PureFlow AirDog DF-165-4G - GM Duramax 2015+ User Manual

Page 21

Installing a New Filter

1. Clean the area around the filter head and groove or seal area.

NOTE: Lubricate the seal with oil. Do not use diesel fuel to lubricate the seal.

2. Install a new fuel filter on the filter head. Turn clock-wise until the filter contacts the seal.

Tighten the filter one full turn or follow tightening instructions on filter after contact with the
seal has been made.

NOTE: It is not necessary to pre-fill the fuel filter!

CAUTION: DO NOT OVER TIGHTEN, OVER TIGHTENING CAN DISTORT THREADS
OR DAMAGE THE FILTER SEAL.

3. To prime the filter, turn the ignition switch to the on position. Start the engine.

Water Separator

With the engine turned off, pinch off the suction line. Open valve on the bottom of the water
separator. Drain into a suitable container until all water has been removed. Close valve. Remove
the pinch in the suction.

DRAINING: The water separator should be serviced once a month or when severe water in fuel
conditions require.

NOTE: Collect all spilled fuel and dispose of in accordance with federal, state and local
regulations.