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).”
The Truck and Bus Supply and Control Components Committee of the Truck and Bus Brake and Advanced Driver Assistance Systems Steering Committee is responsible for developing, reviewing, and approving recommended practices, standards, and information reports related to air braked vehicles supply and components and their interfacing as utilized on trucks, tractor-trailers combinations and buses over 4,536 kilograms (10,000 lbs.) GVWR. The activities of this Committee include brake supply and control components and their interfacing, and is not, in any way, to duplicate efforts of any other Committees.
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Contaminants for Testing Air Brake Components and Auxiliary Pneumatic Devices - Truck and Bus
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Contaminants for Testing Air Brake Components and Auxiliary Pneumatic Devices - Truck and Bus
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