ASTM D5579 - 14

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

    Active Standard ASTM D5579 | Developed by Subcommittee: D02.B0.03

    Book of Standards Volume: 05.02


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    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.

    1. 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).2 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 and health 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 A1

    HTCT Test Report Forms and Data Dictionary

    Annex A2

    Manual Transmission Cyclic Durability Test Parts Inspection and Wear Measurements

    Annex A3



    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)

    D7422 Test Method for Evaluation of Diesel Engine Oils in T-12 Exhaust Gas Recirculation Diesel Engine

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    SAE Standard

    SAEJ308 Axle and Manual Transmission Lubricants Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001.

    Military Standard

    MIL-L-2105 Lubricating Oil, Gear, Multipurpose Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.

    Other Standard

    GO-H Mack Trucks Oil,Gear: Multi-Purpose Available from Volvo Powertrain, North America, 13302 Pennsylvania Ave., Hagerstown, MD 21742.


    ICS Code

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

    UNSPSC Code

    UNSPSC Code 15121503(Gear oil)


    DOI: 10.1520/D5579-14

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