The AirDog II-5G DF-100-5G (A7SPBD338) is a frame-mounted air and fuel separation system for the first-generation 5.9L 12-valve Cummins. It draws from the factory suction fitting and feeds the VE injection pump directly, bypassing the factory filter housing and block-mounted lift pump.

Fuel passes through a water separator and a 2 micron filter, and separated air and vapor return to the tank through a filler neck tee. At 100 gallons per hour, it is sized for stock fuel trucks.

• Air and Vapor Separation: Removes entrained air before fuel reaches the VE pump.
• 2 Micron Filtration: Water separator plus a 2 micron final filter.
• Adjustable Regulator: Diaphragm regulator preset at 13 PSI from the factory.
• Frame Rail Mounting: Sandwich plate system mounts to the frame without welding.
• Uses Factory Suction: Draws through the factory suction fitting in the fuel module.

Technical Specifications

• Part Number: A7SPBD338 (DF-100-5G)
• Flow Rate: 100 GPH
• Preset Pressure: 13 PSI
• Filtration: Water separator and 2 micron fuel filter
• Core Requirement: No core required
• Warranty: Lifetime warranty on the pump head to the original purchaser when set up per AirDog instructions (non-transferable)

Vehicle Fitment & Technical Installation Notes

• Fitment: 1989-1993 Dodge Ram 250/350 with the 5.9L 12-valve Cummins and Bosch VE rotary injection pump
• Installation Tip: Adjust pressure only with a fuel pressure gauge installed, and re-torque the regulator jam nut after any adjustment.