ASTM_D_6681_-_15.pdf

Designation:D668115Standard Test Method forEvaluation of Engine Oils in a High Speed,Single-CylinderDiesel EngineCaterpillar 1P Test Procedure1This standard is issued under the fixed designation D6681;the number immediately following the designation indicates the year oforiginal adoption 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 test method described inthis standard.However,the ASTM Test Monitoring Center(TMC)2provides calibration oils and anassessment of the test results obtained on those oils by the laboratory.By this means the laboratorywill know whether their use of the test method gives results statistically similar to those obtained 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 has such a requirementin some of its engine oil specifications.Accordingly,this test method is written for those laboratoriesthat use the TMC services.Laboratories that choose not to use these services should ignore thoseportions of the test method that refer to the TMC.Information Letters issued periodically by the TMCmay modify this method.3In addition,the TMC may issue supplementary memoranda related to thetest method.1.Scope*1.1 This test method covers and is required to evaluate theperformance of engine oils intended to satisfy certainAmericanPetroleum Institute(API)C service categories(included inSpecification D4485).It is performed in a laboratory using astandardized high-speed,single-cylinder diesel engine.4Pistonand ring groove deposit-forming tendency and oil consumptionis measured.The piston,the rings,and the liner are alsoexamined for distress and the rings for mobility.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 ExceptionsWhere there is no direct SI equivalentsuch as screw threads,National Pipe Threads/diameters,tubingsize,or where there is a sole source supply equipmentspecification.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Being an enginetest method,this standard does have definite hazards thatrequire safe practices(see Appendix X2 on Safety).1.4 The following is the Table of Contents:SectionScope1Referenced Documents2Terminology3Summary of Test Method4Significance and Use5Apparatus and Installation6Intake Air System6.2.1Exhaust System6.2.2Fuel System6.2.3Oil Consumption System6.2.4Engine Oil System6.2.5Oil Heating System6.2.5.1Oil Sample Valve6.2.5.2Engine Coolant System6.2.6Engine Instrumentation6.2.7Reagents and Materials7Oil Samples8Preparation of Apparatus9General Engine Assembly Practices9.1Complete Engine Inspection9.2Copper Components9.3Engine Lubricant System Flush9.4Engine Piston Cooling Jets9.5Engine Measurements and Inspections9.6Cylinder Head9.7Valve Guide Bushings9.81This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.B0.02 on Heavy Duty Engine Oils.Current edition approved April 1,2015.Published May 2015.Originallyapproved in 2001.Last previous edition approved in 2014 as D6681 14.DOI:10.1520/D6681-15.2ASTM Test Monitoring Center(TMC),6555 Penn Ave.,Pittsburgh,PA152064489.3This edition incorporates revisions contained in all information letters through142.Users of this test method shall contact the ASTM Test Monitoring Center toobtain the most recent information letters.4Available from Caterpillar Inc.,Engine System Technology Development,P.O.Box 610,Mossville,IL 61552-0610.*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 States1 SectionFuel Injector9.9Piston and Rings9.10Cylinder Liner9.11Compression Ratio9.12Engine Timing9.13Engine Coolant System Cleaning Procedure9.14Calibration and Standardization10Test Cell Instrumentation10.1Instrumentation Standards10.2Coolant Flow10.3Re-calibration Requirements10.4Fuel Injectors10.5Air Flow10.6Intake Air Barrel10.7Fuel Filter10.8Oil Scale Flow Rates10.9Calibration of Test Stands10.10Extending Test Stand Calibration Period10.11Test Run Numbering10.13Humidity Calibration Requirements10.14Calibration of Piston Deposit Raters10.15Procedure11Engine Break-in Procedure11.1Cool-down Procedure11.2Warm-up Procedure11.3Shutdowns and Lost Time11.4Periodic Measurements11.5Engine Control Systems11.6Engine Coolant11.6.1Engine Fuel System11.6.2Engine O