left-Hand Ocular Tube is Stiff or Seized ...................................................................................................... 7
Internal Optics are Dirty ...................................................................................................................................................... 7
Optical Alignment is Poor ................................................................................................................................................... 8
Left-Hand and Right-Hand Side Designations ......................................................................................................................... 8
Tools Needed .......................................................................................................................................................................... 8
Electric Heat Gun .................................................................................................................................................................... 8
A Few Words about JIS Screws ............................................................................................................................................... 8
Disassembling the BH2-BI30 Viewing Head ............................................................................................................................ 8
Supplies Needed ..................................................................................................................................................................... 9
Recommended Solvents ......................................................................................................................................................... 9
Safety Considerations with Solvents ....................................................................................................................................... 9
Solvent Compatibility with Parts and Finishes ........................................................................................................................ 9
Recommended Lubricants ...................................................................................................................................................... 9
Label Parts for Identification and Reassembly ........................................................................................................................ 9
Servicing the BH2-BI30 Binocular Viewing Head .................................................................................................................... 9
Remove the Helical Focus Ring (Left) ................................................................................................................................ 10
Remove the Plastic Finger Grip (Left) ............................................................................................................................... 10
Remove the Plastic Finger Grip (Right) ............................................................................................................................. 11
Remove the Graduated Center Cover ............................................................................................................................... 11
Remove the Frame Assembly from the Main Housing ..................................................................................................... 12
Remove Mounting Disk Assembly from Main Housing .................................................................................................... 12
Reinstall Mounting Disk Assembly onto Main Housing .................................................................................................... 13
Remove the Tension Springs for the Follower Keys ......................................................................................................... 13
Remove the Follower Keys ................................................................................................................................................ 14
Clean Inner Tubes and Regrease the Helical Focus Ring................................................................................................... 14
Remove the Ocular Slide Assembly (Left) ......................................................................................................................... 17
Remove the Ocular Slide Assembly (Right) ....................................................................................................................... 18
Remove the Brass Pivot Lever ........................................................................................................................................... 18
Clean the Various Mechanical Parts ................................................................................................................................. 19
Remove the P3/P4 Prism Mount ...................................................................................................................................... 20
Reinstall the P3/P4 Prism Mount ...................................................................................................................................... 21
Clean the Various Optical Components ............................................................................................................................ 21
Lubricate the Various Slide Parts ...................................................................................................................................... 23
Reinstall the Ocular Slide Assembly (Left) ........................................................................................................................ 25
Reinstall the Ocular Slide Assembly (Right) ...................................................................................................................... 26
Grease the Follower-Key Slots in the Front Frame ........................................................................................................... 27
Reinstall the Follower Keys ............................................................................................................................................... 27
Reinstall the Tension Springs for the Follower Keys ......................................................................................................... 27
Reinstall the Frame Assembly into the Main Housing ...................................................................................................... 29
Reinstall the Graduated Center Plate ............................................................................................................................... 29
Reinstall the Plastic Finger Grips ....................................................................................................................................... 30
Reinstall the Helical Focus Ring (Left) – Most Accurate .................................................................................................... 31
Reinstall the Helical Focus Ring (Left) – Less Accurate ..................................................................................................... 32
Reinstall the Black Trim Ring for Ocular Tube (Right) ....................................................................................................... 32
Ready for Service .................................................................................................................................................................. 33