Paccar fuel filter doesn't stay full

[wedaloda]

There is a small hole on top of the filter next to the rubber seal that gets clogged up. I'm thinking it's there to equalize fuel inside and outside of filter element. I noticed when I changed my filter one time it had a big glob of crap around that rubber seal. When this happens inside of filter stays full of fuel and creates the air pocket around the outside. If that little hole wasn't sunken down in the top like that it probably wouldn't happen as often as it does because any trash will settle to the bottom of everything. Hope this helps everyone with the Paccar setup. Next time this happens check that tiny hole on top.