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Re: TR-3A - Coil high tension wire. What's happening?

To: Andrew Mace <amace@unix2.nysed.gov>, John Cowan <jfcowan@earthlink.net>
Subject: Re: TR-3A - Coil high tension wire. What's happening?
From: Peter C <nosimport@mailbag.com>
Date: Tue, 12 Jan 1999 13:50:11 -0800
Cc: triumphs@autox.team.netov>
References: <3.0.5.32.19990112090325.016c55a0@earthlink.net>
There are also 2 lengths of wire nut. Shorty for dizzy caps long for the
coils. If you need dimendions, yell.
Peter C  
(as yet un-Triumphant)
------------

At 12:18 PM 1/12/99 -0500, Andrew Mace wrote:
>
>On Tue, 12 Jan 1999, John Cowan wrote:
>
>>      I unthinkingly pulled the high tension ignition wire out of the top of
>> the coil on my '60 TR-3A.  Then I unscrewed the plastic nut that surrounds
>> the wire. I big chunk of the threaded part was gone - perhaps a third of
>> its circumference, up to about half its length.  I expected to find the
>> broken piece sitting in the coil, but did not.  The plastic nut appears to
>> have been abraded away, but the threads in the coil seem ok.
>>      I theorize that the lead was not inserted far enough into the coil to
>> make good electrical contact and there was sparking going on there.  Anyone
>> encountered this problem before?
>>    In any case, this is a miserable design.  Anyone have a strategy for
>> preparing this connection properly?
>
>The HT lead should have on the end of it (after the threaded plastic nut
>is slipped over the wire) a small brass(?) disc. The wire strands from
>the HT lead pass through a hole in the center of that disc and then are
>splayed out radially. That helps hold that disc on as well as helping to
>make good contact. As I recall, the disc will not pass through the
>threaded nut, so if properly set up it all holds together pretty well.
>
>Of course, it doesn't work quite as well if you don't have metal core HT
>leads. ;-)
>
>--Andy
>
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>* Andrew Mace, President and                *
>*   10/Herald/Vitesse (Sports 6) Consultant *
>* Vintage Triumph Register <www.vtr.org>    *
>* amace@unix2.nysed.gov                     *
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