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Teardown, Cleaning, and Reassembly of the Miscellaneous Parts of the Olympus BH-2 Microscope Frames

Revision 1

Page 1 of 45

Teardown, Cleaning, and Reassembly

of the Miscellaneous Parts of the

Olympus BH-2 Microscope Frames

Revision 1

Copyright © 2021 Carl Hunsinger

All rights reserved. This document may not be reproduced or distributed, in whole or in part, for any
commercial purpose without the express written consent of the author (

[email protected]

).

Permission is hereby granted to distribute this PDF document in its entirety for personal, non-commercial
purposes  only,  provided  that  the  contents  are  not  modified  in  any  way,  including  the  copyright  notices
contained herein.  This document may be freely distributed on WWW, FTP, or BBS sites in accordance with
these  restrictions.    The  content  of  this  document  is  provided  for  informational  purposes  only,  with  no
expressed  or  implied  warranties  whatsoever,  including,  but  not  limited  to,  function,  suitability,  safety,
accuracy, or completeness of information.

Revision History

Revision

Description of Changes

Date

1

Initial Release

April 20, 2001

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Содержание BH2 Series

Страница 1: ...mail com Permission is hereby granted to distribute this PDF document in its entirety for personal non commercial purposes only provided that the contents are not modified in any way including the cop...

Страница 2: ...Clean Threads for the Locking Thumbscrew BHS BHT ____________________________________________ 18 Servicing the Old Style Slide Mount BHS BHT ___________________________________________________ 18 Cle...

Страница 3: ...d Tools Referenced in this Document ___________________________________________ 45 Parts Supplies and Tools____________________________________________________________________ 45 Sources for Parts Sup...

Страница 4: ...the locking thumbscrew 18 Figure 55 Clean threads of locking thumbscrew old style 18 Figure 56 Thoroughly clean slide mount base old style 19 Figure 57 Slide mount parts ready for use old style 19 Fi...

Страница 5: ...nstall screws to secure the retaining plate 28 Figure 108 Reinstall plastic gear collar onto the rotor 28 Figure 109 Secure the gear collar with two screws 28 Figure 110 Reinstall the slotted stop pin...

Страница 6: ...ed retaining ring 37 Figure 161 Unscrew and remove threaded retaining ring 38 Figure 162 Lift and remove the glass field exit lens 38 Figure 163 Blow loose dust from the glass lens 38 Figure 164 Clean...

Страница 7: ...us BH 2 Microscope Frames Revision 1 Page 7 of 45 Figure 190 Secure filter holder in recess of knurled ring 43 Figure 191 Light Exit Assembly ready for service 43 Figure 192 Dust cap for BHS BHSU ligh...

Страница 8: ...set slotted Lens Handling Suction Tool item 9 of Appendix 1 Lens Spanner Tool bent tips item 8 of Appendix 1 A Few Words about JIS Screws Screws with JIS heads are found in much of the older equipment...

Страница 9: ...used on the BHSU BHTU stands The BHS BHT locking thumbscrew includes a spring loaded plunger and consists of six separate parts This locking screw can be identified by the presence of the slotted end...

Страница 10: ...Figure 7 Mounting disk from an old binocular head Carefully place the circular dovetail of the mounting disk see Figure 7 into the dovetail recess for the viewing head using the circular dovetail to d...

Страница 11: ...e in the end of the plunger shaft see Figure 12 Figure 12 Carefully remove e clip from the plunger shaft Remove the clamp holding the mounting disk in place and remove the mounting disk from the dovet...

Страница 12: ...nt acetone to remove any grease or other contaminants from the bore of the stationary inner barrel of the locking thumbscrew see Figure 18 Figure 18 Clean the bore of the stationary inner barrel Use a...

Страница 13: ...igure 24 Figure 24 Insert plunger into bore of the inner barrel Apply a light coating of a suitable grease item 1 of Appendix 1 to the exposed threads of the stationary inner barrel of the locking thu...

Страница 14: ...t end Use a suitable clamp with non marring jaws to hold the mounting disk in the slid over position to keep the end of the plunger shaft exposed see Figure 30 Figure 30 Clamp mounting disk to keep sh...

Страница 15: ...locking thumbscrew the locking thumbscrew must be removed from the pillar arm so that any thick or hardened grease or contaminants can be removed from the threads and then reinstalled into the pillar...

Страница 16: ...nd a suitable solvent acetone to clean any grease or contaminants from the threads of the tapped hole in the pillar arm see Figure 41 Figure 41 Clean the threads of the tapped hole Reinstall the Locki...

Страница 17: ...w ready to provide many more years of trouble free service see Figure 35 Figure 47 Refurbished thumbscrew is ready for use Nosepiece Slide Mount There were two versions of nosepiece slide mounts used...

Страница 18: ...Figure 53 Figure 53 Remove the slide mount from the pillar arm Clean Threads for the Locking Thumbscrew BHS BHT Using a pipe cleaner and a suitable solvent e g acetone clean the inner threads of the t...

Страница 19: ...le slotted screwdriver loosen and remove the stop screw for the nosepiece slide mount locking block see Figure 58 Figure 58 Remove the locking block stop screw Using a suitable slotted screwdriver loo...

Страница 20: ...unt base making sure the bearing surface of the locking block is in contact with the mount base see Figure 64 Figure 64 Position locking block under slide mount base Align the pivot screw hole in the...

