1.1 The test method covers a heavy-duty diesel engine test procedure conducted under high soot conditions to evaluate oil performance with regard to valve train wear, top ring wear, sludge deposits, and oil filter plugging in an EGR environment. This test method is commonly referred to as the Cummins ISM Test.2

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.2.1 Exception—The only exception is where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing sizes, or where there is a sole source of supply equipment specification.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See Annex A1 for general safety precautions.

1.4 Table of Contents:

Precision	13.1
Oil Filter Head Modification	6.1.3
Fuel System	6.2.6
Engine Coolant	7.3
Assessment of Operational Validity	11.9
Oil Filter Plugging	11.5
Parts Reuse and Replacement	8.2.2
Test Report	12
Calculations, Ratings and Test Validity	11
Sensor Locations, Special Hardware, and Engine Block Modifications	Annex A4
Test Stand Configuration	6.2
Solvent	7.5
Keywords	14
Cleaning of Parts	8.1
Significance and Use	5
Downtime	10.7.4
Ring Mass Loss	11.3
Annexes
Normal Shutdown	10.7.1
Blowby Rate	6.2.11
Typical System Configurations	Appendix X1
Reference Oil Test Data Flow	9.10.3
Apparatus	6
Engine Installation and Stand Connections	10.1
Ring Cleaning and Measurement	8.1.8
Oil Consumption	11.7
Crosshead Mass Loss Correction Factor	11.1.8
Emergency Shutdown	10.7.2
Temperatures	8.3.3
Exhaust System	6.2.4
Assessment of Test Interpretability	11.10
Special Use of the Reference Oil Calibration System	9.10.4
Exhaust CO2 Sampling Probe	Annex A13
Coolant System Fill	10.2
Oil Thermostat	8.2.5
Shutdown During Warm-up	10.5.1
Oil Heat Exchanger, Adapter Blocks, Block Off Plate	6.1.2
Reproducibility Conditions	13.1.2
Test Numbering System	9.5
Intake and Exhaust CO2 Measurement	8.3.6
Operating Conditions	10.8.4
Scope	1
Rocker Cover and Oil Pan	8.1.4
Injector Adjusting Screw Cleaning and Measurement	8.1.9
Test Fuel	7.2
Operational Measurements	8.3
Last Start Date	9.8
Fuel Samples	10.4
Test Procedure	10
Engine Build Committed	10.3.3
Pressurized Oil Fill System	6.2.8
Determination of Operational Validity	Annex A12
Electronic transmission of Test Results	12.2.1
Oil Sampling	10.8.9
Test Engine	6.1.1
Oil Fill for Test	10.8.2
Intermediate Precision Conditions	13.1.1
Reference Oil Test	12.2
Power Supply Voltage	6.1.10
Shutdown and Maintenance	10.7
Engine Disassembly	10.9.3
External Oil System	8.1.5
Crosshead Mass Loss	11.1
Oil Pan Modification	6.1.4
Pressures	8.3.4
Test Engine Configuration	6.1
Oil Analyses	11.6
Donated Reference Oil Test Programs	9.9
Additional Analysis	11.8.1
Rod Bearing Cleaning and Measurement	8.1.7
New Parts	8.2.7
Specified Units and Formats	Annex A8
Build-Up Oil	8.2.3
Engine Mounting	6.2.1
Fuel Analyses	11.8
Stand Calibration Period	9.3
Engine Build Parts Kit	Annex A3
Pentane	7.4
ISM Merit Rating Calculation	Annex A14
Referenced Documents	2
Stand Modification and Calibration Status	9.4
Sludge Ratings	11.4
Barometric Pressure Sensor	6.1.8
200-h Test Procedure	10.8
Appendix
Injector Adjusting Screw Correction Factor	11.2.5
Cummins Service Publications	Annex A7
Coolant Thermostat	8.2.4
Operational Data Acquisition	10.8.8
General	9.1
New Test Stand	9.2
Reference Oil Test Acceptance	9.6
Safety Precautions	Annex A1
End of Test (EOT)	10.9
Cylinder Head	8.1.3
Test Timer	10.8.7
Flow Rates	8.3.5
Exhaust Gas Recirculation System	6.2.5
Engine Break-in	10.6
	Section
Reference Oil Accountability	9.7
Instrumentation Calibration	8.3.2
Summary of Test Method	4
Intake Air System	6.2.2
Bias	13.2
Report Forms and Data Dictionary	Annex A9
Oil Fill for Break-in	10.3
Procedural Deviations	9.10.1
Oil Addition	10.8.10
Engine Block Preparation	6.1.12
Engine and Cleaning Fluids	7
Aftercooler	6.2.3
Intake Manifold Temperature Sensor	6.1.7
Engine/Stand Calibration and Non-Reference Oil Tests	9
Adjustments to Reference Oil Calibration Periods	9.10
Test Oil	7.1
Engine Control Module (ECM)	6.1.5
Units and Formats	8.3.1
Crankcase Aspiration	6.2.10
Reference Oil Tests	9.5.2
Mass % Soot Validity	10.8.6
System Time Responses	6.3
Turbocharger Controller	6.1.9
Engine Block	8.1.2
Parts and Fuel Shortages	9.10.2
Intake Air Aftercooler	Annex A2
Mass Balance	6.5
Air Compressor and Fuel Pump	6.1.11
Sludge Rating Worksheets	Annex A10
Engine Warm-up	10.5
Crosshead Cleaning and Measurement	8.1.6
Preparation of Apparatus	8
Terminology	3
Non-Reference Oil Tests	9.5.3
Injector Adjusting Screw Mass Loss	11.2
New Test Stand Calibration	9.2.1
Injection Timing Change	10.8.5
Fuel Injectors	8.2.6
Engine Assembly	8.2
Maintenance	10.7.3
Coolant System	6.2.7
Oil Sample Containers	6.4
Precision and Bias	13
Report Forms	12.1
Engine Position Sensor	6.1.6
Fuel Specification	Annex A6

Published By	Publication Date	Number of Pages
ASTM	2014	50


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ASTM-D7468 2014(Redline)

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ASTM-D7468 2014