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.

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30-Apr-2004
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ASTM D5579-04 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 – 04
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
Oil-Circulating System 6.4
Oil Return Hole 6.5
1.1 Thistestmethodcoversthethermalstabilityoffluidsfor
Air Pressure Controls 6.6
use in heavy duty manual transmissions when operated at high
Drive System 6.7
Instrumentation 6.8
temperatures.
Thermocouple Placement 6.9
1.2 The lubricant performance is measured by the number
Reagents and Materials 7
of shifting cycles that can be performed without failure of
Safety 8
Preparation of Apparatus 9
synchronization when the transmission is operated while con-
Cleaning of Parts 9.1
tinuously cycling between high and low range.
Assembly 9.2
1.3 Correlation of test results with truck transmission ser- Calibration 10
Transmission and Test Stand Calibration 10.1
vicehasnotbeenestablished.However,theprocedurehasbeen
Reference Oils 10.2
shown to appropriately separate two transmission lubricants,
Reference Oil Test Frequency 10.3
which have shown satisfactory and unsatisfactory field perfor- Instrumentation Calibration 10.4
Shift Time Calibration 10.5
mance in the trucks of one manufacturer.
Operating Procedure 11
1.4 Changes in this test method may be necessary due to
System Flush and Charge 11.1
refinements in the procedure, obsolescence of parts, or re- Test Operation 11.2
Shut-Down Procedure 11.3
agents, and so forth. These changes will be incorporated by
Transmission Disassembly 11.4
Information Letters issued by the ASTM Test Monitoring
Determination of Test Results 12
2
Center (TMC). The test method will be revised to show the Failure Criteria 12.1
Shifter Fork Wear 12.2
content of all the letters, as issued.
Test Validity Determination 12.3
1.5 The values stated in inch-pound units are to be regarded
Report 13
Precision and Bias 14
as standard. When materials, products, or equipment are
Keywords 15
available only in inch-pound units, SI units are omitted.
Test Validity Calculations and Limits Annex A1
1.6 This standard does not purport to address all of the
Test Kit Parts Annex A2
HTCT Test Report Forms and Data Dictionary Annex A3
safety concerns, if any, associated with its use. It is the
Manual Transmission Cyclic Durability Test Parts Annex A4
responsibility of the user of this standard to establish appro-
Inspection and Wear Measurements
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 2. Referenced Documents
3
1.7 This test method is arranged as follows:
2.1 ASTM Standards:
Section
D 235 Specification for Mineral Spirits (Petroleum Spirits)
Scope 1
(Hydrocarbon Dry Cleaning Solvent)
Referenced Documents 2
2.2 SAE Standard:
Terminology 3
4
Summary of Test Method 4
SAE J308 Axle and Manual Transmission Lubricants
Significance and Use 5
2.3 Military Standard:
Apparatus 6
5
MIL-L-2105 Lubricating Oil, Gear, Multipurpose
Test Transmission 6.2
Transmission Mounts 6.3
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This test method is under the jurisdiction of ASTM Committee D02 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee Standards volume information, refer to the standard’s Document Summary page on
D02.B0 on Automotive Lubricants. the ASTM website.
4
Current edition approved May 1, 2004. Published June 2004. Originally Available from Society of Automotive Engineers (SAE), 400 Commonwealth
approved in 1994. Last previous edition approved in 2003 as D 5579 – 03. 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. 03-1. 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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D5579–04
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.
...

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