NO PRIMARY FILTER

Is it ok or not run my truck for 600 miles without a primary filter (before fuel pump)? I have a filter between the pump and before the head. I have a FASS (fuel air separation system) that just started to contually blowing the inline fuse. And without the FASS pump working, the fuel fiter on it starts getting air into it in about 40-50 miles. Not too sure why now, as my FASS has always still filtered without a problem when the pump quit. I've had a pump quit before. I have the primary filter head at my shop-600 miles away, and will reinstall there instead of buying one on the road.

 

Freightliner defines the filter between pump and the head on a S60 as secondary. I've owned one for 23 years, and when I go into a shop to get some, that's what is brought out. But that is moot. As far as water getting through, I am not so worried. I live in Colorado with low humidity, so I am thinking I am alright there. I drain my FASS water separater every 250 gal into an old Howes jug and never can see water, too. I was more concerned about the fuel pump. I really don't know what the inside of one looks like. I was thinking nothing could really be damaged by unfiltered fuel-but just don't know. Thanks for the response