At 06:01 PM 7/25/2007, Don Spence wrote...
>Anthony has posted a photo of a disassembled pump. Can someone
>explain how this pumps fuel? Are the innards immersed in the fuel as
>it transits the pump? what provides the pumping action?

I'm pretty sure they're roller vane pumps. The pictures don't show the
internals of the pumping head. The innards are completely full of fuel
when operated, it cools the pump motor.

Here's a diagram of a roller vane pump. Sorry, the text is in German.
http://www.kfz-tech.de/Rollenzellenpumpe.htm

Here's an animation of an ordinary vane pump. Picture the flat vanes
replaced with cylindrical rollers and you'll have the idea.
http://www.mekanizmalar.com/vanepump.shtml