[GreenKeys] Cleaning a M28 tape puncher and m19 reader

[Randy or Sherry Guttery]

John D.Kopke wrote:
> 
> 
> 
> Hi All ,
> 
> Would it hurt anything  to put these units through the dishwasher... 
> I've also heard of people using kerosene to clean mechanical parts.

Strictly my opinion:

Any unit that is REALLY gunked up - goes through the dishwasher; however
all electronics (motors, coils, relays, switches, etc.) come off first.

Once through the dishwasher - then parts with more than a minor amount
of rust are treated with phosphoric acid (sold as Naval Jelly, etc.).

Then the parts are cleaned with mineral spirits. Parts that have
particularly stubborn "stuff" get lacquer thinner... but watch that
stuff - it's hard on your skin, and ain't good for your lungs.

Parts that have lost their zinc plating (phosphoric acid will flat
remove any plating) are shot with a coat of clear acrylic to give them
some rust proofing. Of course one needs to keep the spray out of working
surfaces - but since most teletype working parts stay oiled down - rust
shouldn't become a problem there, either.

An on-going project of a 28 is here, which includes some of the above 
"stuff":

http://www.comcents.com/tty/tty.php

best regards...
-- 
randy guttery

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