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8. MAINTENANCE
For faultless operation the telescope should be kept in cleanness and protected
against mechanical damage. The metal surfaces are periodically cleaned by using
clean soft napkins, then wiped with a napkin impregnated with acidless vaseline,
after that with a dry napkin.
The aluminized mirrors require particular care. The accumulated dust is
removed only with the use of a soft brush or cotton wool tampon. If a visual
inspection reveals the need to clean the main mirror prepare it as follows: remove
the eyepiece assembly with gearing, remove the screws , mark the position
of thread holes in mirror assembly for following reassembly, extract the mirror
assembly and place it with mirror surface upward. Clean the surface with soft
brush and then with cotton wool swab wetted with ether or alcohol. Residual
cotton fibers can be removed by air blasting.
The reassembly is done in reverse order. To avoid a readjustment of main mirror
the position of mirror assembly must correspond to the mark made previously.
The corrector should not be removed from the tube for cleaning. In the case
of need the meniscus surface is cleaned with removed main mirror assembly.
A cleaning of optical parts and adjusting of telescope is prohibited before
warranty expiration. It requires care and thoroughness and should be fulfilled in
the case of absolute necessity only.
