SAE AS 4059 Contamination Classification Test for Hydraulic Fluids

Hydraulic Test

SAE AS 4059 Contamination Classification Test for Hydraulic Fluids

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of SAE AS 4059 testing. This SAE Aerospace Standard (AS) defines pollution classes and levels for particulate contamination of hydraulic fluids and includes methods for reporting relevant data.

SAE AS 4059 Contamination Classification Test for Hydraulic Fluids

This method applies to those using the methods of previous revisions of AS4059 or cumulative particle counts. The cleanliness levels for this method should be specified in the tables by the appropriate class. To provide versatility, the applicable cleanliness class can be defined in the following ways.

  • Base the class on the highest class of multiple size ranges;
  • The total number of particles larger than a certain size;
  • Specify a class for each size range.

Most component manufacturers are aware of the proportional effect of increased dirt level on the performance of their components and give the maximum allowable contamination levels. They indicate that it will extend the life of components operating in cleaner fluids than specified.

However, hydraulic systems are affected by pressure, duty cycles, environments, required lubrication, types of contaminants, etc. The diversity of the components makes it almost impossible to predict beyond the service life that can reasonably be expected.

Also, without the benefits of key research materials and the availability of standard pollutant susceptibility tests, manufacturers that publish cleaner recommendations than their competitors may be seen as having a more sensitive product. Therefore, comparing recommended cleaning levels from different sources can be a source of conflicting information.

EUROLAB assists manufacturers with SAE AS 4059 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.

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