Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test

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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. 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 and health practices and determine the applicability of regulatory limitations prior to use.
1.7 This test method is arranged as follows:
SectionScope1 Referenced Documents2 Terminology3 Summary of Test Method4 Significance and Use5 Apparatus6 Test Transmission6.2 Transmission Mounts6.3 Oil-Circulating System6.4 Oil Return Hole6.5 Air Pressure Controls6.6 Drive System6.7 Instrumentation6.8 Thermocouple Placement6.9Reagents and Materials7 Safety8 Preparation of Apparatus9Cleaning of Parts9.1Assembly9.2 Calibration10 Transmission and Test Stand Calibration10.1 Reference Oils10.2 Reference Oil Test Frequency10.3 Instrumentation Calibration10.4Shift Time Calibration10.5 Operating Procedure11 System Flush and Charge11.1 Test Operation11.2 Shut-Down Procedure11.3 Transmission Disassembly11.4 Determination of Test Results12 Failure Criteria12.1 Shifter Fork Wear12.2Test Validity Determination12.3 Report13 Precision and Bias14 Keywords15 Test Validity Calculations and LimitsAnnex A1Test Kit PartsAnnex A2Report FormsAnnex A3Data DictionaryAnnex A4Manual Transmission Cyclic Durability Test Parts Inspection and Wear MeasurementsAnnex A5

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09-May-2003
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ASTM D5579-03 - Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: D 5579 – 03
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 D 5579; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope
Transmission Mounts 6.3
Oil-Circulating System 6.4
1.1 This test method covers the thermal stability of fluids for
Oil Return Hole 6.5
use in heavy duty manual transmissions when operated at high
Air Pressure Controls 6.6
Drive System 6.7
temperatures.
Instrumentation 6.8
1.2 The lubricant performance is measured by the number
Thermocouple Placement 6.9
of shifting cycles that can be performed without failure of
Reagents and Materials 7
Safety 8
synchronization when the transmission is operated while con-
Preparation of Apparatus 9
tinuously cycling between high and low range.
Cleaning of Parts 9.1
1.3 Correlation of test results with truck transmission ser- Assembly 9.2
Calibration 10
vice has not been established. However, the procedure has been
Transmission and Test Stand Calibration 10.1
shown to appropriately separate two transmission lubricants,
Reference Oils 10.2
which have shown satisfactory and unsatisfactory field perfor- Reference Oil Test Frequency 10.3
Instrumentation Calibration 10.4
mance in the trucks of one manufacturer.
Shift Time Calibration 10.5
1.4 Changes in this test method may be necessary due to
Operating Procedure 11
refinements in the procedure, obsolescence of parts, or re- System Flush and Charge 11.1
Test Operation 11.2
agents, and so forth. These changes will be incorporated by
Shut-Down Procedure 11.3
Information Letters issued by the ASTM Test Monitoring
Transmission Disassembly 11.4
2
Center (TMC). The test method will be revised to show the Determination of Test Results 12
Failure Criteria 12.1
content of all the letters, as issued.
Shifter Fork Wear 12.2
1.5 The values stated in inch-pound units are to be regarded
Test Validity Determination 12.3
as standard. When materials, products, or equipment are Report 13
Precision and Bias 14
available only in inch-pound units, SI units are omitted.
Keywords 15
1.6 This standard does not purport to address all of the
Test Validity Calculations and Limits Annex A1
Test Kit Parts Annex A2
safety concerns, if any, associated with its use. It is the
Report Forms Annex A3
responsibility of the user of this standard to establish appro-
Data Dictionary Annex A4
priate safety and health practices and determine the applica-
Manual Transmission Cyclic Durability Test Parts Annex A5
bility of regulatory limitations prior to use. Inspection and Wear Measurements
1.7 This test method is arranged as follows:
2. Referenced Documents
Section
2.1 ASTM Standards:
Scope 1
Referenced Documents 2
D 235 Specification for Mineral Spirits (Petroleum Spirits)
Terminology 3
3
(Hydrocarbon Dry Cleaning Solvent)
Summary of Test Method 4
2.2 SAE Standard:
Significance and Use 5
4
Apparatus 6
SAE J308 Axle and Manual Transmission Lubricants
Test Transmission 6.2
2.3 Military Standard:
5
MIL-L-2105 Lubricating Oil, Gear, Multipurpose
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
3
D02.B0 on Automotive Lubricants. Annual Book of ASTM Standards, Vol 06.04.
4
Current edition approved May 10, 2003. Published June 2003. Originally Available from Society of Automotive Engineers (SAE), 400 Commonwealth
approved in 1994. Last previous edition approved in 2001 as D 5579-01. Dr., Warrendale, PA 15096-0001.
2 5
ASTM Test Monitoring Center, 6555 Penn Ave., Pittsburgh, PA 15206-4489. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
This edition incorporates revisions in all Information Letters through No. 02-1. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D5579–03
2.4 Other Standard: 5. Significance and Use
6
GO-H Mack Trucks Oil,Gear: Multi-Purpose
5.1 This test method is used to evaluate automotive manual
transmission fluids for thermal instability, which results in
3. Terminology
deterioration of synchronizer performance.
5.2 This test method may also be utilized in other specifi-
3.1 Definitions:
cations and classifications of transmission and gear lubricants
3.1.1 wear—the loss of material from two or more surfaces
such as the following:
in relative motion.
5.2.1 (final
...

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