JCB 3DX how to stop diesel leakage from Air vent

hello friends
in this video explained about diesel leakage
and also some information about
JCB company
JCB machines are almost always Yellow mainly for safety reasons. On a building site or a quarry, you are more likely to see a machine which is Yellow than any other colour. Some customers do prefer their own colour machines and the second most common JCB colour machines are Green followed