--===============3144460256847824763==
--0000000000002adb6d057bc61813
Content-Transfer-Encoding: quoted-printable
This discussion about fuel pumps has revived something from the old grey
matter ...
To those mentioning repeated failures one problem that will cause premature
failure is restrictions in the supply to the pump.
The way these pumps work is that the spring in the pump provides the
pressure. As the pressure on the output side of the pump decreases the
diaphragm moves down to a point where the points close, that energizes the
coil to pull the armature up against the spring pressure to the point where
the points "flip" and open to stop the current flow through the coil.
HOWEVER if there is a restriction in the fuel line feeding the pump the low
pressure at the pump inlet can create a partial vacuum which will prevent
the armature from rising fully and thus the points from "flipping" .
When this happens the coil remains energized and "cooks" in a short time
thus ruining the pump.
I discovered this while trying to resolve a delivery problem in a car that
had had the tank "sloshed". The sloshing compound had coated the gauze
filter inside the tank severly restricting the flow.
The test was to put an analogue ammeter on the pump electrical supply which
showed the prolonged current flow to the pump.
M
On Wed, Nov 28, 2018, 9:45 PM Kees Oudesluijs <coudesluijs@chello.nl wrote:
> Quite so. The only thing I can come up with is the car is hardly being
> used and being stored in dampish non ventilated conditions, thus corrodin=
g
> the points. As I said before I have had SU fuel pumps in from more than 5=
0
> years old which were absolutely perfect except for the points corroded
> because the car was not used enough or worn because of not being adjusted
> properly.
>
> If used regularly and kept dry internally they last forever.
>
> Another thing: If you have had to tap the pump to get it going,
> replace/polish and adjust the points ASAP. Do not wait until you have to
> repeat the tapping.
>
> When fitting a new SU-pump you best remove the cap to inspect and if
> needed clean the points first with very fine polishing paper, I use at
> least 1000. It is even not uncommon that brand new pumps that have been o=
n
> the shelf for a while, either at home, in the garage or at the suppliers =
do
> not work because the points are dirty/corroded and have to be attended to
> first. I have bought many pumps that were sold as "defective, for spares =
or
> repair" for a song, that did not work and appeared to be in fact NOS.
> Cleaning and polishing the points was all that was needed for these. If y=
ou
> have a new/rebuild spare pump in store , remove the cap and insert a bit =
of
> acid free paper in between the points, this will stop electrolytic
> corrosion.
>
> In the late 70=C2=B4s I was collecting quite a lot of Jensen parts and g=
ot
> presented a new pump by Jensen Parts & Service that was said to be
> defective but only needed some small attention. My old pump kept working
> (more than 160000mls) so the new pump was never needed. About 5 or 6 year=
s
> ago I came across that pump and decided to have a look inside. It was of
> course mint but there were real cauliflowers around the points. Just
> polished them, fitted a transil (as I do with all my rebuilds) and is now
> in my present car.
>
>
> Kees Oudesluijs
>
>
>
> Op 28-11-2018 om 18:50 schreef healeydoc@gmail.com:
>
> I do not understand the problem with the SU pump that everyone feels that
> they have to re invent the wheel. I have using the standard SU pump with
> points in my Healey for almost 75000 miles and never had a failure.
>
> We also have been installing the standard SU points pump here at the shop
> on every car we do for over 40 years
> Everything from Healey=E2=80=99s, MG=E2=80=99s and Jaguar=E2=80=99s and h=
ad very few failures.
>
>
>
> 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
>
> *From:* Tom <ah3000me@gmail.com>
> *Sent:* Wednesday, November 28, 2018 6:00 AM
> *To:* healeys@autox.team.net
> *Subject:* Re: [Healeys] Fuel pumps (AGAIN!)
>
> I found the voltage regulator was misadjusted when i got my car. At 17V,
> a new pump quit working in less than a year. At 14V, the replacement is =
10
> years old and happily ticking away.
>
> Tom
>
> On Tue, Nov 27, 2018, 9:16 PM Frank Magnusson <fmags@cox.net wrote:
>
>> Hi Bob,
>>
>>
>>
>> I=E2=80=99m also not sure why you=E2=80=99re having problems with pumps.=
Maybe something
>> common between all of them; the vent, the ground, the venting of the fue=
l
>> system, etc.
>>
>>
>>
>> I replaced my original pump in the late 80=E2=80=99s with a stock SU pum=
p with
>> points and it=E2=80=99s been on the car ever since; no problems except l=
ast year
>> when it didn=E2=80=99t want to start, but a rap with a rubber mallet and=
it=E2=80=99s been
>> working ever since.
>>
>>
>>
>> Try Healey Surgeons for a replacement pump. Their parts are 100% correc=
t
>> and I=E2=80=99ve never had a problem with anything from them in almost 3=
0 years.
