I've never owned a superduty can't stand the look of them. only 97 and older Fseries owned by me and several 7.3 powerstroke vans.
so I was right about older powerstrokes with the mechanical pumps, and about the electric pumps in the superduty, just not the location of the electric pump......................
did a PMA on a 2008 f550 on thurs, with a 6.4 . the engineer who put the primary filter inside the frame rail with pump was a ******. any extra parts/accessories installed on L frame rail of these trucks makes the filter inaccessible. I got it changed but I'm pretty sure there is some rust in the primary filter housing now! only way I could remove the filter lid to get filter out was to bend the brake line out of the way. that engineer's father should have been neutered .
**had to replace the dual tank valve on dad's 90 F350 because it would suck air on the front tank , but not on the rear. was an interesting find, had never seen it before or since. it would only mess up in the winter, and had to bypass the switch on each tank to finally figure out the problem. didn't have a heated shop at the time so it was a real messy job. but it would never screwed up until it was well below freezing (-10C or so) a few tank switch overs. it did not leak externally at all. **