Filler Venting

Filler Venting
To provide filler venting, there is a breather unit in the fuel tank consisting of a service breather valve (1 1 ) and filler breather valve (9). There is also a roll over valve (10) on the right hand service access cover. The filler breather valve allows air and fuel vapors to escape from the fuel tank when the vehicle is refuelled (venting).
When the vehicle is refuelled, the air and fuel vapors vent via:
^ The filler breather valve
^ Through the vent line
^ To the roll over valve
^ Through the Fitting on the fuel filler neck
^ Into the activated charcoal filter
When the maximum capacity is reached, the filler breather valve is closed by the fuel lifting the internal float valve. The fuel level rises in the fuel filler neck and trips the fuel pump nozzle. A vapor barrier (approximately 15 liters) remains in the tank above the filler breather valve after the tank has been filled. This provides internal liquid/vapor separation.