Fuel Line Coupler: Service and Repair

Plug-in couplings for pipelines

Different plug-in couplings are used for various applications (see Allocation).




Allocation of the plug-in couplings / pipelines


Opening and joining plug-in couplings

Important notes
Plug-in couplings are components that permit simple, fast and precise connection of pipelines.

These precision components must be handled carefully during repairs.
Excess force during assembly work, damage to the sealing surface and soiling can cause leakage.

Perform preparations carefully when handling plug-in couplings - e.g. cleaning and fitting the plugs - as repairs are possible only by replacing the affected line in most cases.

After separating the plug and socket piece, carefully protect them against dirt and scratches with caps.

Join the plug-in connection only in a straight line. Never use excessive force.
Pull slightly to make sure the connection is locked properly.


Fuel lines





Operate unlocking button(s) (press) - see arrows and simultaneously separate the pipelines by pulling them apart.

Join the connection by plugging together in a straight line.

The plug (the plug-in part) must audibly engage in the plug-in coupling.

Then pull the connection slightly to check whether it was locked properly.