Electric fuel pump 6 volt

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  • This topic has 9 replies, 5 voices, and was last updated 4 years ago by Larry Lewis.
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  • 21st April 2021 at 8:28 am #28159
    Joseph Dobson
    Participant

      I am having a problem with the SEV pump on my 1957 Traction as it seems to be incapable of pumping sufficient fuel to keep the engine running at idle speeds but works to some extent if the engine is revved.  I have tried various solutions including cleaning all the jets on the carb, re-setting the ignition, cleaning the plugs and  adjusting the tappets again, all without any improvement.  Can anyone suggest a 6 volt pump that has proved to work without failure. AES have an SU 6 volt pump, has anyone tried it  or is there another solution ?

      Joseph Dobson

      21st April 2021 at 12:00 pm #28160
      Bernie
      Participant

        Joseph,

        It sounds as if you ought to check the fuel pump itself … faulty non-return valve? … damaged diaphragm? … bent or worn cam follower?

        I do have an additional switched electric pump on my car although, in general, the mechanical unit is more than adequate.  I only ever use the electric one to prime the system after the car has been stood for a very long time and all fuel has drained from the mechanical pump (it saves all the tedious hand pumping).  It is fitted in-line with, and just before, the mechanical pump.  Should it ever become necessary, it is perfectly capable of being run permanently.

        20210421_114128

        There are a number of 6V pumps on eBay …

        https://www.ebay.co.uk/itm/3-x-9-1393239-5-RT314006-TE-PCB-RELAYS-SPDT-6V-16A/224287132313

        …. and, although none appear to be exactly the same model as mine, I would expect most if not all to be suitable.

        b….

        21st April 2021 at 3:11 pm #28161
        Nigel Watling
        Participant

          Carb

          Hello Joseph

          Like Bernie  says, sounds like a mechanical fuel pump issue.

          Don’t know if this will help, I added an asbestos type mat to the underside of the heat shield, I think there is something normally fitted there but mine was missing,  a thick plastic spacer between carb and manifold, an electric fuel pump and inline filter fitted onto the jambonneau and done away with the mechanical pump completely , also replaced fuel lines engine end with rubber hoses. This all helps with keeping the heat out of the fuel.

          I often run my engine for extended periods at a high RPM (2000 rpm) stationary with bonnets closed and the theory being it dispels any moisture that may build up in the engine and surrounding areas through lack of use and not had a hot starting issue.

          Nigel

           

           

          21st April 2021 at 6:15 pm #28164
          Joseph Dobson
          Participant

            Thank you Bernie and Nigel.

             

            The eBay link you sent Bernie comes up as a relay is this what you intended ? Is that an in line filter fitted before the punp

            I have a new heat shield under the carb that I bought in France.  What make of electric fuel pump have you used Nigel ?

            21st April 2021 at 7:36 pm #28166
            Bernie
            Participant

              Ooops! – trying to do too many things at once. Sorry.

              Correct link …

              https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=6+volt+fuel+pump&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=6+volt+fuel+pump

              If it is still wrong, just Google “6 Volt fuel pump”. Simples!

              There is a non-return valve, not a filter but, if you have any doubts about the cleanliness of the fuel tank, a filter would be advisable.

              Your problem does not seem to be vaporisation so I guess your heatshield is doing it’s job.

              B…..

              21st April 2021 at 9:15 pm #28167
              Nigel Watling
              Participant

                Hi Joseph

                I can’t remember what make/model of pump it was except mine is 12 volts, I did make a point of buying a better quality unit as the cheaper ones are crap and not last, this is born out from experience in the fork truck world with many mechanical pump failures being replaced with electric pumps and the cheaper ones subsequently failing.

                Nigel

                21st April 2021 at 11:07 pm #28168
                Larry Lewis
                Participant

                  You might want to try this one from Jose Franssen. I have one on my 49 BL and have never had a problem with it. It also comes in a vertical configuration. I think the best thing is to put the filter between the tank and the pump.

                  https://www.citroen-traction-avant.com/en/shop/article/595=!822-H/Fuel_pump_new_horizontal

                  22nd April 2021 at 7:46 am #28169
                  Bernie
                  Participant

                    If you do opt for a replacement mechanical pump I strongly recommend you ensure it has a priming lever.

                    The picture is n9t very clear but the Franssen one does appear to have a lever.  I would want to confirm that before buying.

                    B…….

                    22nd April 2021 at 8:39 am #28170
                    Philippe Allison
                    Participant

                      I have one of these fitted to my Big 6. Works well and UK sorced. Has a glass bowl so you can see if it is working (and a lever). Appears to be out of stock at the moment but worth a call.

                      https://www.apukonline.com/20522-fuel-pump.html

                      Regards Philippe Allison

                      22nd April 2021 at 3:20 pm #28178
                      Larry Lewis
                      Participant

                        The one I put from Jose Franssen does have a priming lever- A friend has the one with the glass bowl on his 11B, it interferes with the movement of the shift rods. I think its more suited to the 15/6.

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