The non-return valve at the connection coupling for the formed hose from the filler pipe is located inside the fuel tank. It prevents fuel from flowing out in the event of an accident.
Particular care must be taken when checking to ensure that the non-return valve moves smoothly.
In order to check the movement of the non-return valve, the formed hose can be temporarily pressed together at the point indicated by the arrows. In this way, the fuel is forced into the tank and flows back again. The non-return valve can be heard to move as the result of this flow of fuel.
1 |
Formed hose from filler pipe to tank connection union |
2 |
Tank connection union, in which the non-return valve is located |