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Voith Aquatarder PWR – braking with water

    As the primary retarder, the Aquatarder PWR is mounted on the front of the engine and connected directly to the crankshaft. Unlike a classic oil retarder, it uses the engine coolant as its operating medium. This means that no additional oil changes or adjustment work are necessary. During braking, kinetic energy is converted into heat and dissipated via the vehicle cooling system. This means safe, wear-free braking. The Aquatarder PWR is used in MAN TGS and TGX trucks. The Aquatarder PWR and the pressure-controlled EVBec engine brake together form the MAN PriTarder braking system.

    Features and benefits

    • Higher safety
    • Maintenance-free
    • Low service costs
    • Fewer visits to workshops
    • Less fuel consumption
    • Less emissions

    Technical Data

    Voith Aquatarder PWR  
    Max. nominal braking torque at cank shaft 1 450 Nm
    Operation Standard choice of operating lever or brake pedal
    Operating medium Engine coolant in compliance with MAN operating instructions
    Control medium compressed air
    Retarder weight net approx. 33 kg
    Nominal voltage 24 V
    CAN-Bus-specific electronic control system VERA

    Functional principle



        Service – where your truck is in good hands

          Whether it’s maintenance or repairs, troubleshooting, or the functional testing of individual components: our professionals will make sure you stay on the road. At the Voith retarder workshop in Crailsheim, and throughout the world.

          Judge us by our performance

          • Onboard troubleshooting and upgrade 
          • Replacement and repair 
          • Repair of supplied retarders (all model series) 
          • Troubleshooting and functional testing of individual components 
          • Worldwide delivery of Voith original spare parts, as well as 
          • replacements and basic retarders

          Retarder oil list

          Do you have any questions about Aquatarder PWR? We’re here to help!

            Service contact

            Voith GmbH & Co. KGaA

            Mobility Service

            Hardtstraße 8 74564 Crailsheim, Germany


            t +49 7951 32-531

            Technical Support

            Technical Support


            t +49 7951 32-1555

            f +49 7951 32-1506

            Spare parts orders

            Spare parts orders


            t +49 7951 32-1644

            f +49 7951 32-756