Initial start procedure, Checking pump noise, Pureflow airdog airdog®ii df-200 – PureFlow AirDog DF-200 - Dodge Cummins 1994-1998 User Manual

Page 21

PureFlow AirDog

AirDog®II DF-200

Dodge Cummins 1994 - 1998

Section 7 Initial Startup Procedures

INITIAL START PROCEDURE

The AirDog

II is a self priming system, however, to prevent potential damage and reduce the

life expectancy of the system, it is recommended to pre-fill the pre-filter and fuel filter with
diesel fuel before initial startup.

7-1.

Turn the starter key to the on/run position.

NOTE: It may be necessary to momentarily engage the starter in order for the ECM
to energize the AirDog

II.

7-2.

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.

7-3.

Start engine!

RECHECK ALL FUEL FITTINGS FOR LEAKAGE AND PROPER 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 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 suck air at an
excessive rate and will be very noisy. Additionally, should the suction line be pinched or
restricted, cavitation can cause vapor to form. Vapor passing through the gerotor will also
cause loud noise.

To check for this problem, unscrew the pre-filter 3 or 4 full turns and activate the AirDog

by turning the ignition switch to on. If the AirDog

II runs quietly, then excessive air from a

loose fitting, leaking pre-filter seal or vapor caused by restriction and a high vacuum is most
likely the reason for the excessive noise. Correct as necessary.

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

For the AirDog®II gerotor pump to operate quietly, the maximum vacuum level

allowable at the fuel inlet port should be no greater than 12” hg.