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Re: [Healeys] Master Switch

To: healeys@autox.team.net
Subject: Re: [Healeys] Master Switch
From: Michael Salter <michaelsalter@gmail.com>
Date: Thu, 26 Mar 2020 09:35:54 +1300
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <1713762296.965673.1585009049044.ref@mail.yahoo.com> <1713762296.965673.1585009049044@mail.yahoo.com> <003201d60261$502566c0$f0703440$@sbcglobal.net> <3C978848B6884B7B8B6B7744B6B67DA9@DavidNockHP> <001101d602df$fd87db30$f8979190$@sbcglobal.net>
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My experience with the original Lucas Master switches has been a little
different.
Many years ago, after having a newly installed NOS switch fail on my own
car, I  discovered that it had failed because the ground cable running from
the switch to the frame was not properly installed.
The full starter current must pass through the switch then through the
cable to ground. When there is resistance in that cable current passes
through THE SPRING to then ground through the body of the switch and the
switch mounting bracket.
This high current rapidly overheats the spring and it looses tension
ruining the switch.
I have disassembled several of these switches to stretch the spring as
suggested but often found that the brass of the spring had been totally
annealed as a result of being overheated because of the current that had
passed through them.
For my own car (and several others since)  I made a new spring from copper
coated steel welding wire wich lasted until I sold the car many years
later.

M

On Thu, Mar 26, 2020, 9:00 AM John Spaur, <jmsdarch@sbcglobal.net> wrote:

> In my experience with the switches they overheat and the spring collapses=
.
>
>
>
> Good to know you have the rivets.
>
>
>
> John
>
>
>
> *From:* David Nock [mailto:healeydoc@gmail.com]
> *Sent:* Wednesday, March 25, 2020 7:57 AM
> *To:* John Spaur <jmsdarch@sbcglobal.net>; 'Healeys' <
> healeys@autox.team.net>
> *Subject:* Re: [Healeys] Master Switch
>
>
>
> The number one fault with both the original and the new switch is the
> spring inside looses its tension and you then loose the ground connection=
.
> We have sourced the correct rivets to restore your original battery switc=
h.
>
>
>
> I have also had to take apart the new switches to make them work
> correctly. Simply drill out the rivets. Stretch out the new spring and
> install new rivets.
>
>
>
>
>
> David Nock
> healeydoc@sbcglobal.net
> 209 948 8767
> www.britishcarspecialists.com
>
> Help us have our Founder Norman Nock inducteed into the
> British Sportscar Hall of Fame, You can vote for your favorites
> by visiting the site at.
> www.britishsportscarhalloffame.org
>
>
>
> *From:* John Spaur
>
> *Sent:* Tuesday, March 24, 2020 9:53 PM
>
> *To:* 'Healeys'
>
> *Subject:* Re: [Healeys] Master Switch
>
>
>
> I have tried to post this to the list several times but it keeps bouncing=
.
>
>
>
> The internal part in the reproduction switches is plastic, not Bakelite.
> If your engine is hard to start and you crank it too long the plastic par=
t
> melts and the switch is toast. I rebuilt one recently with the proper
> Bakelite part. However, they are not always interchangeable with the newe=
r
> metal case because the metal case is slightly smaller.
>
>
>
> John
>
> =E2=80=9962 BT7
>
> San Jose, CA
> ------------------------------
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
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> Suggested annual donation  $12.75
>
> Archive: http://www.team.net/pipermail/healeys
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>
>

