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Complete Teardown, Cleaning, and Reassembly of the Olympus BH2-5RE Modular Revolving Nosepiece                

   

 

Page 3 of 18 

 

 

Revision 3 

Sources for Replacement Parts, Tools, and Supplies Referenced in this Document ........................................................ 18 

 

Table of Figures 

Figure 1 

 A typical JIS Screw .................................................................................................................................................. 5 

Figure 2 

 The BH2-5RE modular revolving nosepiece ........................................................................................................... 6 

Figure 3 

 Basic components of the BH2-5RE ......................................................................................................................... 6 

Figure 4 

 Remove four screws securing the dovetail slide .................................................................................................... 7 

Figure 5 

 Remove the loose dovetail slide ............................................................................................................................ 7 

Figure 6 

 Remove screws securing the cover in place .......................................................................................................... 7 

Figure 7 

 Remove the protective cover ................................................................................................................................. 7 

Figure 8 

 The turret assembly (without cover) ..................................................................................................................... 7 

Figure 9 

 Screwdriver modified to remove slotted lock ring ................................................................................................ 8 

Figure 10 

 Insert screwdriver into bores to lock turret ......................................................................................................... 8 

Figure 11 

 Loosen the slotted lock ring ................................................................................................................................. 8 

Figure 12 

 Remove the slotted lock ring ............................................................................................................................... 8 

Figure 13 

 Remove the pivot-adjustment screw ................................................................................................................... 9 

Figure 14 

 Remove the center-pivot bearing ball ................................................................................................................. 9 

Figure 15 

 Remove the screws securing the detent stop ...................................................................................................... 9 

Figure 16 

 Remove the loose mechanical detent stop .......................................................................................................... 9 

Figure 17 

 Remove the knurled-rubber grip ring .................................................................................................................. 9 

Figure 18 

 Components of the turret assembly .................................................................................................................. 10 

Figure 19 

 Loosen the threaded retaining ring ................................................................................................................... 10 

Figure 20 

 Remove the threaded retaining ring .................................................................................................................. 10 

Figure 21 

 Remove the perimeter bearing balls ................................................................................................................. 10 

Figure 22 

 Lift and remove the stationary base .................................................................................................................. 10 

Figure 23 

 Reinstall stationary base into revolving turret ................................................................................................... 11 

Figure 24 

 Apply ring of fresh grease for the bearing balls ................................................................................................. 11 

Figure 25 

 Place the bearing balls into the ring of grease ................................................................................................... 11 

Figure 26 

 Engage the threaded retaining ring ................................................................................................................... 11 

Figure 27 

 Tighten the threaded retaining ring ................................................................................................................... 11 

Figure 28 

 Remove any grease squeeze-out ....................................................................................................................... 12 

Figure 29 

 Apply grease to the center-pivot bore ............................................................................................................... 12 

Figure 30 

 Place bearing ball into the center-pivot bore .................................................................................................... 12 

Figure 31 

 Apply grease to the top of the bearing ball ....................................................................................................... 12 

Figure 32 

 Reinstall the pivot-adjustment screw ................................................................................................................ 12 

Figure 33 

 Reinstall the slotted lock ring ............................................................................................................................. 13 

Figure 34 

 Tighten the slotted lock ring .............................................................................................................................. 13 

Figure 35 

 Place the mechanical detent stop in position .................................................................................................... 13 

Figure 36 

 Secure the detent stop with two screws ........................................................................................................... 13 

Figure 37 

 Apply grease to the five detent notches ............................................................................................................ 14 

Figure 38 

 Place cover in position on the turret assembly .................................................................................................. 14 

Figure 39 

 Secure protective cover using three screws ...................................................................................................... 14 

Figure 40 

 Position dovetail slide onto stationary base ...................................................................................................... 14 

Figure 41 

 Secure dovetail slide onto stationary base ........................................................................................................ 14 

Figure 42 

 Apply black adhesive to revolving turret ........................................................................................................... 15 

Figure 43 

 Reinstall the knurled-rubber grip ring ................................................................................................................ 15 

Figure 44 

 Remove any adhesive squeeze-out .................................................................................................................... 15 

Summary of Contents for BH2-5RE

Page 1: ...ribute 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...

Page 2: ...onary Base from the Turret 10 Clean Grease from the Various Components 11 Reinstall Stationary Base into Revolving Turret 11 Apply Ring of Grease for the Perimeter Balls 11 Reinstall the Perimeter Bea...

Page 3: ...0 Figure 20 Remove the threaded retaining ring 10 Figure 21 Remove the perimeter bearing balls 10 Figure 22 Lift and remove the stationary base 10 Figure 23 Reinstall stationary base into revolving tu...

Page 4: ...lympus BH2 5RE Modular Revolving Nosepiece Page 4 of 18 Revision 3 Figure 45 BH2 5RE ready to be put back into service 15 Figure 46 Revolving turret with severely worn mechanical detents 17 Figure 47...

Page 5: ...on revolving modular nosepiece assembly used on the Olympus BHS BHSP BHT and BHTP microscope stands This procedure is also applicable the BH2 6RE six position modular revolving nosepiece assembly due...

Page 6: ...due to solvent absorption The list of solvents generally considered safe for nylon includes acetone diethyl ether heptane mineral spirits naphthalene and turpentine Before Starting the Overhaul Remove...

Page 7: ...ve unless the proper tool is used Do not attempt to remove the slotted lock ring from the pivot adjustment screw unless you have access to such a tool since the slot in the lock ring will likely be da...

Page 8: ...causing any damage to the fragile brass threads in the revolving turret Figure 10 Insert screwdriver into bores to lock turret Loosen and Remove the Slotted Lock Ring Hold the turret assembly by gras...

Page 9: ...taked in place with adhesive and can be surprisingly stubborn to remove so be sure to use the proper JIS screwdriver to prevent damaging the screw heads It might also be helpful to heat the screws wit...

Page 10: ...ter punch or nailset tool into one of the five detent notches in the revolving turret instead of into one of the four tooling holes in the threaded retaining ring or the revolving turret will be irrep...

Page 11: ...of the revolving turret see Figure 24 Do not apply too much grease here to minimize the squeeze out that will occur when the threaded retaining ring is reinstalled to hold the stationary base into the...

Page 12: ...that the center pivot bore has been greased reinstall the bearing ball into the freshly greased center pivot bore The grease will hold the center pivot bearing ball in the proper position during subs...

Page 13: ...with the other hand The motion of the turret should not feel gritty erratic or excessively stiff If it does loosen the slotted lock ring readjust the pivot adjustment screw and retighten the slotted...

Page 14: ...suitable JIS screwdriver to reinstall three M2X3 countersink screws to secure the protective cover onto the stationary base see Figure 39 Figure 39 Secure protective cover using three screws Reinstall...

Page 15: ...rubber grip ring Use dry cotton swabs lightly dampened with isopropyl alcohol to thoroughly remove any adhesive squeeze out see Figure 44 Figure 44 Remove any adhesive squeeze out Ready for Service Th...

Page 16: ...f the stationary base If there is excess play in the center pivot ball such that the turret is not held in the exact center point the whole turret may move slightly resulting in poor objective centeri...

Page 17: ...lored plating on the exposed surface When the hard plating in the area of the mechanical detents begin to wear away as a result of severe use without routine cleaning and re greasing of the detents th...

Page 18: ...document Item Description Manufacturer Manufacturer Model Vendor Vendor Price S1 E6000 adhesive black 2 oz E6000 Amazon 8 22 S2 Plastilube Brake Grease 75 cc Plastilube ATE70015 Amazon 10 88 Plastilu...

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