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Complete Teardown, Cleaning, and Reassembly of the Olympus BH2-BI30 Binocular Viewing Head

 

(

Rev. 1)

 

Page 12 of 34

 

 

Figure 15 – Remove the center cover from the frame 

Remove the Frame Assembly from the Main Housing 

Adjust  the  interocular-distance  slide  such that the four 
M3x6  JIS  screws  securing  the  B2-BI  frame  assembly  to 
the  B2-BIC  main  housing  assembly  are  accessible  (see 

Figure 16

). 

 

Figure 16 – Screws securing front frame to the main housing 

Use a suitable JIS screwdriver to remove the four M3x6 
JIS  screws  securing  the  B2-BI  frame  assembly  to  the 
B2-BIC main housing assembly (se

Figure 17

). 

 

Figure 17 – Remove screws securing front frame to housing

 

Carefully  remove  the  B2-BI  frame  assembly  from  the 
B2-BIC  main  housing  assembly  (see 

Figure  18

),  being 

careful  not  to  damage  or  smudge  the  prisms  in  the 
process. 

 

Figure 18 – Remove frame assembly from main housing 

Remove Mounting Disk Assembly from Main Housing 

For  routine  cleaning  and  lubrication  of  the  BH2-BI30  binocular 
viewing head, there is no reason to remove the mounting disk from 
the  main  housing,  but  the  removal  and  reinstallation  procedure  is 
included below for the sake of completeness of this document. 

INCLUDED FOR REFERENCE 

Apply  adhesive  tape  to  the  outer  surface  of  the  main 
housing  to  mark  the  position  in  which  mounting  disk 
assembly  is  currently  installed.    This  will  allow  the 
mounting disk assembly to be reinstalled into the same 
relative position later, thereby minimizing any effect of 
P1/P2  prism  misalignment  on  the  optical  performance 
of the reassembled viewing head (se

Figure 19

). 

 

Figure 19 – Apply tape to mark placement of mounting disk 

Use  a  suitable  JIS  screwdriver  to  remove  the  three 
M3x8  JIS  screws  securing  the  mounting  disk  assembly 
onto the main housing (see 

Figure 20

). 

 

Figure 20 – Remove screws securing mounting disk assembly 

Summary of Contents for BH2-BI30

Page 1: ...ermission 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 not...

Page 2: ...ter 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...

Page 3: ...Figure 17 Remove screws securing front frame to housing 12 Figure 18 Remove frame assembly from main housing 12 Figure 19 Apply tape to mark placement of mounting disk 12 Figure 20 Remove screws secu...

Page 4: ...3 Clean old grease from bevels of slide left 20 Figure 64 Clean old grease from back of slide right 20 Figure 65 Clean old grease from back of slide left 20 Figure 66 Clean old grease from both doveta...

Page 5: ...ollower key right 27 Figure 110 Align coil of straight spring with hole right 28 Figure 111 Secure the straight spring with screw right 28 Figure 112 Hook bent spring over follower key left 28 Figure...

Page 6: ...BI30 Binocular Viewing Head Rev 1 Page 6 of 34 Figure 136 Place trim ring over the ocular tube right 33 Figure 137 Press trim ring into adhesive to seat it right 33 Figure 138 The Olympus BH2 BI30 rep...

Page 7: ...y the alignment of the BH2 BI30 optical path may be impacted to the extent that the viewing head may no longer pass the original Olympus factory specifications However these procedures do not typicall...

Page 8: ...d to intentionally cam out as a means to limit the torque applied to the fasteners Because of this crucial difference in the geometry of the two screw 1 Stripped fasteners and foul language will be th...

Page 9: ...etone commonly sold as fingernail polish remover diethyl ether heptane hexane mineral spirits turpentine and xylene Of the solvents listed 3 Attempt this ONLY if the ocular tubes are not already at th...

Page 10: ...the interocular distance slide such that the two M2 6x5 JIS screws securing the left hand finger grip to the left hand ocular slide are accessible from the rear of the unit see Figure 5 Figure 5 Scre...

Page 11: ...s securing finger grip right Use a suitable JIS screwdriver to remove the M2x10 JIS screw from the front of the right hand finger grip see Figure 11 Figure 11 Remove front screw from finger grip right...

Page 12: ...ess Figure 18 Remove frame assembly from main housing Remove Mounting Disk Assembly from Main Housing For routine cleaning and lubrication of the BH2 BI30 binocular viewing head there is no reason to...