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<div dir=3D"auto">My experience with the original Lucas Master switches has=
 been a little different.=C2=A0<br><div dir=3D"auto"><span style=3D"font-fa=
mily:sans-serif">Many</span><span style=3D"font-family:sans-serif">=C2=A0ye=
ars ago, after</span>=C2=A0having a newly installed NOS switch fail on my o=
wn car,=C2=A0I=C2=A0 discovered that it had failed because the ground cable=
 running from the switch to the frame was not properly=C2=A0installed.=C2=
=A0</div><div dir=3D"auto">The full starter current must pass through the s=
witch then through the cable to ground. When there is resistance in that ca=
ble current passes through THE SPRING to then ground through the body of th=
e switch and the switch mounting bracket.</div><div dir=3D"auto">This high =
current rapidly overheats the spring and it looses tension ruining the swit=
ch.</div><div dir=3D"auto">I have disassembled several of these switches to=
 stretch the spring as suggested but often found that the brass of the spri=
ng had been totally annealed as a result of being overheated because of the=
 current that had passed through them.</div><div dir=3D"auto">For my own ca=
r (and several others since)=C2=A0 I made a new spring from copper coated s=
teel welding wire wich lasted until I sold the car many years later.=C2=A0<=
/div><div dir=3D"auto"><br></div><div dir=3D"auto">M</div></div><br><div cl=
ass=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Mar 26, 2=
020, 9:00 AM John Spaur, &lt;<a href=3D"mailto:jmsdarch@sbcglobal.net";>jmsd=
arch@sbcglobal.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote=
" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><=
div lang=3D"EN-US" link=3D"blue" vlink=3D"purple"><div class=3D"m_-31512669=
76226350448WordSection1"><p class=3D"MsoNormal"><span style=3D"font-size:11=
.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d">In my experi=
ence with the switches they overheat and the spring collapses.<u></u><u></u=
></span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-fam=
ily:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></spa=
n></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">Good to know you have the rivet=
s.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:=
11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=
=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt=
;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d">John<u></u><u></=
u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-fa=
mily:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u>=C2=A0<u></u></sp=
an></p><div><div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;paddin=
g:3.0pt 0in 0in 0in"><p class=3D"MsoNormal"><b><span style=3D"font-size:11.=
0pt;font-family:&quot;Calibri&quot;,sans-serif">From:</span></b><span style=
=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"> David Noc=
k [mailto:<a href=3D"mailto:healeydoc@gmail.com"; target=3D"_blank" rel=3D"n=
oreferrer">healeydoc@gmail.com</a>] <br><b>Sent:</b> Wednesday, March 25, 2=
020 7:57 AM<br><b>To:</b> John Spaur &lt;<a href=3D"mailto:jmsdarch@sbcglob=
al.net" target=3D"_blank" rel=3D"noreferrer">jmsdarch@sbcglobal.net</a>&gt;=
; &#39;Healeys&#39; &lt;<a href=3D"mailto:healeys@autox.team.net"; target=3D=
"_blank" rel=3D"noreferrer">healeys@autox.team.net</a>&gt;<br><b>Subject:</=
b> Re: [Healeys] Master Switch<u></u><u></u></span></p></div></div><p class=
=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><div><div><p class=3D"MsoNormal=
"><span style=3D"font-family:&quot;Century&quot;,serif;color:black">The num=
ber one fault with both the original and the new switch is the spring insid=
e looses its tension and you then loose the ground connection. We have sour=
ced the correct rivets to restore your original battery switch.<u></u><u></=
u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-family:&=
quot;Century&quot;,serif;color:black">=C2=A0<u></u><u></u></span></p></div>=
<div><p class=3D"MsoNormal"><span style=3D"font-family:&quot;Century&quot;,=
serif;color:black">I have also had to take apart the new switches to make t=
hem work correctly. Simply drill out the rivets. Stretch out the new spring=
 and install new rivets.<u></u><u></u></span></p></div><div><p class=3D"Mso=
