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pacemaker243
post 20 Oct 2017, 20:00
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Quick question. What is spring (10) and where do it fit ? Not got this. Been given a spare pump. Stripped it cleaned and got it running up to main body (15) . Now when I fit the on (1+) with the six screws it will not run. Slacken the the screws alittle and it runs . Should I fit another gasket between (15) and diaphragm which i can't move in or out. Any help appreciated.. Keith.
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ozieagle
post 20 Oct 2017, 21:58
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Hi Keith,

No idea about that spring. Checking the SU site

http://sucarb.co.uk/technical-electrical-fuel-pumps-single

This is the closest I can come to that pump.

With the need to loosen the screws for it to pump, did you push the diaphragm all the way up, whilst tightening the screws? This stops the diaphragm being too tight to allow the pump to operate. Quite essential.

Herb
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Danny
post 21 Oct 2017, 01:10
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Attached File  pump.jpg ( 113.9K ) Number of downloads: 0


Attached File  spring_loaded.jpg ( 82.38K ) Number of downloads: 0


Hope this helps. It doesn't make any difference to the operation of the pump IME, but might help if you leave it parked on Mt Everest!

Danny

This post has been edited by Danny: 21 Oct 2017, 01:13
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enigmas
post 21 Oct 2017, 01:33
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Why not just clean and polish it...then place it on the mantle piece as a curio/discussion piece, harkening back to supposedly halcyon days (IMG:style_emoticons/default/cool.gif) ...and purchase one of these (Facet Pump. $44.95 AUD. Includes a micro fine filter) knowing that it won't decide to quit functioning when you're miles from home. (Been there...done that on an interstate trip in my 20's)

https://m.ebay.com.au/itm/Facet-Universal-E...7018?nav=SEARCH

(IMG:https://i.ebayimg.com/images/g/2hQAAOSw8HBZKqrr/s-l500.jpg)
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ozieagle
post 21 Oct 2017, 06:35
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You need to be very careful with after market pumps, they may put out too much pressure. Ensure that they are not capable of more than 3-4 psi, or your carbs will flood.

My Wooly came with a Facet, and I replaced it with another, when it died. Then I was given a decrepit SU, which I resurrected and fitted in lieu of the Facet. Been happy with it.

Herb
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wolseley16/60aut...
post 21 Oct 2017, 10:07
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I like the 'tick tick tick ' of the S.U.
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enigmas
post 21 Oct 2017, 11:41
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QUOTE (wolseley16/60auto @ 21 Oct 2017, 21:07 ) *
I like the 'tick tick tick ' of the S.U.


If it makes you happy...fair enough. The facet also goes tick, tick, tick! It's solid state electronic. I have several of them and they're very reliable...one fitted up to a carbed Rover V8. There's a suitable unit for SUs & CD Strombergs.
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pacemaker243
post 21 Oct 2017, 15:00
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Thanks guys!! I'll have it apart again then . I'm a stickler for originality. Would like to know if I could purchase an original condenser/capacitor anywhere? Breakdowns and classic cars go together, that's the fun of it.

Happy motoring Keith.
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Fred Oldham
post 21 Oct 2017, 16:50
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Some people have a strange idea of fun. I find arriving as planned, much more amusing.
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Penguin45
post 21 Oct 2017, 17:35
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QUOTE (pacemaker243 @ 21 Oct 2017, 16:00 ) *
Would like to know if I could purchase an original condenser/capacitor anywhere? Breakdowns and classic cars go together, that's the fun of it.

Happy motoring Keith.

Look no further than the DISTRIBUTOR DOCTOR. Quality ignition parts and Martin is one of the good guys.

P45.
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Danny
post 22 Oct 2017, 01:22
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QUOTE
Would like to know if I could purchase an original condenser/capacitor anywhere?


Keith, did you mean for the SU pump?

Danny
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MYKE
post 22 Oct 2017, 08:31
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It seems to me that spring 10 in the first diagram is spring 31 in the second. It fits under the one way valve in the top of the pump and to be honest, I have not seen many of them. It seems that the valve opens and closes on its own without the need for the spring so it doesn't matter whether you have one or not.

