ASTM D5579-12
Historical Standard: ASTM D5579-12 Standard Test Method for Evaluating the Thermal Stability of Manual Transmission Lubricants in a Cyclic Durability Test
SUPERSEDED (see Active link, below)
ASTM D5579
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). 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 | 14 |
| Precision and Bias | 15 |
| Keywords | 16 |
| 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.Keywords
cyclic transmission test; forkwear; manual transmission lubricants; shifting synchronization; shift time; thermal stability; total cycle time;
ICS Code
ICS Number Code 75.100 (Lubricants, industrial oils and related products)
DOI: 10.1520/D5579-12
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