Check for leaks first.
If it's not leaking anywhere, I'd swap it out. I don't think anything in there is user-servicable. I could be wrong. My guess is that finding the parts on the road will be a pain. Those pumps are usually easy enough to swap out it wouldn't be worth it to me to fiddle with finding that correct parts while I'm trying to enjoy my trip.
2015 Crossroads Sunset Trail Reserve ST33FR
2007 Ford F350 King Ranch Crew Cab LWB Dually w/ Bulletproofed 6.0 Powerstroke.
Currently located between Georgia and Insanity.
007matman AKA Matt