>>
>>
>>
>> Best of luck,
>>
>> Frank
>>
>> =E2=80=9965 BJ8
>>
>>
>> <https://www.avast.com/sig-email?utm_medium=3Demail&utm_source=3Dlink&ut=
m_campaign=3Dsig-email&utm_content=3Demailclient&utm_term=3Dicon> Virus-fre=
e.
>> www.avast.com
>> <https://www.avast.com/sig-email?utm_medium=3Demail&utm_source=3Dlink&ut=
m_campaign=3Dsig-email&utm_content=3Demailclient&utm_term=3Dlink>
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>> Support Team.Net http://www.team.net/donate.html
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>>
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>>
>> ------------------------------
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--0000000000002adb6d057bc61813
Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto">This discussion about fuel pumps has revived something fr=
om the old grey matter ...<div dir=3D"auto">To those mentioning repeated fa=
ilures one problem that will cause premature failure is restrictions in the=
supply to the pump.</div><div dir=3D"auto">The way these pumps work is tha=
t the spring in the pump provides the pressure. As the pressure on the outp=
ut side of the pump decreases the diaphragm moves down to a point where the=
points close, that energizes the coil to pull the armature up against the =
spring pressure to the point where the points "flip" and open to =
stop the current flow through the coil.</div><div dir=3D"auto">HOWEVER if t=
here is a restriction in the fuel line feeding the pump the low pressure at=
the pump inlet can create a partial vacuum which will prevent the armature=
from rising fully and thus the points from "flipping" .</div><di=
v dir=3D"auto">When this happens the coil remains energized and "cooks=
" in a short time thus ruining the pump.</div><div dir=3D"auto">I disc=
overed this while trying to resolve a delivery problem in a car that had ha=
d the tank "sloshed". The sloshing compound had coated the gauze =
filter=C2=A0 inside the tank severly restricting the flow.=C2=A0</div><div =
dir=3D"auto">The test was to put an analogue ammeter on the pump electrical=
supply which showed the prolonged current flow to the pump.</div><div dir=
=3D"auto"><br></div><div dir=3D"auto">M</div></div><br><div class=3D"gmail_=
quote"><div dir=3D"ltr">On Wed, Nov 28, 2018, 9:45 PM Kees Oudesluijs <<=
a href=3D"mailto:coudesluijs@chello.nl";>coudesluijs@chello.nl</a> wrote:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex">
=20
=20
=20
<div text=3D"#000000" bgcolor=3D"#FFFFFF">
<p>Quite so. The only thing I can come up with is the car is hardly
being used and being stored in dampish non ventilated conditions,
thus corroding the points. As I said before I have had SU fuel
pumps in from more than 50 years old which were absolutely perfect
except for the points corroded because the car was not used enough
or worn because of not being adjusted properly. <br>
</p>
<p>If used regularly and kept dry internally they last forever.<br>
</p>
<p>Another thing: If you have had to tap the pump to get it going,
replace/polish and adjust the points ASAP. Do not wait until you
have to repeat the tapping.</p>
<p>When fitting a new SU-pump you best remove the cap to inspect and
if needed clean the points first with very fine polishing paper, I
use at least 1000. It is even not uncommon that brand new pumps
that have been on the shelf for a while, either at home, in the
garage or at the suppliers do not work because the points are
dirty/corroded and have to be attended to first. I have bought
many pumps that were sold as "defective, for spares or repair&qu=
ot;=C2=A0
for a song, that did not work and appeared to be in fact NOS.
Cleaning and polishing the points was all that was needed for
these. If you have a new/rebuild spare pump in store , remove the
cap and insert a bit of acid free paper in between the points,
this will stop electrolytic corrosion.</p>
<p>In the late 70=C2=B4s I was collecting=C2=A0 quite a lot of Jensen p=
arts
and got presented a new pump by Jensen Parts & Service that
was said to be defective but only needed some small attention. My
old pump kept working (more than 160000mls) so the new pump was
never needed. About 5 or 6 years ago I came across that pump and
decided to have a look inside. It was of course mint but there
were real cauliflowers around the points. Just polished them,
fitted a transil (as I do with all my rebuilds) and is now in my
present car.<br>
</p>
<p><br>
</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div class=3D"m_-859660861838157moz-cite-prefix">Op 28-11-2018 om 18:50=
