Ls170 too much pressure in fuel tank???

[UpNorth Mini Excavating]

Hi everyone, so I have a new holland ls170 skid steer. Whenever I fuel it up I notice that there is a big burst of air coming out of the fuel tank when I take the cap off. Now I know that it shouldnt be like that. So my question is does the tank have a vent or does it just vent through the fuel cap? I have the square fuel tank and the machine has about 3600 hours on it. It spits and sputters when i first start the machine for the day like air would have got in the lines. Im thinking that the pressure might have something to do with it? Any suggestions? Thanks

 

[Delmer]

It shouldn't be too hard to see if there's a hole in the fuel cap or not.

You could try a piece of clear tubing on the fuel return to the tank, if air is getting in, it will show up there.

 

[UpNorth Mini Excavating]

So, I noticed that there was a lot of air in the tank when I removed the fuel cap. Changed the fuel cap and everything is back to normal. Thanks