Tom, if that sender is like others I've seen of the same design, it contains
some kind of alcohol, not mercury. It lools like a pipe thread so some type
of sealer is called for - Teflon tape would work, but the paste is better
because you don't want little pieces of tape ending up in your radiator
core.
Can't help you with the electric one. It seems to me an ohm meter would be
useful to determine if the sender is working, but all it would tell you on
the gauge is if you have continuity, but there may be a test I don't know
about.
Bob
----- Original Message -----
From: "T Cooper" <tntcoop@earthlink.net>
To: "Oletrucks" <oletrucks@autox.team.net>
Sent: Wednesday, July 02, 2008 5:12 PM
Subject: [oletrucks] temp gauge
>I have been busy at work and havnt had much time for my truck. Things have
> settled down a little so I am starting back, so here goes.
> I have to temp gauges for a 1955-59 truck. One of them is for electric and
> the other has one line running to it. I heard the single line was mercury
> and the other gauge was electric. I put the end of the mercury gauge in
> hot
> water so I know it works. It looks like it may leak where the fitting goes
> into the head though. The sending unit threads have 4 flat sides on them.
> It
> looks like it is made that way,
> http://www.coopscorner.com/55truck/55misc/startwiring.htm, but I don't
> see
> how it will not leak. Do I need lots of Teflon tape on the fitting?
>
> Is there anyway to check the electric gauge without having power connected
> to it? Someone told me I could check the ohms, but he didn't know what
> they
> were suppose to be.
> Anyway, I appreciate the help.
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