ASTM-D6681:2014 Edition

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D6681-14 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	2014	57

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Category: ASTM

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Description

ASTM D6681-14

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

ASTM D6681

Scope

1.1 This test method covers and is required to evaluate the performance of engine oils intended to satisfy certain American Petroleum Institute (API) C service categories (included in Specification D4485). It is performed in a laboratory using a standardized high-speed, single-cylinder diesel engine.⁴ 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 standard. No other units of measurement are included in this standard.

1.2.1 Exceptions—Where there is no direct SI equivalent such as screw threads, National Pipe Threads/diameters, tubing size, or where there is a sole source 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. Being an engine test method, this standard does have definite hazards that require safe practices (see Appendix X2 on Safety).

1.4 The following is the Table of Contents:

Keywords

caterpillar 1P test procedure; oil consumption; piston deposits; single cylinder oil test

ICS Code

ICS Number Code 75.100 (Lubricants, industrial oils and related products)

DOI: 10.1520/D6681-14

Additional information

Piston and Liner Rating Modifications	Annex A13
Air Flow	10.6
Reagents and Materials	7
Piston Ring Side Clearances	11.7.1
Intake Air Barrel	10.7
Oil Scale Flow Rates	10.9
Engine Break-in Procedure	11.1
Ring End Gap Increase	11.7.4
Significance and Use	5
Engine Measurements and Inspections	9.6
Report Specifics	13.3
Oil System	Annex A6
General Engine Assembly Practices	9.1
Keywords	15
Engine Coolant	11.6.1
Procedure	11
Engine Coolant System Cleaning Procedure	9.14
Fuel System Design and Required Components	Annex A5
Exhaust and Intake Barrel Piping	Annex A7
Apparatus and Installation	6
Valve Guide Bushings	9.8
Post-Test Procedures	11.7
Engine Fuel System	11.6.2
Oil Consumption System	6.2.4
Calibration of Piston Deposit Raters	10.15
Extending Test Stand Calibration Period	10.11
Cylinder Head	9.7
Fuel Injectors	10.5
Test Cell Instrumentation	10.1
Engine Control Systems	11.6
Engine Coolant System	6.2.6
Scope	1
Shutdowns and Lost Time	11.4
Various Examples for Reference Purposes	Appendix X1
Referee Ratings	11.7.3
Bias	14.1.4
Warm-up Procedure	11.3
Engine Assembly Information	Annex A10
Additional Report Forms	Annex A14
Report	13
Intake Air System	6.2.1
Safety	Appendix X2
Engine Lubricant System Flush	9.4
Engine Piston Cooling Jets	9.5
Forms and Data Dictionary	13.1
Exhaust System	6.2.2
Warm-up, Cool-down and Testing Conditions	Annex A12
Oil Sample Valve	6.2.5.2
Instrumentation Standards	10.2
Humidity Probe Installation (Location)	Annex A8
Terminology	3
Preparation of Apparatus	9
Copper Components	9.3
Coolant Flow	10.3
Cooling System Arrangement	Annex A3
Photographs	11.7.7
Intake Air Mass Flow Sensor Installation	Annex A4
Referenced Documents	2
Cylinder Liner	9.11
Calibration of Test Stands	10.10
Fuel Injector	9.9
Engine and Parts Warranty	Annex A1
Test Report Forms	Annex A15
Quality Index	12.2.1
Test Run Numbering	10.13
Summary of Test Method	4
Compression Ratio	9.12
Engine Oil Temperature	11.6.3
Engine Oil System	6.2.5
Humidity Calibration Requirements	10.14
	Section
Cylinder Liner Bore Polish	11.7.6
Exhaust Pressure	11.6.4
Cylinder Liner Wear	11.7.5
Cool-down Procedure	11.2
Fuel Filter	10.8
Engine Instrumentation	6.2.7
Fuel System	6.2.3
Oil Consumption	12.2.2
Instrument Locations, Measurements, and Calculations	Annex A2
Periodic Measurements	11.5
Oil Heating System	6.2.5.1
Oil Samples	8
Piston and Rings	9.10
Engine Timing	9.13
Piston Ratings	11.7.2
Return Goods Authorization (Claim Form)	Annex A9
Test Validity	13.2
Precision and Bias	14
Calculations	12.2
Intake Air	11.6.5
Flushing Instructions and Apparatus	Annex A11
Precision	14.1
Calibration and Standardization	10
Re-calibration Requirements	10.4
Complete Engine Inspection	9.2
Calculation and Interpretation of Results	12