[GreenKeys] Questions About an AN/TGC-14(V)

[David S]

I don't know how useful or accurate this is, hopefully someone will 
correct me if I have a bad method.  I have seen these odd spots on 
rubber and plastic parts in my machines.  If the rubber is otherwise ok, 
I have been taking an exacto knife and very carefully and gently 
scraping the spots off.  When scraping I am using a magnifying light 
from a craft store.  I am using silicone oil or silicone grease on 
rubber to hopefully preserve these parts a bit.  Silicone based oils are 
better for rubber and plastics from my reading.  I have only needed to 
replace one rubber sheathing so far, and used modern shrink tube for 
this.  It does not look completely period correct, but this particular 
wire was fortunately out of sight normally.

I have seen video of typewriters with very badly aged rubber, I have 
been lucky with my devices that the rubber is generally in good shape.

On 4/16/2026 10:29 PM, Fabiolah via GreenKeys wrote:
>
>
> Now, this is addressed to you and anyone else who may have 
> information. Flipping open the lift panel, I saw a cable with white 
> spots that I think I’ve read about before, as I’ve seen it on the 
> cables in one of my electric typewriters. It’s related to moisture 
> reacting with the rubber hosing, right? Or wrong, lol. How would one 
> go about replacing the rubber? Is it very involved? Does it hurt to 
> leave it (or them, if I see any other rubber with the same affliction) 
> like that? I don’t plan on doing it quite yet. I think I’ll be taking 
> this one small step at a time. Thank you for your time!
>
>
> Fabiolah
>
>
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