Normal"><span style=3D"font-family:&quot;Century&quot;,serif;color:black">=
=C2=A0<u></u><u></u></span></p></div><div><p class=3D"MsoNormal"><span styl=
e=3D"font-family:&quot;Century&quot;,serif;color:black">=C2=A0<u></u><u></u=
></span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-family:&q=
uot;Century&quot;,serif;color:black">David Nock<br><a href=3D"mailto:healey=
doc@sbcglobal.net" target=3D"_blank" rel=3D"noreferrer">healeydoc@sbcglobal=
.net</a><br>209 948 8767<br><a href=3D"http://www.britishcarspecialists.com=
" target=3D"_blank" rel=3D"noreferrer">www.britishcarspecialists.com</a><br=
><br>Help us have our Founder Norman Nock inducteed into the <br>British Sp=
ortscar Hall of Fame, You can vote for your favorites <br>by visiting the s=
ite at.<br><a href=3D"http://www.britishsportscarhalloffame.org"; target=3D"=
_blank" rel=3D"noreferrer">www.britishsportscarhalloffame.org</a><u></u><u>=
</u></span></p></div><div><div><div><p class=3D"MsoNormal"><span style=3D"f=
ont-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black">=C2=
=A0<u></u><u></u></span></p></div><div><div><p class=3D"MsoNormal" style=3D=
"background:whitesmoke"><b><span style=3D"font-size:10.0pt;font-family:&quo=
t;Tahoma&quot;,sans-serif;color:black">From:</span></b><span style=3D"font-=
size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black"> John Sp=
aur <u></u><u></u></span></p></div><div><p class=3D"MsoNormal" style=3D"bac=
kground:whitesmoke"><b><span style=3D"font-size:10.0pt;font-family:&quot;Ta=
homa&quot;,sans-serif;color:black">Sent:</span></b><span style=3D"font-size=
:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black"> Tuesday, Ma=
rch 24, 2020 9:53 PM<u></u><u></u></span></p></div><div><p class=3D"MsoNorm=
al" style=3D"background:whitesmoke"><b><span style=3D"font-size:10.0pt;font=
-family:&quot;Tahoma&quot;,sans-serif;color:black">To:</span></b><span styl=
e=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color:black=
"> &#39;Healeys&#39; <u></u><u></u></span></p></div><div><p class=3D"MsoNor=
mal" style=3D"background:whitesmoke"><b><span style=3D"font-size:10.0pt;fon=
t-family:&quot;Tahoma&quot;,sans-serif;color:black">Subject:</span></b><spa=
n style=3D"font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif;color=
:black"> Re: [Healeys] Master Switch<u></u><u></u></span></p></div></div></=
div><div><p class=3D"MsoNormal"><span style=3D"font-family:&quot;Calibri&qu=
ot;,sans-serif;color:black">=C2=A0<u></u><u></u></span></p></div></div><div=
><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif;color:#1f497d">I have tried to post this to the lis=
t several times but it keeps bouncing.<u></u><u></u></span></p><p class=3D"=
MsoNormal"><span style=3D"color:black">=C2=A0</span><span style=3D"font-siz=
e:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u><=
u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;fon=
t-family:&quot;Calibri&quot;,sans-serif;color:#1f497d">The internal part in=
 the reproduction switches is plastic, not Bakelite. If your engine is hard=
 to start and you crank it too long the plastic part melts and the switch i=
s toast. I rebuilt one recently with the proper Bakelite part. However, the=
y are not always interchangeable with the newer metal case because the meta=
l case is slightly smaller.<u></u><u></u></span></p><p class=3D"MsoNormal">=
<span style=3D"color:black">=C2=A0</span><span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,sans-serif;color:#1f497d"><u></u><u></u></spa=
n></p><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif;color:#1f497d">John<u></u><u></u></span></p><p=
 class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Cali=
bri&quot;,sans-serif;color:#1f497d">=E2=80=9962 BT7<u></u><u></u></span></p=
><p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,sans-serif;color:#1f497d">San Jose, CA<u></u><u></u></span></p=
><div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><spa=
n style=3D"font-family:&quot;Calibri&quot;,sans-serif;color:black"><hr size=
=3D"2" width=3D"100%" align=3D"center"></span></div><p class=3D"MsoNormal" =
style=3D"margin-bottom:12.0pt"><span style=3D"font-family:&quot;Calibri&quo=
t;,sans-serif;color:black">_______________________________________________<=
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</blockquote></div>

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