schreef
<a class=3D"m_-859660861838157moz-txt-link-abbreviated" href=3D"mailt=
o:healeydoc@gmail.com" target=3D"_blank" rel=3D"noreferrer">healeydoc@gmail=
.com</a>:<br>
</div>
<blockquote type=3D"cite">
=20
<div dir=3D"ltr">
<div style=3D"FONT-SIZE:12pt;FONT-FAMILY:'Century';COLOR:#0=
00000">
<div>I do not understand the problem with the SU pump that
everyone feels that they have to re invent the wheel. I have
using the standard SU pump with points in my Healey for
almost 75000 miles and never had a failure. </div>
<div>=C2=A0</div>
<div>We also have been installing the standard SU points pump
here at the shop on every car we do for over 40 years </div>
<div>Everything from Healey=E2=80=99s, MG=E2=80=99s and Jaguar=E2=
=80=99s and had very
few failures.</div>
<div>=C2=A0</div>
<div>=C2=A0</div>
<div>=C2=A0</div>
<div style=3D"FONT-SIZE:12pt;FONT-FAMILY:'Century';COLOR:=
#000000">David Nock<br>
<a class=3D"m_-859660861838157moz-txt-link-abbreviated" href=3D=
"mailto:healeydoc@sbcglobal.net"; target=3D"_blank" rel=3D"noreferrer">heale=
ydoc@sbcglobal.net</a><br>
209 948 8767<br>
<a class=3D"m_-859660861838157moz-txt-link-abbreviated" 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 Sportscar Hall of Fame, You can vote for your
favorites <br>
by visiting the site at.<br>
<a class=3D"m_-859660861838157moz-txt-link-abbreviated" href=3D=
"http://www.britishsportscarhall.org"; target=3D"_blank" rel=3D"noreferrer">=
www.britishsportscarhall.org</a><br>
</div>
<div style=3D"FONT-SIZE:small;TEXT-DECORATION:none;FONT-FAMILY:&q=
uot;Calibri";FONT-WEIGHT:normal;COLOR:#000000;FONT-STYLE:normal;DISPLA=
Y:inline">
<div style=3D"FONT:10pt tahoma">
<div>=C2=A0</div>
<div style=3D"BACKGROUND:#f5f5f5">
<div><b>From:</b> <a title=3D"ah3000me@gmail.com" href=3D"m=
ailto:ah3000me@gmail.com" target=3D"_blank" rel=3D"noreferrer">Tom</a> </di=
v>
<div><b>Sent:</b> Wednesday, November 28, 2018 6:00 AM</div=
>
<div><b>To:</b> <a title=3D"healeys@autox.team.net" href=3D=
"mailto:healeys@autox.team.net"; target=3D"_blank" rel=3D"noreferrer">healey=
s@autox.team.net</a> </div>
<div><b>Subject:</b> Re: [Healeys] Fuel pumps (AGAIN!)</div=
>
</div>
</div>
<div>=C2=A0</div>
</div>
<div style=3D"FONT-SIZE:small;TEXT-DECORATION:none;FONT-FAMILY:&q=
uot;Calibri";FONT-WEIGHT:normal;COLOR:#000000;FONT-STYLE:normal;DISPLA=
Y:inline">
<div>I found the voltage regulator was misadjusted when i
got my car.=C2=A0 At 17V, a new pump quit working in less tha=
n
a year.=C2=A0 At 14V, the replacement is 10 years old and
happily ticking away.=C2=A0
<div>=C2=A0</div>
<div>Tom</div>
</div>
<div>=C2=A0</div>
<div class=3D"gmail_quote">
<div dir=3D"ltr">On Tue, Nov 27, 2018, 9:16 PM Frank
Magnusson <<a href=3D"mailto:fmags@cox.net"; target=3D"_b=
lank" rel=3D"noreferrer">fmags@cox.net</a> wrote:<br>
</div>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT:1ex;M=
ARGIN:0px 0px 0px 0.8ex;BORDER-LEFT:#ccc 1px solid">
<div vlink=3D"#954F72" link=3D"#0563C1" lang=3D"EN-US">
<div class=3D"m_-859660861838157m_-9069400391176008071Wor=
dSection1">
<p class=3D"MsoNormal">Hi Bob,</p>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal">I=E2=80=99m also not sure why yo=
u=E2=80=99re
having problems with pumps.=C2=A0 Maybe something
common between all of them; the vent, the ground,
the venting of the fuel system, etc.</p>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal">I replaced my original pump in
the late 80=E2=80=99s with a stock SU pump with point=
s and
it=E2=80=99s been on the car ever since; no problems
except last year when it didn=E2=80=99t want to start=
, but
a rap with a rubber mallet and it=E2=80=99s been work=
ing
ever since.</p>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal">Try Healey Surgeons for a
replacement pump.=C2=A0 Their parts are 100% correct
and I=E2=80=99ve never had a problem with anything fr=
om
them in almost 30 years.</p>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal">Best of luck,</p>
<p class=3D"MsoNormal">Frank</p>
<p class=3D"MsoNormal">=E2=80=9965 BJ8</p>
</div>
<div id=3D"m_-859660861838157m_-9069400391176008071DAB4FA=
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<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; rel=3D"noreferre=
r noreferrer" target=3D"_blank">http://autox.team.net/mailman/listinfo/heal=
eys</a><br>
<br>
s/michaelsalter@gmail.com" rel=3D"noreferrer noreferrer" target=3D"_blank">=
http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com</a><b=
r>
<br>
</blockquote></div>
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