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Complete Teardown, Cleaning, and Reassembly of the Olympus BHSU/BHTU Reverse Nosepiece Assembly

 

 

Revision 3

       

Page 16 of 19 

 

Figure 45 

 Reinstall the knurled-rubber grip ring 

Use dry cotton swabs to thoroughly remove any visible 
silicone RTV squeeze-out (see 

Figure 46

). 

 

Figure 46 

 Remove any silicone RTV squeeze-out 

Reinstall the Wedge Mount and Corrective Optics 

In  order  to  guarantee  proper  optical  alignment  of  the 
turret  assembly,  and  in  order  to  minimize  the 
mechanical  strain  in  the  corrective-optics  assembly  for 
polarizing  work,  reinstall  the  wedge  mount  and 
corrective-optics assembly per the following procedure.  
Place  the  wedge  mount  in  position  on  the  stationary 
base  of  the  turret  assembly,  aligning  the  four  screw 
holes in the wedge mount with the tapped holes in the 
stationary base (see 

Figure 47

). 

 

Figure 47 

 Place the wedge mount in position 

While  holding  the  wedge  mount  in  this  position,  place 
the  threaded  end  of  the  corrective-optics  assembly 
through the center bore of the wedge mount and screw 
the  corrective-optics  assembly  into  the  tapped  center 
bore of the stationary base (see 

Figure 48

).  Tighten the 

corrective-optics  assembly  until  it  is  hand  tight,  then 
back  it  off  approximately  ¼  turn.    The  barrel  of  the 
corrective-optics  assembly  fits  the  hole  in  the  wedge 
mount  with  very  tight  tolerances,  and  this  precision  fit 
holds the wedge mount in the proper physical location 
so that the mounting screws can be reinstalled.  

 

Figure 48 

 Reinstall the corrective-optics assembly 

Use a suitable JIS screwdriver to reinstall four M2.6X25 
pan-head  screws  to  secure  the  wedge  mount  onto  the 
stationary base of the turret assembly (see 

Figure 49

).

 

 

Figure 49 

 Reinstall screws to secure the wedge mount 

Use  non-marring  pliers  or  a  suitable  strap  wrench  to 
grip  the  barrel  of  the  corrective-optics  assembly  and 
tighten  the  corrective-optics  assembly  a  bit  beyond 
hand tight (see 

Figure 50

).   

Содержание BHSU

Страница 1: ...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...

Страница 2: ...chanical Detent Stop 10 Remove the Black Knurled Rubber Grip Ring 10 Remove the Threaded Retaining Ring 10 Remove the Perimeter Bearing Balls 11 Remove the Stationary Base from the Turret 11 Thoroughl...

Страница 3: ...n the slotted lock ring 9 Figure 16 Remove the slotted lock ring 9 Figure 17 Remove the pivot adjustment screw 9 Figure 18 Remove the center pivot bearing ball 10 Figure 19 Remove the screws securing...

Страница 4: ...silicone RTV to revolving turret 15 Figure 45 Reinstall the knurled rubber grip ring 16 Figure 46 Remove any silicone RTV squeeze out 16 Figure 47 Place the wedge mount in position 16 Figure 48 Reinst...

Страница 5: ...he Olympus BHSU and BHTU microscope stands Note that the original Olympus service literature did not address the teardown and repair of the various revolving nosepiece assemblies used on BH 2 stands a...

Страница 6: ...st of solvents generally considered safe for nylon includes acetone diethyl ether heptane mineral spirits naphthalene and turpentine Before Starting with the Overhaul Before beginning the removal and...

Страница 7: ...ing the wedge mount to the stationary base of the turret assembly see Figure 6 It is important to remove these four screws before attempting to remove the corrective optics assembly to prevent the bar...

Страница 8: ...pivot adjustment screw unless you have access to such a tool since the slot in the lock ring will likely be damaged if you use an improper tool making removal of the lock ring much more difficult1 A...

Страница 9: ...g the knurled rubber grip ring on the outer perimeter of the revolving turret and use the slotted screwdriver with the notched tip see Figure 13 to loosen the slotted lock ring securing the pivot adju...

Страница 10: ...ent damaging the screw heads It might also be helpful to heat the screws with a heat gun before loosening them but do not melt the black knurled rubber grip ring in the process Figure 19 Remove the sc...

Страница 11: ...th the threaded retaining ring do not fall out and become lost in the process see Figure 24 Figure 24 Remove the threaded retaining ring Remove the Perimeter Bearing Balls Carefully remove the 3 32 be...

Страница 12: ...rease for the bearing balls Reinstall the Perimeter Bearing Balls Use tweezers to carefully set the 3 32 bearing balls there are 80 of them into the grease ring see Figure 29 placing the bearing balls...

Страница 13: ...at 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 subsequ...

Страница 14: ...t 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...

Страница 15: ...o the stationary base see Figure 43 Figure 43 Secure protective cover using three screws Reinstall the Knurled Rubber Grip Ring The final assembly step for the turret assembly is to reinstall the blac...

Страница 16: ...sition While holding the wedge mount in this position place the threaded end of the corrective optics assembly through the center bore of the wedge mount and screw the corrective optics assembly into...

Страница 17: ...anical detents thereby maximizing the useful service life of the reverse nosepiece assembly Follow the procedures detailed in this document to remove the reverse nosepiece assembly from the microscope...

Страница 18: ...may be encountered if the threaded retaining ring has not been properly snugged down or if the center pivot adjustment screw has not been properly adjusted to remove the play in the center pivot mech...

Страница 19: ...on 5 40 4 Bearing balls stainless steel 1 4 G25 25 count various Amazon 4 95 5 Pliers soft jaw Non Scratch Pliers Micro Mark 85161 34 95 Pliers soft jaw Tamiya 74061 Amazon 32 64 6 Lens spanner tool p...

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