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<div class="moz-cite-prefix">These are supposed to be of reasonable
quality, however you may have to add a small accumulator in the
pressure line to compensate for the air chamber as used in many
SU-pumps. They are quite common in the Netherlands.<br>
There is also an Australian SU look-a like with a black plastic
coil housing. The make eludes me at the moment due to age I
suppose. Quality is supposed to be OK as well. Both pumps are
electronic.<br>
Contrary to the usual replacements these pumps stop when the max.
pressure has been reached, similar to the SU pumps.<br>
Kees Oudesluijs<br>
<br>
<br>
Op 23-11-2016 om 1:23 schreef Bob Spidell:<br>
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<div>Stumbled across this the other day (they also have them for
later cars):<br>
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<div><a moz-do-not-send="true"
href="http://www.bpnorthwest.com/austin-healey/bn1-bn2/fuel-system/fuel-pump-electronic-dual-polarity-bn1-bn4-mg-tf-mga-mgb-to-64.html">http://www.bpnorthwest.com/austin-healey/bn1-bn2/fuel-system/fuel-pump-electronic-dual-polarity-bn1-bn4-mg-tf-mga-mgb-to-64.html</a></div>
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<div>NFI, and I've never used one.<br>
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<div>Bob<br>
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My car had a generic 'modern' plastic pump which worked fine
but isn't<br>
quite kosher so I got a new SU pump from Burlen and that is
where I<br>
discovered the diaphragm issue. It really does let quite a bit
of<br>
petrol smell through- enough for me to take it apart and look
for the<br>
leak. Burlen sent a replacement diaphragm which is, of course,
no<br>
better.<br>
<div><br>
</div>
If you have a used 60 year old triple layer diaphragm for sale
I'd be<br>
interested in upgrading my new one!<br>
<div><br>
</div>
The best design I have seen is an Italian copy that had a
single layer<br>
clear plastic diaphragm and also a plastic toggle inside the
points<br>
which is so much simpler than the mousetrap. Been in a Bn2 for
longer<br>
than I have been alive and only needed a replacement inlet
fibre<br>
sealing washer to stop a leak.<br>
<div><br>
</div>
Andy.<br>
<div><br>
</div>
On 11/23/16, Oudesluys <a class="moz-txt-link-rfc2396E" href="mailto:coudesluijs@chello.nl"><coudesluijs@chello.nl></a> wrote:<br>
> I have not come across the single layer diaphragms. I
have seen offered<br>
> on ebay new dual layer ones from China and the UK. So far
I have had<br>
> enough scrap pumps of the wrong type to provide enough
good triple layer<br>
> diaphragms for the ones that were fit for a rebuild as
the so called<br>
> High Pressure type I want, AUF301 or W/AZX1307/8 or
equivalent, so I<br>
> have no experience with the modern replacements.<br>
> The permeation of petrol will probably very, very little
if any, so I<br>
> would not worry about it. Some modern rubbers withstand
all fuels and so<br>
> as long as these are used it will probably be OK. Time
will tell. Anyway<br>
> the pumps cast iron coil housing and the space on top
under the bakelite<br>
> cap over the points assembly is vented.<br>
> As the old triple layer diaphragms seem to last for ever
I would not<br>
> replace them other then when they have become hard and
cracked or when<br>
> the thin plastic membrane that keeps the petrol away from
the rubber is<br>
> damaged.<br>
> Kees Oudesluijs<br>
<br>
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