Olympus BHSU Complete Teardown, Cleaning, And Reassembly - Page 17

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Figure 50 – Tighten the corrective optics assembly

Reinstall the Reverse Nosepiece Assembly

Hold the reverse nosepiece assembly in place on the

top of the arm (see

Figure

holes in the arm with the tapped holes in the wedge

mount on the reverse nosepiece assembly (see

52).

Figure 51 – Hold reverse nosepiece assembly up to arm

Figure 52 – Align holes for the mounting screws

While holding the reverse nosepiece assembly in this

position, use a suitable JIS screwdriver to reinstall three

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

51) and align the three screw

Figure

M2.6X14 pan-head screws to secure the reverse

nosepiece assembly onto the arm (see

Figure 53 – Reinstall three screws to secure it to the arm

Ready for Service

The microscope stand with the newly reconditioned

reverse nosepiece assembly is now ready to be put back

into service.

Requirements for Periodic Maintenance

Periodic cleaning and application of fresh grease to the

mechanical detent notches in the stationary base is

necessary to minimize wear of the mechanical 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 stand, remove the

wedge mount and corrective-optics assembly, and then

remove the protective cover to expose the mechanical

detent notches. Next, clean and re-grease the exposed

mechanical detent notches and reassemble the reverse

nosepiece assembly, and then reinstall it onto the

microscope stand. If the equipment sees heavy usage,

this service should be performed on a six-month

interval

Problems with the Turret Assembly

A few problems with the turret assembly can

sometimes be found in the reassembled nosepiece. The

first will be seen if one or more of the mechanical

detents are excessively worn. This will cause radial float

of the revolving turret in one or more of the objective

positions, and these objectives will have trouble

returning to and maintaining their proper index

position.

This can make it difficult to utilize some

illumination types, such as phase contrast, since the

Field experience has shown that even heavily used scopes (such as those

used in hospitals and clinical lab settings), when lubricated on a six-month

interval, can be expected to provide many years of trouble-free service.

Figure

53).

Revision 3

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