[C320-list] Perkins M30 Secondary Fuel Filter Mystery

[Donald Poole]

I have discovered that after sitting overnight fuel is draining out of the
secondary filter housing ( evidenced by removing the bleed plug and seeing
no fuel - took a while and a lot of starting attempts and bleeding to find
this). This requires bleeding air from the fuel system every morning before
starting the engine. Of course before I discovered this I put my batteries
and starter motor through quite a workout. Now at least I know what I have
to do after my coffee each morning; although eventually I will wear out the
bleed bolt and washer so I really have to solve this. Also getting tired of
playing in diesel fuel every morning. There is no evidence of any fuel
leakage externally so I have assumed that the disappearing fuel is draining
back to the tank via the return line but I don't know why. Has anyone
experienced this and found a way to stop it? Could the fuel be going
somewhere else?