<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix"><br>
The later AUF301 with the Bakelite top (AZX1308 from Burlen-SU
with a slightly different plastic top) do not have a bypass. Not
needed as the max. pressure is only 3,7 psi. A tiny leakage is
through the plastic valves or in the rest of the fuel system after
the pump, e.g. float valves. Damage to parts in the pump is simply
not possible with such a low max. pressure. <br>
I have rebuild well over a hundred SU-pumps by now, most AUF301,
and have at least 20 of those on the shelf. The same pump is also
used in many XK Jaguars, Triumph Stag and Jensen-Healey.<br>
<br>
Kees Oudesluijs<br>
<br>
Op 18-2-2018 om 18:30 schreef Bob Spidell:<br>
</div>
<blockquote type="cite"
cite="mid:1827268766.62443.1518975044879@connect.xfinity.com">
<meta http-equiv="Context-Type" content="text/html; charset=UTF-8">
<p>I went through an early (BN2) pump for a different
issue--erratic pumping--and noticed what appeared to be a small
bypass port between the brass valves. I surmised (guessed) that
the passageway may be there to allow the pump to 'bleed down'
when the engine isn't running. Not sure why, but one reason
could be that it could be detrimental to the diaphragm to be in
the 'cocked and loaded' position for too long. Can't say if the
later pumps have something similar but, as Kees says, the
flapper valves probably leak enough to prevent this.<br>
</p>
<p><br>
</p>
<p>Bob<br>
</p>
<p class="io-ox-signature">--------------------------------<br>
Bob Spidell - San Jose, CA</p>
<blockquote type="cite">On February 18, 2018 at 10:50 AM Oudesluys
<a class="moz-txt-link-rfc2396E" href="mailto:coudesluijs@chello.nl"><coudesluijs@chello.nl></a> wrote:<br>
<br>
<div class="ox-a45cdb1130-moz-cite-prefix"><br>
It should pump/click every 15s or more. There is always a
slight seepage through the plastic valves. They are never 100%
leak free. If you hear it pumping more often the chance is
that the seat faces of the valves are dirty or corroded. This
can usually be remedied by carefully removing the valve
assemblies, prying out the plastic valves very prudently,
clean them and clean the faces of the bodies. If very corroded
the valve assemblies can be renewed. When fitting them back in
the pump body use new rubber seals (flat rubber rings). If
they are not available you can usually get away with fitting
suitable O-rings.<br>
If the pump is out clean the contact points with a strip of
2000 flower paper. <br>
When the points are severely worn, dismantle and rebuild the
pump and keep the 3-layer membrane if possible as the new
single layer membranes are of a lesser quality. Be very
careful not to damage the thin kevlar layer when removing the
pump body, separate the layers and rub some talcum powder
between the layers very sparingly to create a supple membrane
assembly.<br>
If you follow the SU instruction to the letter the job of
rebuilding is a piece of cake and should not take more than
half an hour. Parts are available at the SU dealers. (Google)<br>
Kees Oudesluijs<br>
<br>
<br>
<br>
Op 18-2-2018 om 8:55 schreef Patrick & Caroline Quinn:<br>
</div>
<blockquote type="cite">
<div class="ox-a45cdb1130-WordSection1">
<p class="ox-a45cdb1130-MsoNormal">Greetings</p>
<p class="ox-a45cdb1130-MsoNormal"> </p>
<p class="ox-a45cdb1130-MsoNormal">Well the cavalry arrived
and the engine in the BN3 is now running for the first
time in nearly seven years.</p>
<p class="ox-a45cdb1130-MsoNormal"> </p>
<p class="ox-a45cdb1130-MsoNormal">If you recall that
despite going by the book the rotor button looked to be
120 degrees out.</p>
<p class="ox-a45cdb1130-MsoNormal"> </p>
<p class="ox-a45cdb1130-MsoNormal">The solution? Move the
geared camshaft/distributor drive about four teeth, put it
all back together, press the solenoid and away it went.
Good oil pressure and lots of gunk out the exhaust and on
to my friend’s E-type. Very pleased!</p>
<p class="ox-a45cdb1130-MsoNormal"> </p>
<p class="ox-a45cdb1130-MsoNormal">Now the next question is
why does a SU fuel pump keep pumping occasionally with the
ignition on even when there are no leaks and the float
bowl levels are correct.</p>
<p class="ox-a45cdb1130-MsoNormal"> </p>
<p class="ox-a45cdb1130-MsoNormal">Hoo Roo</p>
<p class="ox-a45cdb1130-MsoNormal"> </p>
<p class="ox-a45cdb1130-MsoNormal">Patrick Quinn</p>
<p class="ox-a45cdb1130-MsoNormal">Blue Mountains, Australia</p>
<p class="ox-a45cdb1130-MsoNormal"> </p>
</div>
</blockquote>
</blockquote>
<p class="default-style"><br>
</p>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Support Team.Net <a class="moz-txt-link-freetext" href="http://www.team.net/donate.html">http://www.team.net/donate.html</a>
Suggested annual donation $12.75
Archive: <a class="moz-txt-link-freetext" href="http://www.team.net/archive">http://www.team.net/archive</a>
Forums: <a class="moz-txt-link-freetext" href="http://www.team.net/forums">http://www.team.net/forums</a>
<a class="moz-txt-link-abbreviated" href="mailto:Healeys@autox.team.net">Healeys@autox.team.net</a>
<a class="moz-txt-link-freetext" href="http://autox.team.net/mailman/listinfo/healeys">http://autox.team.net/mailman/listinfo/healeys</a>
Unsubscribe/Manage: <a class="moz-txt-link-freetext" href="http://autox.team.net/mailman/options/healeys/coudesluijs@chello.nl">http://autox.team.net/mailman/options/healeys/coudesluijs@chello.nl</a>
</pre>
</blockquote>
<p><br>
</p>
</body>
</html>