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Bob,
The settings are the same for all SU pumps as the coil housing with
points assembly is mechanically the same on all SU-pumps.
top blade to pedestal at the very front of the blade: 0,9mm/0,035
coil body to lip on lower points assembly: 2,3mm/0,090", this used to be
1,9mm in the early days with a slightly different points design (NLA),
but I set them all to 2,3mm using the later points
Also important is the adjustment of the diaphragm:
Remove the 10 guiding brass rings, five 8-shaped plastic parts or a
U-shaped plastic casting between the steel centre of the diaphragm and
coil housing.Screw in the diaphragm slowly while continually moving it
in and out firmly, holding the pump horizontal, until the points just do
not throw over any more, turn the diaphragm back to line up with the
nearest hole and then turn back another 4 holes. Refit the guiding brass
rings/8-shaped plastic parts/ U-shaped plastic casting. Be careful that
these are seated properly. If not they will get damaged and the
diaphragm will be destroyed when fitting the pump body and coil housing
together.
Adjust the points as previously described.
Fit a transil between the small terminal screw of the points blade and
one of the 2 larger pedestal screws.
Kees Oudesluijs
Op 5-12-2018 om 04:55 schreef Bob Spidell:
>
> David,
>
> Are the factory settings per SU the same as those in the shop manual
> (Bentley, in my case)?
>
> Bob
>
>
> On 11/29/2018 8:18 AM, David Nock wrote:
>> We install and sell probably about 50Â to 75 SU fuel pump a year with
>> almost 0 returns. The only time when we had an issue with the SU
>> pumps is when they first came out with the Positive Ground pumps.
>> The reason for this is they went backwards in time about 50 years.
>> Originally the pumps only had a set of points and no condensor. Then
>> they installed a condensor in the early 50s to solve the pitting
>> points and sticking problems they were having. These pumps were used
>> thru the early 80â??s with very few issues other than failures due to
>> age. Sometime in the late 80â??s or early 90â??s there was a demand for
>> originallity for a Positive Ground pump at the time the had changed
>> from a condensor to a diode in across the points. So the answer to a
>> Positive Ground pump was to remove the diode. This returned the pump
>> the original design and they started having pump failures in the
>> Positive ground pumps.
>> Then somewhere in the late 90â??s they started installing a non
>> polarity concious diode in all the pumps. Thus solving the problem
>> with pump failure due to the points.
>> The one issue that we did find with the pumps in the late 90â??s up
>> until about 2005 was that the diaphgrams / points adjustments were
>> incorrect. So we would always pull all of our pumps apart and re
>> adjust the points to the factory settings as per SU.
>> 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.britishsportscarhall.org
>>
>
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<p>Bob,<br>
</p>
<p><br>
</p>
<p>The settings are the same for all SU pumps as the coil housing
with points assembly is mechanically the same on all SU-pumps.<br>
</p>
<p>top blade to pedestal at the very front of the blade: 0,9mm/0,035</p>
<p>coil body to lip on lower points assembly: 2,3mm/0,090", this
used to be 1,9mm in the early days with a slightly different
points design (NLA), but I set them all to 2,3mm using the later
points</p>
<p>Also important is the adjustment of the diaphragm: <br>
</p>
<p> Remove the 10 guiding brass rings, five 8-shaped plastic parts
or a U-shaped plastic casting between the steel centre of the
diaphragm and coil housing.Screw in the diaphragm slowly while
continually moving it in and out firmly, holding the pump
horizontal, until the points just do not throw over any more, turn
the diaphragm back to line up with the nearest hole and then turn
back another 4 holes. Refit the guiding brass rings/8-shaped
plastic parts/ U-shaped plastic casting. Be careful that these are
seated properly. If not they will get damaged and the diaphragm
will be destroyed when fitting the pump body and coil housing
together.<br>
Adjust the points as previously described. <br>
</p>
<p>Fit a transil between the small terminal screw of the points
blade and one of the 2 larger pedestal screws.<br>
</p>
<p><br>
</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Op 5-12-2018 om 04:55 schreef Bob
Spidell:<br>
</div>
<blockquote type="cite"
cite="mid:2af6837f-5dd5-22f6-0bb8-88cc5ad6b689@comcast.net">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p>David,</p>
<p>Are the factory settings per SU the same as those in the shop
manual (Bentley, in my case)?</p>
<p>Bob</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 11/29/2018 8:18 AM, David Nock
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1F4D7A337AA24FF9A48B4B4A34F40C3C@DavidNockHP">
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<div dir="ltr">
<div style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century';
COLOR:
 #000000">
<div>We install and sell probably about 50Â to 75 SU fuel
pump a year with almost 0 returns. The only time when we
had an issue with the SU pumps is when they first came out
with the Positive Ground pumps.</div>
<div>Â </div>
<div>The reason for this is they went backwards in time
about 50 years.</div>
<div>Â </div>
<div>Originally the pumps only had a set of points and no
condensor. Then they installed a condensor in the early
50s to solve the pitting points and sticking problems they
were having. These pumps were used thru the early 80â??s
with very few issues other than failures due to age.
Sometime in the late 80â??s or early 90â??s there was a demand
for originallity for a Positive Ground pump at the time
the had changed from a condensor to a diode in across the
points. So the answer to a Positive Ground pump was to
remove the diode. This returned the pump the original
design and they started having pump failures in the
Positive ground pumps.</div>
<div>Â </div>
<div>Then somewhere in the late 90â??s they started installing
a non polarity concious diode in all the pumps. Thus
solving the problem with pump failure due to the points. </div>
<div>Â </div>
<div>The one issue that we did find with the pumps in the
late 90â??s up until about 2005 was that the diaphgrams /
points adjustments were incorrect. So we would always pull
all of our pumps apart and re adjust the points to the
factory settings as per SU.</div>
<div>Â </div>
<div>Â </div>
<div>Â </div>
<div style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century';
COLOR:
 #000000">David Nock<br>
<a class="moz-txt-link-abbreviated"
href="mailto:healeydoc@sbcglobal.net";
moz-do-not-send="true">healeydoc@sbcglobal.net</a><br>
209 948 8767<br>
<a class="moz-txt-link-abbreviated"
href="http://www.britishcarspecialists.com";
moz-do-not-send="true">www.britishcarspecialists.com</a><br>
<br>
Help us have our Founder Norman Nock inducteed into the <br>
British Sportscar Hall of Fame, You can vote for your
favorites <br>
by visiting the site at.<br>
<a class="moz-txt-link-abbreviated"
href="http://www.britishsportscarhall.org";
moz-do-not-send="true">www.britishsportscarhall.org</a><br>
</div>
<div style="FONT-SIZE: small; TEXT-DECORATION: none;

FONT-FAMILY: "Calibri"; FONT-WEIGHT:
normal;
 COLOR: #000000; FONT-STYLE: normal; DISPLAY:
inline">
<div style="FONT: 10pt tahoma">
<div>Â </div>
<br>
</div>
</div>
</div>
</div>
</blockquote>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre"
wrap="">_______________________________________________
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