4D series was designed for aircraft ground servicing vehicles to handle fuel and demineralized water. They are proven reliable with over 40 years of military refueling, de-fueling, and water handling applications. The 4D series is also ideal for water tanker applications. The pump offers five gearbox ratios that enables the user to maximize pump performance within the limits of the engine and transmission.

A special PTO driven version of the 4DG4 series pump provides additional configuration flexibility.