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<p>The original pumps had a capacitor over the points which made
them dual polarity. At a later stage SU changed the capacitor for
a diode which made the pump polarity sensitive. If you remove the
diode and fit a transil over the points the pump becomes dual
polarity.</p>
<p>The very early pumps with the single points may not have had any
capacitor or diode fitted, which would lead to spark erosion of
the points. These were also dual polarity.<br>
</p>
<p>The later electronic/solid state versions are all polarity
sensitive.</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 7-3-2020 om 14:49 schreef David P:<br>
</div>
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<p>SU fuel pumps are generally polarity sensitive...</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 3/7/2020 1:18 AM, Kees Oudesluijs
wrote:<br>
</div>
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<p>In addition to the article:</p>
<p>-Change polarity to the radio if fitted. Some older radio's
have a polarity switch.</p>
<p>-Check if clock is polarity sensitive. Some older
Smiths/Jaeger clocks are dual polarity. Later ones are
polarity sentive.</p>
<p>-Change over the wires from the Amp gauge.</p>
<p><br>
</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 7-3-2020 om 04:48 schreef Max
Byers:<br>
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<p class="MsoNormal"><span style="color:#1F497D">See
attachment.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Steve Byers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">HBJ8L/36666<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">BJ8
Registry<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">AHCA
Delegate at Large<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Havelock,
NC USA<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Healeys [<a class="moz-txt-link-freetext"
href="mailto:healeys-bounces@autox.team.net"
moz-do-not-send="true">mailto:healeys-bounces@autox.team.net</a>]
<b>On Behalf Of </b>ahbn6--- via Healeys<br>
<b>Sent:</b> Friday, March 6, 2020 9:32 PM<br>
<b>To:</b> Healey List<br>
<b>Subject:</b> [Healeys] Polarity<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Arial
Black","sans-serif"">Is there any step
by instructions on how to change to negative ground?<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Arial
Black","sans-serif""><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Arial
Black","sans-serif"">John Sims<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Arial
Black","sans-serif""><a
href="http://www.healey6.com/"
moz-do-not-send="true">www.healey6.com</a><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
style="font-size:12.0pt;font-family:"Arial
Black","sans-serif"">Matawan, NJ<o:p></o:p></span></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
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