Standard Test Method for Evaluation of Engine Oils for Roller Follower Wear in Light-Duty Diesel Engine
5.1 This test method is used to determine the ability of an engine crankcase oil to control wear that can develop in the field under low to moderate engine speeds and heavy engine torques. Side-by-side comparisons of two or more oils in delivery van fleets were used to demonstrate the field performance of various oils. The specific operating conditions of this test method were developed to provide correlation with the field performance of these oils.
5.2 This test method, along with other test methods, defines the minimum performance level of the Category API CG-4 for heavy duty diesel engine lubricants. Passing limits for this category are included in Specification D4485.
5.3 The design of the engine used in this test method is not representative of all modern diesel engines. Consider this factor, along with the specific operating conditions used to accelerate wear, when extrapolating test results.
1.1 This engine lubricant test method is commonly referred to as the Roller Follower Wear Test. Its primary result, roller follower shaft wear in the hydraulic valve lifter assembly, has been correlated with vehicles used in stop-and-go delivery service prior to 1993. It is one of the test methods required to evaluate lubricants intended to satisfy the API CG-4 performance category. This test has also been referred to as the 6.2 L Test.
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 pipe fittings, thermocouple diameters, and NPT screw threads. Also, roller follower wear is measured in mils.
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.
1.4 Table of Contents:
Summary of Test Method
Significance and Use
Guidelines on Substitution
Preparation of Apparatus
New Engine Preparation
Installation of Auxiliary Systems and Miscellaneous Components
Description of Test Segments and Organization of Test Procedure Sections
Engine Parts Replacement
Engine Starting Procedure
Normal Engine Shutdown Procedure
Emergency Shutdown Procedure
Unscheduled Shutdown and Downtime
New Engine Break-In
Fifty-Hour Steady State Test
Oil Sampling and Oil Addition Procedures
End of Test (EOT) Procedure
Calculation and Interpretation of Test Results
Environment of Parts Measurement Area
Roller Follower Shaft Wear Measurements
Assessment of Test Validity
Final Test Report
Reporting Calibration Test Results
Interim Non-Valid Calibration Test Summary
Precision and Bias
Guidelines for Test Part Substitution or Modification
Guidelines for Units and Specification Formats
Detailed Specifications of Apparatus
Final Report Forms
Kinematic Viscosity at 100°C Procedure for the Roller Follower Wear Test
Enhanced Thermal Gravimetric Analysis (TGA) Procedure for Soot Measurement
Sources of Materials and Information
PC-9 Reference Diesel Fuel Properties
Diagnostic Data Review
Formato físico y digital
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