Altimeter Disassembly

[Dick]

Received an old , externaly corroded Piper altimeter a while ago and I'd
like to take it apart for a look-see but can't figure how the guts mechanism
comes out. Presently have the glass lens, holder and knob off.

Any suggestions short of cutting the case in two <G> would be appreciated.

Thanks, Dick

[Dan, U.S. Air Force, retired]

Dick wrote:
> Received an old , externaly corroded Piper altimeter a while ago and I'd
> like to take it apart for a look-see but can't figure how the guts mechanism
> comes out. Presently have the glass lens, holder and knob off.
>
> Any suggestions short of cutting the case in two <G> would be appreciated.
>
> Thanks, Dick
>
>
Look at the back of the case for screws. The innards are mounted to the
back of the case.

Dan, U.S. Air Force, retired

[Ernest Christley]

Dan, U.S. Air Force, retired wrote:
> Dick wrote:
>
>> Received an old , externaly corroded Piper altimeter a while ago and
>> I'd like to take it apart for a look-see but can't figure how the guts
>> mechanism comes out. Presently have the glass lens, holder and knob off.
>>
>> Any suggestions short of cutting the case in two <G> would be
>> appreciated.
>>
>> Thanks, Dick
>>
> Look at the back of the case for screws. The innards are mounted to the
> back of the case.
>
> Dan, U.S. Air Force, retired
>

Dan, can it be opened without destroying the instrument?

I have a Garwin, Inc. altimiter. Serial number 721, dated Mar 29 1962.
It's in working condition, and I'd like it to stay that way. It has
a little crust on the inside of the front glass. Not enough for me to
pay someone to clean it, but I'd like to run a damp cloth across it if I
could get to it.



--
This is by far the hardest lesson about freedom. It goes against
instinct, and morality, to just sit back and watch people make
mistakes. We want to help them, which means control them and their
decisions, but in doing so we actually hurt them (and ourselves)."

[Dan, U.S. Air Force, retired]

Ernest Christley wrote:
> Dan, U.S. Air Force, retired wrote:
>
>> Dick wrote:
>>
>>> Received an old , externaly corroded Piper altimeter a while ago and
>>> I'd like to take it apart for a look-see but can't figure how the
>>> guts mechanism comes out. Presently have the glass lens, holder and
>>> knob off.
>>>
>>> Any suggestions short of cutting the case in two <G> would be
>>> appreciated.
>>>
>>> Thanks, Dick
>>>
>> Look at the back of the case for screws. The innards are mounted to
>> the back of the case.
>>
>> Dan, U.S. Air Force, retired
>>
>
> Dan, can it be opened without destroying the instrument?
>
> I have a Garwin, Inc. altimiter. Serial number 721, dated Mar 29 1962.
> It's in working condition, and I'd like it to stay that way. It has
> a little crust on the inside of the front glass. Not enough for me to
> pay someone to clean it, but I'd like to run a damp cloth across it if I
> could get to it.
>
>
>
Sure can, just remove the faceplate. If you can find some gasket
material to replace the old one so much the better, in any even use a
pencil to make a witness mark on one side where the bezel meets the
case. It's going to take a razor blade to scrap the crust. Just be very
careful when you separate the bezel from the case. If it is internally
lit don't try to take the glass out of the bezel. In internally lit
instruments the glass is actually 2 wedge shaped pieces and lining them
up is a royal pain.

Make sure you leak check it when you are done.

Dan, U.S. Air Force, retired