Products Fluid Information It takes the right kind of hydraulic fluid to get the top performance from Rexroth hydraulic pumps, piston units, and other products – and the choice of hydraulic fluids has become even more important as sustainable technology becomes a key objective. The information below (all PDF) will help you make the right choice when selecting a hydraulic fluid for your equipment – or selecting an axial piston unit for use with particular fluids. Hydraulic Fluids based on Petroleum Oil and Related Hydrocarbons (for all Rexroth hydraulic components) RE 90 220 (PDF) Environmentally Acceptable Hydraulic Fluids for Axial Piston Units RE 90 221 (PDF) Environmentally Acceptable Hydraulic Fluids HEPG, HEES for Axial Piston Units RE 90 221-01 (PDF) Axial Piston Units for use with HF Fluids RE 90 223 (PDF) Radial Piston Motor MCR for use with HF Fluids RE 90 229 (PDF) To find the most efficient, cost-effective, and sustainable hydraulic fluid for your application, contact us.