Stewart Warner 240A Fuel Pump Switch Renewal

Yes - that's the one Pedro.

 

[Randy V]

Brian I wonder if the document I just posted is the same one you have, this one has very good information or replacing the switch.

This *IS* the document I authored... I hope it is of some help!

 

[Pat]

Excellent thread now that I got my hands on a SW 240A. I’ll try and download these documents on my computer later. Sad the photos are long gone. Has anyone gotten more resources for this pumps now? Parts or manuals? Thanks.

 

[Neal]

Here you go…

 

[Mark H.]

Read the above write up by Randy V on the SW240 pump switch. I just took my 240 apart, got the pump to run fine , except will not pump much fuel, just labors, slows down under load from the fuel. Does anyone know if the switch clicks to open the circuit and remains open then clicks closed closing the circuit or should the switch perform as an immediate momentary switch .... off on off on etc...? Thinking the switch may not be cycling and activating correctly when under load as I might have assembled incorrectly . Any info appreciated. Thanks Mark

 

[Randy V]

Read the above write up by Randy V on the SW240 pump switch. I just took my 240 apart, got the pump to run fine , except will not pump much fuel, just labors, slows down under load from the fuel. Does anyone know if the switch clicks to open the circuit and remains open then clicks closed closing the circuit or should the switch perform as an immediate momentary switch .... off on off on etc...? Thinking the switch may not be cycling and activating correctly when under load as I might have assembled incorrectly . Any info appreciated. Thanks Mark

Mark - it sounds like perhaps you still have some varnish on the contacts. I recall having to use very fine emery cloth on them along with contact cleaner. I just can’t recall the exact electrical function of the switch in circuit…

 

[Mark H.]

Thanks for responding Randy. I will clean them again, has a mechanical hard closing and opening like a light switch, even when not under an electrical load. Maybe the issue is elsewhere, weak coil, piston ball not sealing? Pretty intrigue pump comparied to a rotary Holley. I see that Charlie of Gold parts has parts. Have asked him the question too.