ASTM D5579-19e1
(Test Method)Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test
Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test
SIGNIFICANCE AND USE
5.1 This test method is used to evaluate automotive manual transmission fluids for thermal instability, which results in deterioration of synchronizer performance.
5.2 This test method may also be utilized in other specifications and classifications of transmission and gear lubricants such as the following:
5.2.1 (final API designation of PG-1),
5.2.2 Military Specification MIL-L-2105,
5.2.3 SAE Information Report J308 Axle and Manual Transmission Lubricants, and
5.2.4 Mack Truck GO-H Gear Lubricant Specification.
SCOPE
1.1 This test method covers the thermal stability of fluids for use in heavy duty manual transmissions when operated at high temperatures.
1.2 The lubricant performance is measured by the number of shifting cycles that can be performed without failure of synchronization when the transmission is operated while continuously cycling between high and low range.
1.3 Correlation of test results with truck transmission service has not been established. However, the procedure has been shown to appropriately separate two transmission lubricants, which have shown satisfactory and unsatisfactory field performance in the trucks of one manufacturer.
1.4 Changes in this test method may be necessary due to refinements in the procedure, obsolescence of parts, or reagents, and so forth. These changes will be incorporated by Information Letters issued by the ASTM Test Monitoring Center (TMC). The test method will be revised to show the content of all the letters, as issued.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5.1 Exception—When materials, products, or equipment are available only in inch-pound units, SI units are omitted.
1.6 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.
1.7 This test method is arranged as follows:
Section
Scope
1
Referenced Documents
2
Terminology
3
Summary of Test Method
4
Significance and Use
5
Apparatus
6
Test Transmission
6.2
Transmission Mounts
6.3
Oil-Circulating System
6.4
Oil Return Hole
6.5
Air Pressure Controls
6.6
Drive System
6.7
Instrumentation
6.8
Thermocouple Placement
6.9
Reagents and Materials
7
Safety
8
Preparation of Apparatus
9
Cleaning of Parts
9.1
Assembly
9.2
Calibration
10
Transmission and Test Stand Calibration
10.1
Reference Oils
10.2
Reference Oil Test Frequency
10.3
Instrumentation Calibration
10.4
Shift Time Calibration
10.5
Operating Procedure
11
System Flush and Charge
11.1
Test Operation
11.2
Shut-Down Procedure
11.3
Transmission Disassembly
11.4
Determination of Test Results
12
Failure Criteria
12.1
Shifter Fork Wear
12.2
Test Validity Determination
12.3
Report
13
Precision and Bias
14
Keywords
15
Test Validity Calculations and Limits
Annex A5
HTCT Test Report Forms and Data Dictionary
Annex A6
Manual Transmission Cyclic Durability Test Parts Inspection and Wear Measurements
Annex A7
1.8 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.
General Information
Relations
Standards Content (Sample)
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.
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Designation: D5579 − 19
Standard Test Method for
Evaluating the Thermal Stability of Manual Transmission
1
Lubricants in a Cyclic Durability Test
This standard is issued under the fixed designation D5579; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Editorially updated TMC governance information in June 2022.
INTRODUCTION
Portions of this test method are written for use by laboratories that make use of ASTM Test
2,3
Monitoring Center (TMC) services (see Annex A1 – Annex A4).
TheTMC provides reference oils, and engineering and statistical services to laboratories that desire
to produce test results that are statistically similar to those produced by laboratories previously
calibrated by the TMC.
In general, the test purchaser decides if a calibrated test stand is to be used. Organizations such as
theAmerican Chemistry Council require that a laboratory utilize theTMC services as part of their test
registration process. In addition, the American Petroleum Institute and the Gear Lubricant Review
Committee of the Lubricant Review Institute (SAE International) require that a laboratory use the
TMC services in seeking qualification of oils against their specifications.
The advantage of using the TMC services to calibrate test stands is that the test laboratory (and
hence the test purchaser) has an assurance that the test stand was operating at the proper level of test
severity. It should also be borne in mind that results obtained in a non-calibrated test stand may not
be the same as those obtained in a test stand participating in the ASTM TMC services process.
ASTM International policy is to encourage the development of test procedures based on generic
equipment. It is recognized that there are occasions where critical/sole-source equipment has been
approved by the technical committee (surveillance panel/task force) and is required by the test
procedure. The technical committee that oversees the test procedure is encouraged to clearly identify
if the part is considered critical in the test procedure. If a part is deemed to be critical, ASTM
encourages alternative suppliers to be given the opportunity for consideration of supplying the critical
part/component providing they meet the approval process set forth by the technical committee.
An alternative supplier can start the process by initiating contact with the technical committee
(current chairs shown on ASTM TMC website). The supplier should advise on the details of the part
that is intended to be supplied. The technical committee will review the request and determine
feasibility of an alternative supplier for the requested replacement critical part. In the event that a
replacement critical part has been identified and proven equivalent the sole-source supplier footnote
shall be removed from the test procedure.
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This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.B0.03 on Automotive Gear Lubricants & Fluids.
3
Current edition approved May 1, 2019. Published June 2019. Originally Until the next revision of this test method, the ASTM Test Monitoring Center
approved in 1994. Last previous edition approved in 2016 as D5579 – 16. DOI: will update changes in the test method by means of information letters. Information
10.1520/D5579-19E01. letters may be obtained from the ASTM Test Monitoring Center, 203 Armstrong
2
ASTM Test Monitoring Center, 203 Armstrong Drive, Freeport, PA 16229, Drive, Freeport, PA 16229, http://www.astmtmc.org. Attention: Director. This
http://www.astmtmc.org. edition incorporates revisions in all information Letters through 18-1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D5579 − 19
1. Scope*
Section
Shifter Fork Wear 12.2
1.1 Thistestmethodcoversthethermalstabilityoffluidsfor
Test Validity Determination 12.3
Report 13
use in heavy duty manual transmissions when operated at high
Precision and Bias 14
temperatures.
Keywords 15
Test Validity Calculations and Limits Annex A5
1.2 The lubricant performance is measured by the number
HTCT Test Report Forms and Data Dictionary Annex A6
of shifting cycles that can be performed without failure of
Manual Transmission Cyclic Durability Test Parts Annex A7
Inspection and Wear Measur
...
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