1、Designation:D748421bStandard Test Method forEvaluation of Automotive Engine Oils for Valve-Train WearPerformance in Cummins ISB Medium-Duty Diesel Engine1This standard is issued under the fixed designation D7484;the number immediately following the designation indicates the year oforiginal adoption
2、or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONAny properly equipped laboratory,without outside assistance,can use the procedure d
3、escribed inthis test method.However,the ASTM Test Monitoring Center(TMC)2provides reference oils and anassessment of the test results obtained on those oils by the laboratory.By these means,the laboratorywill know whether its use of the test method gives results statistically similar to those obtain
4、ed byother laboratories.Furthermore,various agencies require that a laboratory utilize the TMC services inseeking qualification of oils against specifications.For example,the U.S.Army imposes such arequirement in connection with several Army engine lubricating oil specifications.Accordingly,this tes
5、t method is written for use by laboratories that utilize the TMC services.Laboratories that choose not to use these services may simply ignore those portions of the test methodthat refer to the TMC.This test method may be modified by means of information letters issued by the TMC.2In addition,the TM
6、C may issue supplementary memoranda related to the method.ASTM International policy is to encourage the development of test procedures based on genericequipment.It is recognized that there are occasions where critical/sole-source equipment has beenapproved by the technical committee(surveillance pan
7、el/task force)and is required by the testprocedure.The technical committee that oversees the test procedure is encouraged to clearly identifyif the part is considered critical in the test procedure.If a part is deemed to be critical,ASTMencourages alternative suppliers to be given the opportunity fo
8、r consideration of supplying the criticalpart/component providing they meet the approval process set forth by the technical committee.An alternative supplier can start the process by initiating contact with the technical committee(current chairs shown on ASTM TMC website).The supplier should advise
9、on the details of the partthat is intended to be supplied.The technical committee will review the request and determinefeasibility of an alternative supplier for the requested replacement critical part.In the event that areplacement critical part has been identified and proven equivalent the sole-so
10、urce supplier footnoteshall be removed from the test procedure.1.Scope*1.1 This test method,commonly referred to as the CumminsISB Test,covers the utilization of a modern,5.9 L,dieselengine equipped with exhaust gas recirculation and is used toevaluate oil performance with regard to valve-train wear
11、.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.2.1 ExceptionsSI units are provided for all parametersexcept where there is no direct equivalent such as the units forscrew threads,National Pipe Threads/diameters,tubing siz
12、e,orwhere there is a sole source of supply equipment specification.1.2.2 See also A7.1 for clarification;it does not supersede1.2 and 1.2.1.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is the1This test method is under the jurisdiction of A
13、STM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.B0 on Automotive Lubricants.Current edition approved Oct.1,2021.Published October 2021.Originallyapproved in 2008.Last previous edition approved in 2021 as D7484 21a.DOI:10.1520/D74
14、84-21B.2Until the next revision of this test method,the ASTM Test Monitoring Centerwill update changes in the test method by means of information letters.Informationletters may be obtained from theASTM Test Monitoring Center,6555 PennAvenue,Pittsburgh,PA 15206-4489.Attention Administrator.This editi
15、on incorporatesrevisions in all information letters through No.21-2.www.astmtmc.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed i
16、n accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1responsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.See Annex A1 for general safety precautions.
