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Voith Aquatarder SWR Truck

Braking better without oil:

The new secondary water retarder

Safe, economical and sustainable - that’s the first secondary retarder in the world that uses water for braking. Like the Aquatarder, the secondary water retarder also uses the engine's cooling water as its operating medium. With this, it carries out up to 90% of all vehicle braking operations.
Experience it for yourself: Mercedes Benz Actros, Antos and Arocs.

The facts speak for themselves

The secondary water retarder occupies 50% less installation space than its predecessor, and it is 35 kg lighter. Since it uses the engine's own coolant as its operating medium, it is also completely maintenance-free: no additional oil or coolant changes and no adjustments are necessary. And the environment is happy to have as much as 80% less brake dust.


Voith Aquatarder SWR Voith Aquatarder SWR Voith Aquatarder SWR


Voith GmbH & Co. KGaA
Commercial Vehicles
Hardtstraße 8
74564 Crailsheim
Deutschland, Germany

Tel.: +49 7951 32-1555
Fax: +49 7951 32-1506

Voith GmbH & Co. KGaA
Gottfried-Linke-Straße 205
38239 Salzgitter
Ms Sabrina Lipok
Tel.: +49 5341 21 5446
Mr Sascha Koch
Tel.: +49 5341 21 4872
Fax: +49 5341 21 1830


Technical Service
Tel. +49 7951/32-1555
Fax +49 7951/32-1506

Ordering spare parts
Tel. +49 7951/32-1644
Fax +49 7951/32-756

Secondary water retarder

Technical data

Step-up ratio i =2.13 / i=1.97
max. braking torque at the propshaft 3 500 Nm
Standard operation Multifunction lever 5-stage
+ function v-const
option: foot control
Operation medium Engine coolant in compliance with Mercedes-Benz operating instructions
Control medium compressed air
Unit weight approx. 42 kg
Nominal voltage 24 V

CAN-Bus-specific RCM (Retarder Control Module)

Features and benefits

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

Voith Secondary Water Retarder Wins ECW Innovation Label Award 2013

Aquatarder SWR
wins European
Transport Award for Sustainability

Stakeholder Survey 2018 – Voith GmbH & Co KGaA

We cordially invite you to participate in our Stakeholder Survey 2018.

Its aim is to find out how you evaluate Voith's economic, social and environmental impacts and where you see improvement potentials in terms of the company’s sustainability performance.

The Survey Questionnaire will take around 10 minutes to complete.

Would you like to take part?