Voith 55.6335

VOITH 55.6335 is an OEM technical approval from the German manufacturer Voith Turbo GmbH that defines the requirements for class B hydraulic retarder oils used in heavy diesel trucks, buses and special equipment. Oil that meets this standard must have stable viscosity over a wide temperature range, high oxidation resistance, wear and corrosion protection, and compatibility with hydraulic system materials and automatic transmissions specified in Voith technical documents (e.g., XA‑TRAN CVT, X‑TRAN). The specification foresees use in systems with diesel particulate filter (DPF) filtration, where low SAPS content is important, ensuring long‑term operation of braking elements without contaminating the catalyst. XENUM products bearing the VOITH 55.6335 marking guarantee compliance with these requirements, providing reliability and stable torque transmission even under high loads.