Note: The fuel hose fittings on the fuel filter -1-, on the fuel temperature sender -2- and the quick-release couplings are equipped with a two-wave profile -arrows- and a crease lip. This improves the tightness of the fuel system. When removing the fuel hoses, the thin insulating layer on the inside of the fuel hoses is destroyed. This damage is not visible from the outside. However, after some time, this can lead to a depressurization of the fuel system. If the fuel filter needs to be removed only in order to make room, the hoses from the fuel filter and high pressure pump can not be disconnected. Place the fuel filter with hoses connected on the engine to avoid unnecessary hose changes. If possible, disconnect the fuel system in the engine compartment in other places. Unlocking and disconnecting quick couplers.
Carefully! Once the fuel hoses have been removed from the two-wave profile wrinkled lip fittings, these hoses must be replaced.
If the fuel hose is not removed from the fitting by hand
Carefully! Never insert a screwdriver or similar tool between the hose and the fitting: risk of damage to the hose fittings - the assembly must be replaced.
Use appropriate pliers to turn the fuel hose and remove it.
If the fuel hose is still not removed from the fitting
Cut the hose along the fitting only up to the textile layer and remove the hose. The inner rubber layer cannot be cut through. Nozzle damage will require replacement of the entire assembly.
Note: Before fitting a new fuel hose, thoroughly clean the fitting of grease, oil and dirt. Do not use metal tools for this, which can damage the fitting. Push on the fuel hose without using grease and secure with a spring clip.