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Filthy corroded T-Jet armatures? Cleaning help...


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#1 Ted Bier

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Posted 13 February 2020 - 09:45 AM

I have this collection of filthy, corroded T-Jet armatures on gear plates. They were in a pit case that was stored somewhere with a whole bunch of moisture.

 

Is there any saving them? Can I just put them in a cup of vinegar?  Or will that just destroy the armature wingdings?

 

Notice the rust on the pins of the armatures.

 

Help!

 

Thanks!

 

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#2 917-30

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Posted 13 February 2020 - 11:59 AM

I’ll be interested in answers to this - I recently got 9 or 10 Open arms (23, 24, 25) from, I think, around 1972. Definitely stored (along with 5 complete cars, 6 complete motors) in a moist environment, smelled like more than just a basement - chicken coop maybe?

Anyway, the arms, even in tubes, have corrosion not quite as bad as Ted’s stuff, but I’m assuming that the same techniques and cleaners/chemicals might work. I think I’ve seen here on Slotblog that ultrasonic cleaning can have some detrimental effects on older armatures.

But as a former Tjet racer, I’ve often wondered if anyone refaces the commutators. Maybe not enough shaft to grip or support, or not enough material to work with?

George Foster
Dabbling in Group 7 '68-'72, amazed and grateful that commercial slots still exist!

Big fan of 1/1 IMSA sports car racing, especially the endurance classics

Home track: Fantasy Raceways, Rochester, NY

R.I.P. Bob Emott


#3 drrufo

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Posted 13 February 2020 - 12:22 PM

Try an eraser or a fiberglas pen that is available at any electronic supply store. I use either to clean up wiper arrays on my controllers.

 

John Andersen


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#4 team burrito

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Posted 13 February 2020 - 12:25 PM

i would soak them in wd40 & clean it with toothbrush. as for the com plate, i would use 3m rotary bristle brush. it does a great job cleaning off corrosion without taking off the copper - use light pressure.


Russ Toy (not Troy)
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#5 team burrito

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Posted 13 February 2020 - 12:31 PM

Try an eraser or a fiberglas pen that is available at any electronic supply store. I use either to clean up wiper arrays on my controllers.

i wouldn't recommend the fiberglass pen. i've used it before & the bristles break off & gets in your finger tips, even if you're wearing gloves. the 3m bristle brush does a much better job without splinters.


Russ Toy (not Troy)
First Place Loser in the JK Products
International D3 Builders Competition

#6 Ted Bier

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Posted 13 February 2020 - 02:05 PM

Another simple question .

Is there a good brand of eraser people use for simple cleaning of armatures ?

I have bought some, they just don't work and I always end up using an eraser of a good brand pencil ! There has to be something that works better....I hope !



#7 ajd350

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Posted 13 February 2020 - 02:27 PM

Check with an art supply store. They might have pen erasers. they are abrasive enough to clean the comms without damage. I find typewriter erasers occasionally at yard sales. They work as well.


Al DeYoung

#8 Revtor

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Posted 16 February 2020 - 02:42 PM

https://www.flrprodu...-polishing-tool


I use one of these, t does a great job to smooth out and polish tjet comms.

Steve
~ Steve Maietta

#9 strummer

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Posted 17 February 2020 - 08:59 PM

I find it (perhaps) significant that no one has responded by saying these are too far gone to mess with: a testament to just how durable these little buggers are...  :good:

Mark in Oregon


Mark Mugnai

#10 Ted Bier

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Posted 18 February 2020 - 10:21 AM

So I experimented and won !

Back from the Dead !

This was the worst one !

Used Brass-O , then good ole' WD-40 .

And yes it runs !

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