question Zetor 6320 stops when gas tank half full

[photosbymorgan2]

Have a 6320 Zetor that will stop running once the gas tank is half full. Have not found any air leakage issues.

Any ideas what I should look for?

Thanks

Paul

 

[Renze]

When it stops, does the filler cap come off, or is it vacuumed? If the breather is plugged it wont feedto the pump.

 

[forterra9641]

it may also have a crack in the suction pipe inside the tank. try to run it from a 10 liter can of fuel . but put both return and suction hose in the 10 liter can. if it runs then the fault is in the tank.