The Airdog II system has been redesigned to be more efficient and reliable than ever before! Our new 4G technology has been combined with proven AirDog II components such as our Demand Flow Technology, Adjustable Fuel Pressure Regulation, and our patented Air/Vapor Separation to create the most advanced direct current fuel pump to date.
Our patented air separation, along with water separation and superior fuel filtration, will ensure your expensive injection components are protected from harmful contaminates. Besides the obvious advantages of superior fuel filtration, the air separation improves injection system life by allowing nothing but a solid column of fuel to enter the injection system. This eliminates metal to metal contact from moving parts that would normally be allowed by air in the fuel.
The patented air separation increases engine efficiency by eliminating spray pattern disruption due to entrained air. This allows the engine to keep its desired injection timing which allows for a more complete burn of fuel entering the cylinder. This increases overall engine efficiency across the power and torque range!
4G motor technology is a smaller version of an industrial hydraulic pump setup. In an industrial hydraulic pump, you have an electric motor connected to the pump by a coupling. The purpose of the coupling is to compensate for minor amounts of misalignment and random movement between the motor shaft and the pump shaft.
The 4G is a four bearing design. There are two bearings supporting the motor shaft and two bearings supporting the pump shaft. The pump shaft, being supported on both ends by bearings, reduces shaft vibration which reduces pump noise and prolongs shaft seal life.
This design allows us to completely remove the electric motor from the fuel pump circuit, which keeps diesel fuel from ever entering the electric motor in the unlikely event of a radial pump shaft seal failure. What does this mean for you? Quieter, longer lasting pump operation!
The installation of the AirDog II-4G system has been designed with the customer in mind. We know not everyone has special tools or fabrication skills, so we made the installation as easy as possible with basic hand tools and the, occasional, power drill. The quick-connect fittings and fuel lines make this a true plug and play installation, reducing the overall installation time. Our step-by-step manual outlines each process of the installation and is accompanied by visual guides to aid your progress.
The AirDog ® II-4G is designed to operate with flows at pressure 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 Gerotor fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining, enters the fuel pump.
The fuel, now under pressure, 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. This process is called Demand Flow. Whatever the engine does not need is recirculated back through the suction side of the fuel pump. This is what allows the AirDog II-4G to have such a low flow return back to the tank.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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