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