John Deere d110 oil leak

It appears my 2011 JD d110 is leaking (blowing) oil at the fuel pump vacuum line. The oil level is OK, maybe even a little low. My reason to believe the problem is at the fuel pump vacuum line is after mowing oil is on the fuel pump, the vacuum hose, the frame below the fuel pump and on the top of the mower deck below the fuel pump and frame. Any ideas on what is wrong?

Thanks.

John Deere d110 oil leak