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    Re: Sextant AN 5851-1
    From: Robert Eno
    Date: 2004 Jun 3, 08:51 +0100

    >I have a Navy Mark V (AN 5851-1) sextant which I purchased last winter
    and
    >have been using occasional.  When I purchased the sextant it had not been
    >used for a very long time I removed all of the housing and cleaned it in
    >it's entirety.  The bubble on recite was very large and unadjustable but
    >with the replacement of the o ring at the thimble pressure pump and
    >persistent attempts at using it I was able to get the bubble to adjust
    from
    >large to small and back.  I would also like to note that since I a have
    >received the instrument I has had a distinct sent which could be the
    bubble
    >fluid and that the I have stored it with this loose per a note typed on a
    >piece of paper in the box which reads as follows. " Important, Always
    return
    >bubble control nut to neutral when not using the instrument. (nut should
    >spin freely) Leaving pressure on diaphragm damages bubble unit beyond
    >repair."
    >
    >Recently I took the unit out of it's case for the first time in a month
    and
    >the bubble is back to it's large size and I am not able to reduce it.  I
    am
    >wondering of the fluid needs to be refilled. If so what is the fluid and
    >where does one get the fluid and how is refilling it accomplished?  Is
    the
    >diaphragm damaged? If it is how can I repair or replace it?  I would
    greatly
    >appreciate any questions and assistance that one might give me.
    >
    >Sincerely,
    >
    >Peter Henry
    
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