Installation manual

PROTECTIVE WIRE

SCREEN IN THE

WATER SEPARATOR

NIPPLE

AirDog®

WATER

SEPARATOR

PureFlow AirDog

AirDog

II Demand Flow 2001-2009 DuraMax Diesel

Section 8 Fuel Filter & Water Separator

Filter Service Recommendations

Plugging of either the fuel filter, the screen in the water separator nipple or the water

separator itself will cause low fuel pressure and low blow to the engine. Should you

experience low fuel pressure, first check the screen in the water separator nipple. If it is

blocked by a film or debris, unscrew the nipple from the base, clean the screen, then re-

install the nipple. If the screen is not restricted, check the water separator for plugging and

restriction, then replace as necessary! If the low fuel pressure issue continues, replace the

fuel filter.

AirDog®

2 Micron Fuel Filter

Drain Valve

The Water Separator

Replace the water separator every other time you change the Fuel Filter or if it becomes

damaged or plugged. It is suggested to check/drain the water separator every three months

or as needed should you experience excessive ‘water in fuel’ conditions. When installing the

water separator, be sure to clean the underside of the AirDog II base. Follow the

instructions printed on the pre-filter for proper tightening procedures.

Caution: Be extremely careful to prevent any contaminates or debris from entering the

pre-filter when removing it for cleaning! Large debris will jam the Gerotor and cause the

fuse to blow. This is not a warranty item. Should this happen, you can easily put the system

back into working order. See the instructions on “How to clean the Gerotor” for proper

procedures

The Fuel Filter

Remove the fuel filter by turning it counter clockwise. Do Not pre-fill the fuel filter with

fuel. The AirDog II will fill the filter and prime the system automatically. Follow the

instructions on the filter for proper tightening procedures.

CAUTION: Dispose of waste fuel and used filters properly to protect OUR

environment!