Initial start procedure, Checking for excessive pump noise, Pureflow airdog airdog – PureFlow AirDog DF-165 - 6.0L Ford 2003-2007 User Manual

Page 17

PureFlow AirDog

AirDog

II Demand Flow Ford PowerStroke 2003-2007 6.0L

Section 7 Initial Startup Procedures

Initial Start Procedure.

VERY IMPORTANT: Before starting the engine, be sure the power supply to
the OE Fuel Pump, located on the driver’s side frame rail has been disconnected
from the Pump if the pump has not been previously removed!

The AirDog

II is a self priming system, however, to prevent possible damage to the system, it

is recommended to fill the pre-filter with diesel fuel before initial startup.

7-1.

Pre-fill the pre-filter with diesel fuel.

7-2.

Turn the starter key to the on/run position.

7-3.

While the AirDog

II is operating, bleed the fuel line to the engine of air by loosening

the fuel line connection at the engine fitting. As soon as the line is purged of air and
pure fuel is observed, properly tighten the fuel fitting.

NOTE: put a rag or shop towel

over and around fitting to prevent splatter. Catch all spilled fuel and dispose of properly.

7-4.

Start engine.

RECHECK ALL FUEL FITTINGS FOR LEAKAGE AND PROPERLY TORQUE. BE
SURE ALL FUEL LINES ARE PROPERLY ROUTED TO PROTECT FROM
EXCESSIVE HEAT AND SECURED TO PROTECT FROM CHAFFING AND
ABRASION. RECHECK ALL ELECTRICAL LINES, SECURE AS NECESSARY.

Checking for Excessive Pump Noise.

NOTE: Each AirDog

II has been manufactured in a Quality Controlled process and wet tested

for operation and performance before shipment. This is a very quiet and smooth running
system. With fuel or air alone, the AirDog

II fuel pump will run very quietly. However, if any

fuel fitting on the vacuum side, between the fuel tank and the AirDog

II or the pre-filter has

been left loose during the installation process, the system may be sucking air at an excessive
rate and will be very noisy. Excessive restriction in the suction line from the fuel tank can cause
vapor and noise, as well. To check for these problems, unscrew the pre-filter 3 or 4 full turns
and activate the AirDog

II by turning the ignition switch to on If the AirDog

II runs quietly,

then excessive air from a loose fitting or leaking pre-filter seal or vapor from fuel flow
restriction is most likely the reason for the excessive noise. Correct as necessary.

The seal groove in the 3” filter is a snug fit and on occasion the seal has been found

to not be fully seated. Remove the pre-filter, remove the seal from the top of the nut

plate. Clean and lubricate the seal grove. Carefully replace the seal in the grove. Be sure

to fully seat the seal.

Check all fittings, especially the quick connect at the tank.