I have a 2005 All american rear cummins engine .I may have asked this before so forgive me . There is a hose that hangs off the tank I figured for emissions . When you fill the bus with diesel diesel will flow from this hose . Now I am talking one click off on the nozzle not trying to top if off like an eye dropper . I was told it is roll over valve . If the bus rolls over it's supposed to not let the fuel leave the tank .Any ideas why this happens ? Any easy ideas to fix it ? About a 1/2 gallon will pour from this hose before it stops flowing .I cannot access the top of the tank without removing the tank .I also tried running a longer hose above the tank and that didn't work .
I may have exaggerated a little . I would say a couple cups anyway . The place we fuel up if we spill diesel we have to clean it up . Another thing is the waste over time .