Page 13: ...n the edges of the circular dovetail disk with the witness tapes applied earlier and tighten the three M3x8 JIS screws to secure the mounting disk assembly in its original position see Figure 24 Figur...

Page 14: ...crew securing the bent tension spring to the spring mounting bracket on the P3 P4 prism mount see Figure 29 and remove the bent tension spring see Figure 30 Figure 29 Remove the screw securing the ben...

Page 15: ...Use a suitable solvent e g acetone to thoroughly remove the old grease from the outer helicoid threads of the black helical tube see Figure 36 Figure 36 Clean old grease from the outer helicoid threa...

Page 16: ...helicoid tubes is necessary for the threads to go into engagement Keep trying and do not force it This may take a while Temporarily reinsert the ungreased polished inner tube with the black helical tu...

Page 17: ...this tab inserts into the notched hole inside the ocular tube Figure 47 Reinstall the fixed sleeve inner tube right Remove the Ocular Slide Assembly Left Use a suitable JIS screwdriver to remove the t...

Page 18: ...ift the right hand ocular slide assembly to disengage its lower bevel from the bottom dovetail in the front frame and carefully remove the right hand ocular slide assembly from the frame by pulling it...

Page 19: ...ring surface Use a suitable solvent e g acetone to remove the old grease from the dovetail bevels for the left hand and right hand ocular slides in the bottom channel of the front frame see Figure 60...

Page 20: ...ure 66 Clean old grease from both dovetail blocks Remove the P3 P4 Prism Mount For routine cleaning and lubrication of the BH2 BI30 binocular viewing head there is no reason to remove the P3 P4 prism...

Page 21: ...lens cleaning brush to remove any loose dust from the exposed face of the P1 columned prism in the center of the circular mounting dovetail on the bottom of the main housing this is a glass cylinder r...

Page 22: ...eve from the right hand ocular tube see Figure 76 Figure 76 Remove sleeve inner tube from ocular tube right If necessary use a hand held air blower and a dust free lens cleaning brush to remove any lo...

Page 23: ...se dust from the two exposed faces of the P6 prism Then use a pre moistened optical lens cleaning wipe item 7 of Appendix 1 to clean the two exposed faces of the P6 prism see Figure 82 and Figure 83 F...

Page 24: ...vot lever bearing surface of frame Apply a light coating of a suitable grease item 5 of Appendix 1 to the center hole and to the two end slots in the brass pivot lever see Figure 89 Figure 89 Apply gr...

Page 25: ...ages with the lower slot in the brass pivot lever see Figure 95 Be extremely careful during this process to neither scratch nor smudge the P6 prism in the process Figure 94 Seat lower bevel into the b...

Page 26: ...smudge the P5 prism in the process Figure 99 Seat lower bevel into bottom dovetail right Figure 100 Index pin engaged with brass pivot lever right Apply a light coating of a suitable grease item 5 of...

Page 27: ...ower keys through the left hand slot and into the tapped hole in the tab of the left hand polished inner tube see Figure 106 Figure 106 Reinstall the follower key into the slot left Position the right...

Page 28: ...d end of the bent tension spring over the left hand follower key as shown in Figure 112 Figure 112 Hook bent spring over follower key left Position the bent tension spring such that the coil in the sp...

Page 29: ...BI frame assembly into the main housing see Figure 118 Figure 118 Secure frame assembly into the main housing Reinstall the Graduated Center Plate Adjust the interocular distance slide for maximal sp...

Page 30: ...ximum spacing Place the left hand finger grip into position over the left hand ocular tube see Figure 124 Figure 124 Place the finger grip into position left Use a suitable JIS screwdriver to reinstal...

Page 31: ...secure the focus ring in position see Figure 131 Figure 130 Place helical focus ring onto ocular tube left Figure 131 Tighten set screws to secure helical focus ring Temporarily reinstall the BH2 BI30...

Page 32: ...the Helical Focus Ring Left Less Accurate Carefully adjust the black helical tube on the left hand ocular tube such that the top surface of the helical tube extends the same distance from the plastic...

Page 33: ...e Olympus BH2 BI30 repair manual In addition to the above referenced BH2 BI30 binocular viewing head repair manual a PDF of an early version of the Olympus BH2 BHS repair manual was also used see Figu...

Page 34: ...6 4 Tweezers precision set of 7 Oulii Amazon 9 99 Table 1 Tools referenced in this document Item Description Manufacturer Manufacturer Model Vendor Vendor Price 5 Molykote 44 Light grease5 28g Dow Cor...

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