Thu Apr 27, 2023 12:55 am
I wonder how many STH/STL-10 siren motors look like that inside considering the motor is top-mounted. Any idea how old the siren is? I wonder if the weather seals wore out or if it was serviced in the past and not sealed back up properly.
It all looks like surface rust to me. To be safe, I'd take it to an electric motor shop and get their opinion. Considering we're talking about the inside of an electric motor, I'm not sure just cleaning the rust off with a wire brush and applying some kind of rust treatment is the best way to go.
~1950 Federal Enterprises Model 5 - 12-port
1995 AM General M35A3