AIRDOG II-4G A6SABF493 DF-165-4G AIR/FUEL SEPARATION SYSTEM

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  • Regular price $739.00


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.


The AirDog II-4G system improves engine performance by:
  • Maintaining Correct Injection Timing
  • Eliminating Spray Pattern Disruption
  • Allowing for a Full Power Stroke and Complete Burn

Benefits of the AirDog II-4G:
  • Increased Fuel Economy
  • Increased Power Output
  • Increased Torque Output
  • Longer Injector Life
  • Improved Throttle Response
  • Reduced Exhaust Emissions
  • Optimized Engine Performance
  • AirDog II-4G also overcomes loss of power for diesel engines operating at higher altitudes.


AirDog II-4G Features:
  • AirDog II-4G - Advanced Fuel/Air Separation Fuel Saving Benefits and Technology
  • Preset at 50-55 psi
  • 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
  • Ability to support 500-800 rear wheel horsepower by delivering 165 gallons per hour of fuel
  • Small & Compact: ONLY 7"L X 10"T X 3.2"W

AirDog II-4G 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