Have a small transformer (T1-Bj 1985) Diesel and suddenly have the problem that he no longer accepts gas and after that he died and I remained “laying”. The breakdown service meant that air is in the fuel line and I should replace the one hose, which is already brittle. I will try this tomorrow, but can’t it be something else? Ok, with the transparent lines You can see that air is there. Can still seep in air? If I have changed the hose, do you have to vent it after that or is it possible? Thank you very much!!!