DIESEL Keeper ASD A for VOLVO, MERCEDES, MAN, Series 3

Design features

DIESEL Keeper ASD A Series 3 for Volvo, Mercedes and MAN Heavy duty trucks.   This Anti-Siphon Device fits on the diesel fuel tank inlet of most newer Volvo, Mercedes or MAN trucks where the fuel cap has two pins. 

The top grid has a honeycomb shape inside the fill neck, and the bottom grid has a similarly sized honeycomb shape.  The top flange has thirteen trapezium openings around the circumference of the neck to allow for air to escape as the tank is filled. The top flange also has three holes to accommodate the snap-off screws, and one diagonal slot that can be used for checking the fuel level with a dip stick, or to allow for DOT fuel inspections.

The device also comes with a total of three snap off screws and a "plate" that to which two of the the screws attach.  The locking snap off screw is our part number DK-SOC-08-12 and is designed to lock the ASD into place.  Upon installation, this screw is to be aligned with one of the pins on the fuel tank.

Locking Snap off screw

ASD Plate and plate screws

At the bottom of the device there are ten flow slots. The Device comes with a built in filler neck extension. The diameter of the upper flange is approximately 4.2" (107mm) and the device is about 4.725" (120mm) tall when measured from the bottom flow grid to the top of the flange. 

The Device is designed to fit onto the diesel fuel tank with the top part extending 1.2" (30mm) above the diesel tank.  One can continue to use the machines existing diesel cap. Any diesel screen below the diesel cap would need to be removed to allow for fitting and installation of the unit.