ASTM-D6681:2001 Edition

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D6681-01 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure

Published By	Publication Date	Number of Pages
ASTM	2001	96

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Category: ASTM

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Description

1.1 This test method is required to evaluate the performance of engine oils intended to satisfy certain American Petroleum Institute (API) C service categories (included in Specification D 4485). It is performed in a laboratory using a standardized high-speed, single-cylinder diesel engine. Piston and ring groove deposit-forming tendency and oil consumption is measured. The piston, the rings, and the liner are also examined for distress and the rings for mobility.

1.2 The values stated in SI units are to be regarded as the standard.

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. Being an engine test method, this standard does have definite hazards that require safe practices (see Appendix X2 on Safety).

1.3 The following is the Table of Contents:

Additional information

Oil Heating System	6.2.5.1
Compression Ratio	9.12
Piston and Liner Rating Modifications	Annex A13
Instrumentation Standards	10.2
Calibration of Piston Deposit Raters	10.14
Cool-down Procedure	11.2
Complete Engine Inspection	9.2
Engine Break-in Procedure	11.1
Humidity Calibration Requirements	10.13
Procedure	11
Piston Ring Side Clearances	11.7.1
Oil System	Annex A6
Significance and Use	5
Fuel System Design and Required Components	Annex A5
Exhaust and Intake Barrel Piping	Annex A7
Apparatus and Installation	6
Oil Sample Valve	6.2.5.2
Engine Fuel System	11.6.2
Intake Air	11.6.5
Air Flow	10.6
Engine Measurements and Inspections	9.6
Test Run Numbering	10.12
Engine Coolant System Cleaning Procedure	9.14
Photographs	11.7.6
Engine Piston Cooling Jets	9.5
Fuel Injector	9.9
Scope	1
Various Examples for Reference Purposes	Appendix X1
Report Specifics	13.3
Additional Report Forms	Annex A14
Report	13
Ring End Gap Increase	11.7.3
Test Cell Instrumentation	10.1
Safety	Appendix X2
Referee Ratings	11.7.2.1
Re-calibration Requirements	10.4
Fuel System	6.2.3
Exhaust Pressure	11.6.4
Extending Test Stand Calibration Period	10.11
Warm-up, Cool-down and Testing Conditions	Annex A12
Engine Assembly Information	Annex A10
Test Validity	13.2
Periodic Measurements	11.5
Engine Timing	9.13
Bias	14.2
Keywords	15
Reagents and Materials	7
Exhaust System	6.2.2
Cylinder Head	9.7
Humidity Probe Installation (Location)	Annex A8
Precision	14.1
Piston and Rings	9.10
Intake Air Mass Flow Sensor Installation	Annex A4
General Engine Assembly Practices	9.1
Engine Instrumentation	6.2.7
Referenced Documents	2
Test Report Data Dictionary	Annex A16
Engine Coolant	11.6.1
Intake Air Barrel	10.7
Oil Scale Flow Rates	10.9
Piston Ratings	11.7.2
Warm-up Procedure	11.3
Test Report Forms	Annex A15
Engine Control Systems	11.6
Summary of Test Method	4
Intake Air System	6.2.1
Calibration of Test Stands	10.10
Oil Consumption	12.2.2
Valve Guide Bushings	9.8
Shutdowns and Lost Time	11.4
	Section
Cylinder Liner Bore Polish	11.7.5
Fuel Injectors	10.5
Coolant Flow	10.3
Cooling System Arrangement	Annex A3
Post-Test Procedures	11.7
Fuel Filter	10.8
Cylinder Liner	9.11
Instrument Locations, Measurements, and Calculations	Annex A2
Oil Samples	8
Engine and Parts Warranty	Annex A1
Return Goods Authorization (Claim Form)	Annex A9
Precision and Bias	14
Engine Oil Temperature	11.6.3
Calculations	12.2
Flushing Instructions and Apparatus	Annex A11
Copper Components	9.3
Calibration and Standardization	10
Forms and Data Dictionary	13.1
Cylinder Liner Wear	11.7.4
Engine Oil System	6.2.5
Engine Coolant System	6.2.6
Terminology	3
Preparation of Apparatus	9
Oil Consumption System	6.2.4
Engine Lubricant System Flush	9.4
Quality Index	12.2.1
Calculation and Interpretation of Results	12

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ASTM-D6681:2001 Edition

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