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  • ASTM
    D6923-23 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine—Caterpillar 1R Test Procedure
    Edition: 2023
    $131.04
    Unlimited Users per year

Description of ASTM-D6923 2023

ASTM D6923-23

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




ASTM D6923

Scope

1.1 This test method covers stressing an engine oil under modern high-speed diesel operating conditions and measures the oil's deposit control, lubrication ability, and resistance to oil consumption. It is performed in a laboratory using a standardized high-speed, single-cylinder diesel engine.3

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, and tubing size, or where a sole source supplier is specified.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Being an engine test method, this test method does have definite hazards that require safe practices (see Appendix X2 on Safety).

1.4 The following is the Table of Contents:

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

 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 Component

9.3

 Engine Lubricant System Flush

9.4

 Engine Piston Cooling Jet

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

 Fuel Injectors

10.4

 Air Flow

10.5

 Intake Air Barrel

10.6

 Fuel Filter

10.7

 Oil Scale Flow Rates

10.8

 Test Stand Calibration

10.9

  Re-calibration Requirements

10.9.1

  Extending Test Stand Calibration Period

10.9.2

 Test Run Numbering

10.10

 Humidity Calibration Requirements

10.11

 Calibration of Piston Deposit Raters

10.12

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

  Ring Gap End Increase

11.7.3

  Cylinder Liner Wear

11.7.4

  Cylinder Liner Bore Polish

11.7.5

  Photographs

11.7.6

Calculation and Interpretation of Results

12

 Test Validity

12.1

 Calculations

12.4

  Quality Index

12.4.1

  Oil Consumption

12.4.2

Report

13

 Forms and Data Dictionary

13.1

 Test Validity

13.2

 Report Specifics

13.3

Precision and Bias

14

 Precision

14.1

 Bias

14.2

Keywords

9.11.1

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

Additional Report Forms

Annex A7

Engine Assembly and Inspection Information

Annex A8

Flushing Instructions and Apparatus

Annex A9

Warm-up, Cool-down and Testing Conditions

Annex A10

Piston and Liner Rating Modifications

Annex A11

Return Goods Authorization Claim Form

Annex A12

Appendixes

 

Various Examples of Supplemental Information for Reference Purposes

Appendix X1

Safety

Appendix X2

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


Keywords

Caterpillar 1R test procedure; oil consumption; piston deposits; single cylinder diesel oil test;


ICS Code

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


DOI: 10.1520/D6923-23

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