Small metal shavings in fuel filter

hey on 2005 freightliner only has one fuel/water separator no other fuel filter.

Kinda right after putting diesel kleaner in my tanks I’ve had to change my fuel filters for my truck to go again but I saw some metal shavings in my filter ( right after the fuel tanks)

It’s the fuel fuel pump going bad or I’m wrong ?

Is there only one or two fuel pumps ?

Can it be something else ? I also got an automatic transmission

 

S60 14L

You’re saying it’s possible my fuel tank is contaminated with metal shavings or that’s the reason why I need to keep changing my fuel filters so often ?

Thanks btw

 

Yep the only fuel filter

 

Though when changed my fuel filter this time I put water though the fuel filter housing after I drained the fuel.. there was just too many big and small chunks black particles

 

Personally I don’t know would have to find out I do my own oil changes, change my xy shifter and gasket on my transmission, only the really simple stuff gonna try to find out where that fuel pump is mounted though tomorrow.