Страница 21: ...Using a suitable JIS screwdriver reinstall the three m2 6x5 screws to secure the nosepiece slide mount to the BHS BHT pillar arm see Figure 70 Figure 70 Secure nosepiece slide mount with screws Reinst...

Страница 22: ...sembly from the base casting see Figure 77 being very careful so as to not damage the Light Exit Assembly with the field diaphragm assembly the two assemblies are very close in proximity and the refle...

Страница 23: ...ar from the diaphragm rotor if it will come loose See Figure 81 Figure 81 Lift and remove the plastic gear collar Using a suitable JIS screwdriver loosen and remove the four m2 6x5 screws securing the...

Страница 24: ...to clean them If the leaves are plastic do not use acetone but instead use a plastic safe solvent such as alcohol Figure 88 Thoroughly clean the diaphragm leaves Using a suitable solvent thoroughly c...

Страница 25: ...he pivot pin on the end with the relief notch see Figure 90 if applicable into one of the pivot holes in the metal diaphragm stator See Figure 92 Figure 92 Reinstall first diaphragm leaf into the stat...

Страница 26: ...ighth leaf the end with the relief notch if applicable under the lifted ends of the existing leaves and place the pivot pin into the appropriate hole beneath the lifted leaves Use the pencil markings...

Страница 27: ...e metal diaphragm stator The two orthogonally located holes for the screws should be in the position shown in Figure 105 Figure 105 Orientation of the screw holes in the rotor If the two orthogonal sc...

Страница 28: ...tor Using a suitable JIS screwdriver reinstall the two m2 6x5 screws to secure the plastic gear collar in place on the diaphragm rotor See Figure 109 Figure 109 Secure the gear collar with two screws...

Страница 29: ...tator See Figure 115 Figure 115 Lift and remove the plastic rotor from stator Beneath the diaphragm rotor there are 10 diaphragm leaves positioned within the circular recess of the metal diaphragm sta...

Страница 30: ...ate with the four tapped holes in the stator See Figure 118 Figure 118 Reinstall brass retaining plate onto stator Using a suitable JIS screwdriver reinstall the four m2 6x5 screws to secure the brass...

Страница 31: ...nlet Assembly BHT BHTU Using a 1 3mm or 050 hex tool loosen and remove the two m2 6x3 setscrews securing the Light Inlet Assembly into the bore of the base casting see Figure 125 Figure 125 Remove set...

Страница 32: ...and remove adiabatic glass disk Remove the upper spacer tube from within the metal barrel see Figure 130 Figure 130 Remove the upper spacer tube Use a suitable lens suction tool item 9 of Appendix 1 t...

Страница 33: ...the lower retaining ring Use a suitable lens suction tool item 9 of Appendix 1 to carefully lift and remove the lower frosted glass disk from within the metal barrel see Figure 137 Figure 137 Careful...

Страница 34: ...onto the lower retaining ring within the metal barrel see Figure 141 Figure 141 Place collector lens into metal barrel Carefully place the lower spacer tube into the metal barrel and press it down un...

Страница 35: ...aining ring to the glass disk The Light Inlet Assembly is now ready to be reinstalled into the microscope stand see Figure 148 Figure 148 Ready to reinstall the Light Inlet Assembly Reinstall Light In...

Страница 36: ...ons are shown in top view in Figure 153 and in bottom view in Figure 154 with the plastic metal version on the left and the all plastic version on the right in both figures Figure 153 Top view of the...

Страница 37: ...he filter holder in place in the recess of the knurled field adjustment ring see Figure 156 Figure 156 Remove screws securing the filter holder Lift and remove the filter holder from the recess in the...

Страница 38: ...f Appendix 1 to remove as much loose dust and debris as possible from the glass field exit lens see Figure 163 Figure 163 Blow loose dust from the glass lens Use a suitable lens cleaning solution and...

Страница 39: ...ws securing the frame of the Light Exit Assembly to the base casting of the stand see Figure 168 Figure 168 Remove screws securing frame to the base Carefully lift and remove the frame of the Light Ex...

Страница 40: ...ush item 10 of Appendix 1 to carefully clean the wetted reflective surface of the mirror by gently wiping the surface with the soft bristled brush see Figure 175 Figure 175 Carefully clean the primary...

Страница 41: ...n the base casting making sure you do not touch or damage the fragile primary surface mirror see Figure 180 Figure 180 Re install Light Exit frame into base cutout Align the three holes in the Light E...

Страница 42: ...oil to the plastic filter holder Place the filter holder into the center recess of the knurled field adjustment ring see Figure 186 Figure 186 Place the filter holder into recess of field ring Rotate...

Страница 43: ...Although this collimation is not strictly required1 it should be done if you wish to obtain the best optical performance that your microscope is capable of providing A Few Words About Dust Protection...

Страница 44: ...available for download at various microscope related hobbyist sites on the internet These can be found by searching for the titles in an internet search engine such as Google Olympus Research Microsco...

Страница 45: ...3 Super Lube Synthetic Oli w PTFE 4oz Super Lube 51004 Amazon 10 99 4 Sparkle Lens Cleaning Solution CLS Amazon 18 43 5 Lens cleaning Tissue 50 sheets Tiffen Amazon 8 95 Table 1 Supplies for servicing...

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