ASTM D5579-2016 Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test《用于评估循环耐久性试验中手动变速器润滑油热稳定性的标准试验方法》.pdf
《ASTM D5579-2016 Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test《用于评估循环耐久性试验中手动变速器润滑油热稳定性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D5579-2016 Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test《用于评估循环耐久性试验中手动变速器润滑油热稳定性的标准试验方法》.pdf(19页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D5579 16Standard Test Method forEvaluating the Thermal Stability of Manual TransmissionLubricants in a Cyclic Durability Test1This standard is issued under the fixed designation D5579; the number immediately following the designation indicates the year oforiginal adoption or, in the cas
2、e of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis test method is written for use by laboratories that use the portions of the test metho
3、d that referto ASTM Test Monitoring Center (TMC) services (see Annex A1 Annex A4). Laboratories thatchoose not to use the TMC services may simply disregard these portions.The TMC provides reference oils, and engineering and statistical services to laboratories that desireto produce test results that
4、 are statistically similar to those produced by laboratories previouslycalibrated by the TMC.In general, the Test Purchaser decides if a calibrated test stand is to be used. Organizations such asthe American Chemistry Council require that a laboratory use the TMC services as part of their testregist
5、ration process. In addition, the American Petroleum Institute and the Gear Lubricant ReviewCommittee of the Lubricant Review Institute (SAE International) require that a laboratory use theTMC services in seeking qualification of oils against their specifications.NOTE 1The advantage of using the TMC
6、services to calibrate test stands is that the test laboratory (and hence theTest Purchaser) has an assurance that the test stand was operating at the proper level of test severity. It should also beborne in mind that results obtained in a non calibrated test stand may not be the same as those obtain
7、ed in a test standparticipating in the ASTM TMC services process.1. Scope*1.1 This test method covers the thermal stability of fluids foruse in heavy duty manual transmissions when operated at hightemperatures.1.2 The lubricant performance is measured by the numberof shifting cycles that can be perf
8、ormed without failure ofsynchronization when the transmission is operated while con-tinuously cycling between high and low range.1.3 Correlation of test results with truck transmission ser-vice has not been established. However, the procedure has beenshown to appropriately separate two transmission
9、lubricants,which have shown satisfactory and unsatisfactory field perfor-mance in the trucks of one manufacturer.1.4 Changes in this test method may be necessary due torefinements in the procedure, obsolescence of parts, orreagents, and so forth. These changes will be incorporated byInformation Lett
10、ers issued by the ASTM Test MonitoringCenter (TMC).2The test method will be revised to show thecontent of all the letters, as issued.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for
11、information onlyand are not considered standard.1.5.1 ExceptionWhen materials, products, or equipmentare available only in inch-pound units, SI units are omitted.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the u
12、ser of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.7 This test method is arranged as follows:1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lub
13、ricants and is the direct responsibility ofSubcommittee D02.B0.03 on Automotive Gear Lubricants or whenshifting from low range to high range, for the countershaftspeed to decrease from 1700 r min to 500 r min.3.2.6 synchronizer, na pack of friction and reaction platesused to match the speeds of the
14、low- and high-range gears priorto engagement.3.2.7 unsynchronized shift, na shift in which the speed ofthe mating gears is not matched to the speed of the transmis-sion output shaft by the synchronizer.4. Summary of Test Method4.1 Prior to each test run, the transmission is disassembledand all parts
15、, including the case and the oil-circulating andheating systems, are thoroughly cleaned. The transmission isrebuilt with a new synchronizer assembly, including measuredshifter fork, friction, and reaction disks. All other worn ordefective parts are replaced.4.2 The rebuilt transmission is installed
16、on a test stand.4.3 The transmission and oil system are flushed with the testoil in accordance with the flush procedure.4.4 The flush oil is drained, and the test oil is measured andcharged to the transmission.4.5 The transmission is started and operated in low rangeuntil the oil temperature reaches
17、 the test operating range.4.6 The transmission is automatically cycled between lowand high range until two unsynchronized shifts occur or thedesired length of test is reached without failure. The timerequired to shift from high range to low range is recorded eachhour.4.7 At the conclusion of the tes
18、t, the test parts are removedand visually inspected. The shifter fork and friction plates aremeasured again to determine wear.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information,
19、 refer to the standards Document Summary page onthe ASTM website.4Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,PA 15096, http:/www.sae.org.5Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.6Avail
20、able from Volvo Powertrain, North America, 13302 Pennsylvania Ave.,Hagerstown, MD 21742.D5579 1625. Significance and Use5.1 This test method is used to evaluate automotive manualtransmission fluids for thermal instability, which results indeterioration of synchronizer performance.5.2 This test metho
21、d may also be utilized in other specifi-cations and classifications of transmission and gear lubricantssuch 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 ManualTransmission Lubricants, and5.2.4 Mack Truck GO-
22、H Gear Lubricant Specification.6. Apparatus6.1 Table 1 is a list of the make and model of recommendedinstruments and equipment.6.2 Test TransmissionThe test transmission is a MACKT2180, configuration 11KBA51431 (see Fig. 1). Some parts inthe transmission are to be removed and some are to be addedbef
23、ore testing, as listed in Table 2. The main box shift railcover can be replaced with an aluminum plate to facilitatetransmission cleaning at end of test.6.3 Transmission MountsThe transmission is mounted asshown in Fig. 2.6.4 Oil-Circulating SystemThe system heats the oil to thespecified operating t
24、emperature of 250 F 6 5 F (121 C 62.7 C) and maintains this temperature throughout the durationof the test. The power density of the heater is not high enoughto cause degradation of the oil (22 W/in.2to 25 W/in.2(3.4 W cm2to 3.9 W cm2). The oil flow rate is between6 gal min and 10 gal/min (23 L min
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