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  • ASTM
    D6681-08 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure
    Edition: 2008
    $160.99
    Unlimited Users per year

Description of ASTM-D6681 2008

ASTM D6681-08

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 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 standard. No other units of measurement are included in this 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).

1.4 The following is the Table of Contents:

Section
Scope 1
Referenced Documents 2
Terminology 3
Summary of Test Method 4
Significance and Use 5
Apparatus and Installation 6
Intake Air System 6.2.1
Exhaust System 6.2.2
Fuel System 6.2.3
Oil Consumption System 6.2.4
Engine Oil System 6.2.5
Oil Heating System 6.2.5.1
Oil Sample Valve 6.2.5.2
Engine Coolant System 6.2.6
Engine Instrumentation 6.2.7
Reagents and Materials 7
Oil Samples 8
Preparation of Apparatus 9
General Engine Assembly Practices 9.1
Complete Engine Inspection 9.2
Copper Components 9.3
Engine Lubricant System Flush 9.4
Engine Piston Cooling Jets 9.5
Engine Measurements and Inspections 9.6
Cylinder Head 9.7
Valve Guide Bushings 9.8
Fuel Injector 9.9
Piston and Rings 9.10
Cylinder Liner 9.11
Compression Ratio 9.12
Engine Timing 9.13
Engine Coolant System Cleaning Procedure 9.14
Calibration and Standardization 10
Test Cell Instrumentation 10.1
Instrumentation Standards 10.2
Coolant Flow 10.3
Re-calibration Requirements 10.4
Fuel Injectors 10.5
Air Flow 10.6
Intake Air Barrel 10.7
Fuel Filter 10.8
Oil Scale Flow Rates 10.9
Calibration of Test Stands 10.10
Extending Test Stand Calibration Period 10.11
Test Run Numbering 10.13
Humidity Calibration Requirements 10.14
Calibration of Piston Deposit Raters 10.15
Procedure 11
Engine Break-in Procedure 11.1
Cool-down Procedure 11.2
Warm-up Procedure 11.3
Shutdowns and Lost Time 11.4
Periodic Measurements 11.5
Engine Control Systems 11.6
Engine Coolant 11.6.1
Engine Fuel System 11.6.2
Engine Oil Temperature 11.6.3
Exhaust Pressure 11.6.4
Intake Air 11.6.5
Post-Test Procedures 11.7
Piston Ring Side Clearances 11.7.1
Piston Ratings 11.7.2
Referee Ratings 11.7.3
Ring End Gap Increase 11.7.4
Cylinder Liner Wear 11.7.5
Cylinder Liner Bore Polish 11.7.6
Photographs 11.7.7
Calculation and Interpretation of Results 12
Test Validity 12.1
Calculations 12.2
Quality Index 12.2.1
Oil Consumption 12.2.2
Report 13
Forms and Data Dictionary 13.1
Test Validity 13.2
Report Specifics 13.3
Precision and Bias 14
Precision 14.1
Bias 14.1.4
Keywords 15
Annexes
Engine and Parts Warranty Annex A1
Instrument Locations, Measurements, and Calculations Annex A2
Cooling System Arrangement Annex A3
Intake Air Mass Flow Sensor Installation Annex A4
Fuel System Design and Required Components Annex A5
Oil System Annex A6
Exhaust and Intake Barrel Piping Annex A7
Humidity Probe Installation (Location) Annex A8
Return Goods Authorization (Claim Form) Annex A9
Engine Assembly Information Annex A10
Flushing Instructions and Apparatus Annex A11
Warm-up, Cool-down and Testing Conditions Annex A12
Piston and Liner Rating Modifications Annex A13
Additional Report Forms Annex A14
Test Report Forms Annex A15
Appendixes
Various Examples for Reference Purposes Appendix X1
Safety Appendix X2

Keywords

caterpillar 1P test procedure; oil consumption; piston deposits; single cylinder oil test; Accelerated aging/testing--petroleum products; ASTM Test Monitoring Center (TMC2); Caterpillar 1P test procedure; Oil consumption; Piston deposits; Ring groove deposit-forming tendency; Single-cylinder diesel engine


ICS Code

ICS Number Code


DOI: 10.1520/D6681-08

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ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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