Help, please: Hissing inside GraverSmith Machine

[Rsepton7230]

So I just bought a used GraverSmith and I was told it is in complete functioning order. Finally got it together today and when I use the air compressor there is a loud hissing sound from inside the GraverSmith. My air compressor also won't fill up and kick off. I am concerned there is something wrong with my machine. I also realized that my compressor was not strong enough but would a stronger compressor make my machine work?

 

[Winstonklein]

Most likely it is an internal urethane tubing leak. A quick fix.

 

[sam]

Yeah, pop the cover off and have a look inside. You probably need to change a tube.