Dodge Cummins AirDog 2-4G Fuel Air Separation Systems

Dodge Cummins AirDog 2-4G Fuel Air Separation Systems

PureFlow AirDog Offers the 4th Generator Fuel Preporator for the Dodge Ram Cummins Turbo Diesel engines in these models.

  • A6SABD424 DF-165-4G 1994 to 1998   12 Valve 5.9L Cummins
  • A6SABD425 DF-165-4G 1998.5 to 2004 24 Valve 5.9L Cummins     
  • A6SABD426 DF-165-4G 2005 to 2016 2.9L and 6.7L Cummins  

The AirDog® II-4G fuel air separation system increases engine and fuel economy by:

  • Overcomes power loss of diesel engines operating at higher altitudes. 
  • Optimizes Proper Fuel Injection System Timing 
  • Maintains the highly pressurized diesel fuel spray
  • Allows for a Full Complete Burn Of Diesel Fuel During the Power Stroke.rn of the injected diesel fuel.



Benefits of the AirDog® II-4G:

    Increased Fuel Economy
    Increased Power Output
    Increased Torque Output
    Help increase fuel injection system life. 
    Improved Throttle Response
    Reduced Exhaust Emissions
    Optimized Engine Performance




PureFlow AirDog® II-4G Fuel Preparator Features:

    Dual Feed Gerotor Pump
    Low amperage motor provides efficiency and endurance
    Self-aligning motor requires less maintenance and reduces noise levels
    Intermediate pump shaft separates motor from fuel
    Small & Compact: ONLY 7"L X 10"T X 3.2"W

The AirDog® II-4G kit includes everything you need for straightforward  installation:

All-Inclusive Installation Kit includes:

Relay Control Wiring Harness

Fuel Module Up-Grade (when required)

All Fuel Fittings Required

Mounting Hardware

1/2" Fuel Lines W/ OEM Style Quick Connect Fittings

AirDog® II-4G Bracket & Spacer

Plastic Ties

Installation Manual

AirDog® II-4G Fuel Air Separation System featuring Demand Flow Technology and Enhanced Features

AirDog® II-4G is designed to operate at flows and pressures beyond the maximum requirements of the engine. It receives fuel under vacuum from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of water.

The fuel passes through the water separator which removes the large particulate contaminates that could damage or jam the gear rotor fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining enters the fuel pump.

The fuel, now under positive pressure flow, enters the fuel filter. As the fuel passes through the filter media and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated. Through the positive fuel air separation features of the patented AirDog® II-4G the separated air/vapor is discharged from the filter and back to the fuel tank through the Primary Air/Vapor Discharge Port.

The fuel passing through the filter media is now free of contaminates and power robbing air/vapor. At pressures and flows able to meet the needs of the engine, it exits the fuel filter through two passageways. First, the fuel for the engine passes into the fuel pickup tube and on to the engine. Then, the excess fuel not needed by the engine recycles internally through the pressure regulator back to the water separator.

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