As everyone knows, I'm a great fan of SU pumps, as are most members back here in U.K. whereas members in the Southern Hemisphere are all for turning their classics into moderns.

Maybe it's something to do with us not having so far to walk if we break down, and having the AA and RAC at the other end of the Mobile phone.

This post has been edited by MYKE: 22 Oct 2017, 08:33
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Danny
post 22 Oct 2017, 09:29
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QUOTE
It seems that the valve opens and closes on its own without the need for the spring so it doesn't matter whether you have one or not.


The reason for the spring is clearly indicated in the SU Company notes in post #3. It is to keep a light load on the suction disc when the pump is not running and no it makes no difference to the pump when operating as I said.

Danny
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ozieagle
post 22 Oct 2017, 19:57
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Reading the company notes, that spring is necessary only if the fuel tank is higher (parking on a hill) that the carby. It stops fuel syphoning out

Herb
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Martin Hamilton
post 23 Oct 2017, 14:51
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QUOTE (pacemaker243 @ 20 Oct 2017, 21:00 ) *
Quick question. What is spring (10) and where do it fit ? Not got this. Been given a spare pump. Stripped it cleaned and got it running up to main body (15) . Now when I fit the on (1+) with the six screws it will not run. Slacken the the screws alittle and it runs . Should I fit another gasket between (15) and diaphragm which i can't move in or out. Any help appreciated.. Keith.
Attached File  IMG_20170924_125929.jpg ( 519.74K ) Number of downloads: 0


Hi Keith

Sorry I can't help directly with your problem, but if you need a new pump I have a brand new SU "AZX 1331" pump you can have for £50 (It cost me £110 if I recall correctly). It's the "pusher" pump designed to be fitted next to the tank of a Series IV Oxford (Traveller).

In case you're wondering, I don't need it because the last owner had fitted a cheap and nasty one in the engine compartment. When I tried to fit the new pump in the correct location I found no mountings and all new pipework to feed an engine compartment pump - and so no easy way of fitting it. Being a pusher pump it would probably have overheated if I mounted it in the engine compartment anyway. I've replaced the "el crappo" brand pump with a new Morris 1000 SU "sucker" pump which works a treat.

PM me if you're interested (or anyone else, for that matter)

Cheers
Martin
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pacemaker243
post 25 Oct 2017, 08:32
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QUOTE (Danny @ 22 Oct 2017, 02:22 ) *
Keith, did you mean for the SU pump?

Danny


Yes Danny, the pump condenser / calibrator. My pump is fine, this is for a spare I was given.

This post has been edited by pacemaker243: 25 Oct 2017, 08:43
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Penguin45
post 25 Oct 2017, 13:06
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Looks like it's included in the repair kit. Have a look on THIS PAGE.

P45.
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ozieagle
post 25 Oct 2017, 19:28
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The capacitor is just one of several ways of quenching the spark. SU has used capacitors, originally, diodes and TVSs (Transient voltage suppressor), of 24V rating, which are basically back to back zener diodes. For the mechanical pumps, not electronic, the capacitor and TVS are not polarity sensitive. A diode does make the pump polarity sensitive.

There is a resistance wire wound with the coil, that works in conjunction with the quenching method, to dissipate the energy. A quick and effective fix is to solder a 1 amp diode across the coil, with the bar on the diode towards the positive side of the coil. This does make the pump polarity sensitive.

Or you could go whole hog and electronify the pump.

Herb
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Danny
post 26 Oct 2017, 00:58
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Herb, I hope you're not trying to turn Keith's car into a modern! (IMG:style_emoticons/default/ph34r.gif)

Danny
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pacemaker243
post 26 Oct 2017, 09:29
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QUOTE (Danny @ 26 Oct 2017, 01:58 ) *
Herb, I hope you're not trying to turn Keith's car into a modern! (IMG:style_emoticons/default/ph34r.gif)

Danny


Thanks Danny. I really like the old original stuff. Something you can pull to bits ,see how it works . Feel self achievement after it works again after a good clean. Just I can't find an original capacitor. Yet! The pump works fine now just the wire pulled out of the capacitor. Like I said it's just a spare.
Happy motoring Keith.
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