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Old Jan 14, 2013, 08:52 PM
Culper Junior
eastern pa
Joined Feb 2007
2,186 Posts
Help!
Torn servo lead

Hi all,
I was removing 2 servos from one model and reinstalling them in another when I noticed a small tear in the black wire insulation just beyond the rx plug. Looking at the tear through magnifying glasses and also a mag lens showed no wires were cut, just the insulation. I don't want to go through the hassle of cutting and re-soldering, is there anything (glue?) I could just smear over it to re-insulate it?
Long time ago I read not to use anything silicone based as it corrodes the metal strands. That true?
Also, not interested is spending $5 for a bottle of liquid plastic to use only a drop of.

Thanks for reading and any info/help.
Jim
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Old Jan 15, 2013, 04:22 AM
Registered User
Scottish Borders
Joined Mar 2006
570 Posts
Greetings Jim,

Individual crimp connectors can usually be removed from the plastic servo plug by raising or depressing a spring tag allowing a short piece of heatshrink to cover the cut.

Dave
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Old Jan 15, 2013, 07:23 AM
Culper Junior
eastern pa
Joined Feb 2007
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Thanks, I'll give that a try!
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Old Jan 15, 2013, 08:25 AM
Dave the Rave
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Why wouldn't a small piece of electrical tape do the job?
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Old Jan 15, 2013, 07:14 PM
Culper Junior
eastern pa
Joined Feb 2007
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I'm afraid that would still leave a tiny hole which would let dirt in.
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Old Jan 17, 2013, 01:15 AM
"MAYONNAISE"
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Le Treport, France
Joined Jun 2004
1,398 Posts
a tiny small droplet of nail lacquer ???

any kind of polyurethane varnish ( for furniture ...)

"Tropicoat" varnish for PCB ...

...

the list is long !

Alain
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Old Jan 17, 2013, 12:48 PM
Culper Junior
eastern pa
Joined Feb 2007
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Ace, I might have to go that route. I can't figure out how to (or what) to depress to release the wire.

Old eyes = poor technique
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Old Jan 17, 2013, 02:19 PM
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Liquid tape works great
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Old Jan 18, 2013, 07:39 AM
Dave the Rave
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Quote:
Originally Posted by aeronca52 View Post
Ace, I might have to go that route. I can't figure out how to (or what) to depress to release the wire.

Old eyes = poor technique
You don't depress anything, you lift it up. The brass terminals that are crimped onto the ends of the wires are inserted into the holes plastic housing, and there's a small flap that drops down into a slot in the terminal to prevent it from backing out. I use a #11 Xacto knife to pry it up enough to allow the terminal to slide back out. Don't lift it too high or it might break off, just enough to let the terminal slide out.
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Old Jan 18, 2013, 08:25 AM
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Here's a picture:
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Old Jan 18, 2013, 02:56 PM
Culper Junior
eastern pa
Joined Feb 2007
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Well, one picture is worth.......as they say. Thanks for that! I thought I had to lift or depress the metal contact to release the wire, not a piece of plastic.

Maybe there is hope for these eyes yet!
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Old Jan 19, 2013, 11:27 PM
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United States, ID
Joined Sep 2011
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LOL, seems like everyone missed the point here!

You don't need insulation at all on your ground (black) wires, so there's no point in worrying about it.
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Old Jan 20, 2013, 08:20 AM
Culper Junior
eastern pa
Joined Feb 2007
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Not in theory, no, but black (negative) wires have a tendency to corrode so it's prudent to protect them from the environment.

Besides, it looks neater.
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Old Jan 20, 2013, 11:53 AM
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Any type of glue like super glue would help
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Old Jan 21, 2013, 01:48 PM
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Quote:
Originally Posted by aeronca52 View Post
Not in theory, no, but black (negative) wires have a tendency to corrode so it's prudent to protect them from the environment.
Sure, but there's exposed metal all over in RC stuff. The connectors aren't sealed or waterproof designs, you can see the metal connectors plainly exposed to the environment on the clip side.

If you really want things looking top, my suggestion is to pull the black wire as described. Gently lift up on the catch, pull on the wire, and lift a little further only as much as needed, then bend the catch back down a bit to make sure it holds the connector when you put it back in.

Once the wire is out you can slip a little piece of heat shrink tube down the wire and shrink it on, then replace the wire.
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