Cleaning A Model 28 TD

28 TD before cleaning

After cleaning a carbruetor that was not really dirty, my Harbor Freight Ultrasonic Cleaner had clean solution left.
I wanted to see what the Ultrasonic Cleaner could do with a piece of Teletype gear.
This TD is a spare unit. I gave it a try.

28 TD in the Ultrasonic leaner

The solution as aproximately 90% hot water and 10% Harbor Freight Degreaser.
The magnet is above the solution.
I ran it for about ten minutes, turning it occasionally, always keeping the magnet dry.
I scrubbed a few spots with a toothbrush dipped in the solution.
I rinsed it off with hot running water and dried it with an air hose.

28 TD after cleaning,
Quite a difference!

Of course it will need completely re-lubricated.
The one thing I might do differently next time is take the cover off
the contact assembly to give it a thorough cleaning also.

By the way, the solution ended up filthy dirty and had to be dumped.