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Selecting the appropriate hydraulic fluid for Sauer Danfoss hydraulic pumps is crucial for ensuring efficient operation, longevity, and reliability of the hydraulic system. Given the variety of hydraulic fluids available in the market, making the right choice can be challenging. Below are important factors to consider when selecting compatible hydraulic fluids for these pumps.
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Understanding the Requirements

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The first step in selecting hydraulic fluid is to review the manufacturer’s specifications for the specific Sauer Danfoss pump model. These specifications provide essential information about the fluid’s viscosity, temperature range, and additives that are suitable for optimal performance.
Viscosity
Viscosity is a critical property of hydraulic fluids that impacts the fluid’s ability to lubricate, the pump’s efficiency, and overall system performance. Generally, Sauer Danfoss hydraulic pumps operate best with hydraulic fluids that have a viscosity rating as recommended in the technical documentation. It is important to maintain the viscosity within the recommended range to avoid issues such as excessive wear or reduced efficiency.
Temperature Stability
Hydraulic fluids must perform effectively across a wide range of temperatures. Fluid thermal stability is essential to prevent oxidation and degradation. Look for fluids that demonstrate high thermal stability, especially if the hydraulic system operates in extreme temperature conditions. Be aware of the fluid’s pour point and flash point as they relate to the operating environment.
Additives
Hydraulic fluids often contain additives that enhance performance, such as anti-wear agents, rust inhibitors, and anti-foaming agents. It’s vital to choose fluids that have the right balance of additives suited for Sauer Danfoss pumps. Using fluids with inappropriate additives can lead to corrosion or insufficient lubrication, which could shorten pump life.
Compatibility
Ensure that the chosen hydraulic fluid is chemically compatible with the seals and materials used in Sauer Danfoss pumps. Some fluids may cause swelling or degradation of seals, leading to leaks and system failure. Always consult compatibility charts or the manufacturer for guidance.
Fluid Type