1、Designation: D5760 09D5760 13Standard Specification forPerformance of Manual Transmission Gear Lubricants1This standard is issued under the fixed designation D5760; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope Scope*1.1 This specification lists the test methods and acceptance criteria for determining the acceptability of lubricants use
3、d innonsynchronized heavy duty manual transmissions.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.2. Referenced Documents2.1 ASTM Standards:2D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper
4、Strip TestD892 Test Method for Foaming Characteristics of Lubricating OilsD5182 Test Method for Evaluating the Scuffing Load Capacity of Oils (FZG Visual Method)D5579 Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability TestD5662 Test Method for D
5、etermining Automotive Gear Oil Compatibility with Typical Oil Seal ElastomersD5704 Test Method for Evaluation of the Thermal and Oxidative Stability of Lubricating Oils Used for Manual Transmissionsand Final Drive Axles2.2 Federal Standards:3Federal Standard No. 791C, Method 3430.2 Compatibility Cha
6、racteristics of Universal Gear LubricantsFederal Standard No. 791C, Method 3440.1 Storage Solubility Characteristics of Universal Gear Lubricants2.3 SAE Publications:4SAE J2360 Lubricating Oil, Gear Multipurpose (Metric) Military Use3. Terminology3.1 Definitions of Terms Specific to This Standard:3.
7、1.1 nonsynchronized transmission, na transmission having no means for synchronizing the speeds of engaging elements.Typical heavy-duty manual transmissions have no such means for gear engagement by the shift lever, but may have such meansfor pneumatic engagement of auxiliary range gears.3.1.2 oil se
8、al compatibility, nin lubricants for lubricating manual transmissions and final drive axles, prevention of chemicalor thermal degradation of seal elastomers typically observed as hardening, cracking, or excessive swelling in a manner whichwould result in oil leakage.3.1.3 thermal oxidation, nin lubr
9、icants used for lubricating manual transmissions and final drive axles, deterioration of thelubricant under high-temperature conditions which is observed as viscosity increase of the lubricant, insolubles formation in thelubricant, deposit formation on the parts, or a combination thereof.4. Performa
10、nce Classification4.1 API Category MT-1The designation API Category MT-1 identifies the category of lubricants intended for use innonsynchronized manual transmissions, apart from API Service Category GL-4. See Appendix X1 for background information onthis category.1 This specification is under the j
11、urisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.B0.03on Automotive Gear Lubricants cyclic durability; manual transmissions; oil seal; thermal oxidation; thermal stabilityAPPENDIX(Nonmandatory Information)X1. API CATEGORY MT-
12、1 RATIONALEX1.1 In 1986, Eaton Corporation, through the Society forAutomotive Engineers (SAE), outlined the trucking industrysindustrysneed for a gear lubricant category whichthat would provide performance characteristics essential to ensure optimum service lifefor heavy-duty manual transmissions. T
13、his request was supported by all major North American commercial transmission builders.X1.2 During the same period user surveys indicated that the class of oils typically used in manual transmissions was not alwaysin compliance with the builders primary recommendations. API GL-5 gear oils or multigr
14、ade engine oils were the popular choiceof users due to their desire to inventory and use two shop oils, engine and gear. Some of these oils were found to performsatisfactorily while others presented problems. In extreme cases, some API GL-5 oils were reported to cause oil seal failures dueto coking/
15、hard deposits or severe oil sludging at mileages below realistic drain intervals, or both.X1.3 Using feedback from equipment builders, SAE outlined several lubricant performance characteristics whichthat theybelieved were vital to ensure that their goals for optimum transmission service life would b
16、e met. These characteristics includedthe following:(1) Fluid thermal stability/component cleanliness,( 2) Oil seal compatibility, and(3) Brass (copper) component compatibility.X1.4 ASTM was then requested to identify or develop tests suitable to assess the preceding performance characteristics. In t
17、heprocess, the proposed categorys performance test matrix was expanded to include properties in addition to those originally definedin order to ensure that a performance balanced lubricant would be provided to users. The added properties included antiwear, foamcontrol, and lubricant compatibility. A
18、 full-scale transmission test was also included to reaffirm the high-temperature lubricantperformance capabilities of API Category MT-1. This test correlates with field service and also ensures satisfactory performancewith plate-type synchronizers.X1.5 The tests and acceptance criteria defined by th
19、is specification are the result of specification and test method developmentwork withinASTM. The introduction of this new category will allow OEMs to specify gear oils for manual transmissions that canbe made available either as dedicated fluids (API Category MT-1) or multipurpose fluids (that is, A
20、PI GL-5/API Category MT-1).Oils meeting the API Category MT-1 performance definition will satisfy OEM objectives for optimum transmission performanceand service life. This has been achieved by combining in a single lubricant the cleanliness and oil seal life typical of engine oilswith the load carry
21、ing characteristics of gear oils.SUMMARY OF CHANGESSubcommittee D02.B0.03 has identified the location of selected changes to this standard since the last issue(D5760 09) that may impact the use of this standard.(1) Only editorial changes were made, applying Form and Style (including SI 10) guideline
22、s.D5760 133ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such
23、rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for addition
24、al standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the AS
25、TM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D5760 134
