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

 

 

Revision 3

       

Page 12 of 19 

 

Figure 27 

 Reinstall stationary base into revolving turret 

Apply a Ring of Grease for the Perimeter Balls 

The  next  step  is  to  apply  grease  into  the  ring  in  which 
the  perimeter  bearing  balls  will  be  placed.    Carefully 
apply  a  ring  of  grease  (item  8  o

Appendix  1

)  into  the 

channel  formed  between  the  outer  perimeter  of  the 
stationary base and the inner perimeter of the revolving 
turret  (see 

Figure  28

).    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 recess of the revolving turret. 

 

Figure 28 

 Apply ring of fresh grease 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  as  close  together  as 

possible as you proceed.

 

 

Figure 29 

 Place the bearing balls into the ring of grease 

Reinstall the Threaded Retaining Ring 

Carefully  engage  the  threads  of  the  threaded  retaining 
ring with the threads in the revolving turret (see 

Figure 

30

). 

 

Figure 30 

 Engage the threaded retaining ring 

Use a suitable lens-spanner tool (item 6 o

Appendix 1

in  a  pair  of  opposing  tooling  holes  to  tighten  the 
threaded retaining ring

2

 (see 

Figure 31

). 

 

Figure 31 

 Tighten the threaded retaining ring 

 

2

 Or use a center punch or nailset tool to snug the threaded retaining ring by 

placing  the  tip  of  the  tool  into  one  of  the  four  tooling  holes  and  lightly 
tapping  the  tool  with  a  small  hammer  or  mallet  to  drive  the  threaded 
retaining ring clockwise.   

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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