How does Kubota Fuel system in various Models deal with day to day little air leaks?

[coachgeo]

question.... being new to Kubota systems Im curious. Does the Kubota Engines have a built in Air Bleed system? Where air that made its way in somehwere along the way between IP and tank is bleed out and sent back to the tank via the fuel return line or something similar to that concept?

For example on older MB's the fuel filter housing has a bleed hole built into the top with a check valve in it. Air that has made its way into the filter is bleed out the top into the return line... while fuel with no air is sent onto the IP. That is unless so much air is getting in somewhere the bleed system can not keep up.

Guess for my purposes Im thinking mostly of the D1102 engine in my tractor and the D722 we are installing in my Motorcycle. Others may want to know about their tractor engine's fuel system too though.

 

[coachgeo]

Looking closer at my L235 the other night it looks like it's fuel system is similar to the older MB Im familure with. There is a hose from the top of the filter housing to the top of the fuel tank. This would lead me to belive this is an air bleed from the fuel filter bowl to the tank.