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INTRODUCTION
Thank you for choosing AirDog® for your truck fueling needs!
AirDog® recommends that a certified diesel shop technician install this product.
Please note, if the end user performs the installation, it is recommended they have
basic knowledge on how electric fuel systems operate and function. Failure to properly
set up this fuel system may result in a voided warranty. If properly set up per these
instructions, the pump head carries a lifetime warranty to the original purchaser.
THIS WARRANTY IS NON-TRANSFERRABLE!
The AirDog® II-5G uses an adjustable diaphragm fuel pressure regulator to
regulate the fuel pressure to the injection system. The pressure for this application is
preset from the factory at 15-17psi. If a different pressure is desired, go to page 35 for
instructions on how to adjust the pressure. WARNING: RUNNING THE PUMP ABOVE
75PSI FOR THE DF-100 AND DF-165 AND ABOVE 55PSI FOR THE DF-220 WILL
DECREASE THE LIFE OF THE PUMP SIGNIFICANTLY AND MAY VOID THE
WARRANTY. MORE FUEL PRESSURE DOES NOT MEAN MORE FUEL FLOW AND
TOO HIGH OF PREESURE MAY DAMAGE YOUR INJECTION SYSTEM! MORE
FUEL PRESSURE DOES NOT MEAN MORE FUEL FLOW!
OVERVIEW ON HOW THE SYSTEM OPERATES
The AirDog® draws fuel from the tank from a high flow suction tube installed in
the tank. The fuel is then pulled through a water separator before being pressurized
through the Gerotor pump. The pressurized fuel is sent through the 2 micron fuel filter
before being sent to the engine. The pump maintains pressure through a diaphragm
fuel pressure regulator that recirculates fuel back through the water separator. The
separated air from the diesel fuel is returned through a filler neck return tee.