Contaminants for Testing Air Brake Components and Auxiliary Pneumatic Devices - Truck and Bus
J2024_202211
This SAE Information Report establishes a minimum level of uniform recipes for contaminants which may be used when durability testing pneumatic components to obtain additional information on how a device may perform under more true-to-life operating conditions. This type of contamination testing, however, is not meant to replace the type of performance testing described in SAE J1409 and SAE J1410. Durability testing in the presence of contamination will yield results more reflective of actual in-service field conditions and provide an additional evaluation of pneumatic devices.
While the contaminant supply rate and other test criteria of the device being tested must be set by the device manufacturer or user, the items covered in this document will be:
Rationale:
The purpose of this revision is to modify the language/description of the oil used in Section 3. The contaminated oil mixture is currently described in Section 3 as consisting of “11 parts SAE 15W40CD type oil or most current API certified oil (i.e., CJ) to one part SOFTC-2A contaminant.” Since API oil service requirements are constantly being reviewed and updated, it is inevitable that older grades, such as the SAE 15W40CD grade originally listed, will eventually become obsolete and/or unavailable. The revision to this document is to change the oil description in Section 3 as noted above to “SAE 15W40 (current API Diesel C Service Category for four-stroke diesel engines, such as API CK4—current as of 2018)” so that most current and applicable oil grades that become standardized for service will be used in the contaminant mixture, keeping the test relevant for future vehicles. Note that the phrase “such as API CK4—current as of 2018” is added to clarify the current API service category. In conjunction with this change, the revision will also include a change to the oil reference in Section 4 from “SAE 15W40CD-type oil” to “SAE 15W40 (current API Diesel C Service Category for four-stroke diesel engines).”
Related Topics:
Diesel / compression ignition engines
Methanol
Pneumatic systems
Engine lubrication systems
Air brakes
Materials properties
Brake components
Lubricating oils
Test procedures
Performance tests
Also known as: SAE J 2024
SAE MOBILUS
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