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Hello Federico,

Philip Lange pretty much beat me to the punch so I haven't got much to add
to his advice. It is hard for me to tell if the alidade is constructed of
aluminium or brass; if it is the former, and if the pivot is also aluminium,
you must choose your lubricant carefully. In my experience, aluminium
components rotating/pivoting within other aluminium components is bad news:
aluminium on aluminium tends to bind.

Good luck and please let us know how you make out with the cleaning.

As for servicing manuals, in the early 1990's, I tried, with no success, to
obtain such detailed information -- particularly pertaining to the Plath
bubble attachment -- from the company but to no avail. I believe the contact
person was a fellow by the name of Kai Stahl who was very hard to reach. At
the time, they seemed to be having some problems staying afloat. I visited
the factory a few years later and was given a tour of the place by Peter
Hein. By this time, I believe that C.Plath or rather their parent company,
Litton Industries, had sold their sextant manufacturing end to former
C.Plath employees who formed a company called "Hein and Oetting". A few
years after that, it appears that they discontinued manufacturing sextants.
Ken Gebhart, please feel free to step in and correct me on any of this as it
is all off the top of my head.  A quick search of the internet revealed that
Hein & Oetting are still alive and well and appear to be manufacturing
aircraft parts.

I keep hoping that someday one of the list members will come across a cache
of information but I fear that it was all destroyed. I understand that they
even destroyed the moulds for the Plath frames. Pity.

Robert

----- Original Message -----
From: "federico_genoa" 
To: "NavList" 
Sent: Thursday, May 17, 2007 1:55 AM
Subject: [NavList 2894] Re: Plath kriegsmarine sextant servicing


>
> Robert,
> I uploaded two pictures on Tynypics, you can find them at:
>
> http://tinypic.com/view.php?pic=4pyq5x2
>
> http://tinypic.com/view.php?pic=52w50g4
>
> Federico
>
> Robert Eno ha scritto:
>
>> Fredrico,
>>
>> If you send a photo of the front and rear of the sextant, I may be able
>> to
>> assist. I have taken a lot of these apart.  They are generally very easy
>> to
>> service.
>>
>> Robert
>> ----- Original Message -----
>> From: "federico_genoa" 
>> To: "NavList" 
>> Sent: Wednesday, May 16, 2007 4:28 PM
>> Subject: [NavList 2890] Plath kriegsmarine sextant servicing
>>
>>
>> >
>> > Hello to everybody,
>> > I've recently bought a Plath kriegsmarine sextant (aluminum frame) on
>> > eBay and I'm giving it a good clean.
>> > I've easily removed the mirrors, filters, micrometer, etc from the
>> > frame but I can't figure out how to remove the alidade.
>> > Can anyone help with suggestions or a sketch? Do you know if a
>> > servicing manual for Plath sextants exists?
>> > Yhanks.
>> > Federico
>> >
>> >
>> > >
>> >
>
>
> >
>



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