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THE AM BULLETIN BOARD => Technical Forum => Topic started by: KB5MD on September 18, 2022, 01:54:19 PM

Title: Freeing stuck switches
Post by: KB5MD on September 18, 2022, 01:54:19 PM
Does anyone have a method of freeing up frozen wafer switches.  I am trying to restore a Johnson Ranger II and a couple of the wafer switches are frozen.

Title: Re: Freeing stuck switches
Post by: W1ITT on September 18, 2022, 07:00:56 PM
I suspect, from past experience, that the problem is primarily in the bushings and bearings.  My latest penetrant du jour Is DeepCreep, made by the SeaFoam people, available at auto parts stores.  I'd spray some into a soda bottle cap, then wick it into the bearings with a Q-tip and/or a toothpick.  Just don't get any of that stuff on any phenolic parts.  It might be worth just trying to move the contacts up from the wiper with a knife blade, just so you are confident that nothing is corroded on.
My local mechanic told me about a "new and improved" penetrant by the name of SuperZilla.  I haven't tried it yet, but I might.  But DeepCreep has solved most of my problems.  Easy does it.
73 de Norm W1ITT

Title: Re: Freeing stuck switches
Post by: W7TFO on September 18, 2022, 07:31:54 PM
I've tried "SuperZilla", and it does everything it says it will.

It goes where nothing else does and gets things to move easily.

Oddly enough, it will free a stuck injector in Diesel engines. 

Put some in the tank, start it up, and let it run a while.

Weird, but effective.


Title: Re: Freeing stuck switches
Post by: MikeKE0ZUinkcmo on September 22, 2022, 09:31:32 PM
I use Acetone, applying a couple drops at the opening of the retaining clip on the shaft.   It often frees the shaft within a few seconds, as it is a very thin solvent.   Once operating freely, I apply a drop of Remington's Rem Oil.

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