Active Standard ASTM D7603 | Developed by Subcommittee: D02.B0.01
Book of Standards Volume: 05.04
Historical (view previous versions of standard)
Significance and Use
5.2 In addition, because different oils are often mixed when topping off, gear oils from different manufacturers, or containing different base fluids or performance-enhancing additives should be completely miscible and compatible with each other. Any incompatibility of such mixtures can also result in equipment failure if gelation or additive dropout occurs.
5.4 This test method is based on the separate test methods FED-STD-791/3440.1 and FED-STD-791/3440.2. Minor changes have been made to the FED test methods to provide a coherent unified procedure. These changes do not significantly alter the test procedures. This test method has, therefore, potential for use as an alternative to the FED test methods in gear oil specifications such as SAE J2360 and Specification D5760.
1.1 This test method covers the determination of storage stability characteristics and the compatibility of automotive gear lubricants when blended with reference lubricants. The purpose of the test is to determine if performance-enhancing additives separate out under defined conditions.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
D1193 Specification for Reagent Water
D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants
D5760 Specification for Performance of Manual Transmission Gear Lubricants
E542 Practice for Calibration of Laboratory Volumetric Apparatus
E1272 Specification for Laboratory Glass Graduated Cylinders
SAE StandardsJ2360 Lubricating Oil, Gear Multipurpose (Metric) Military Use
Federal Test Method StandardFED-STD-791/3440.2 Compatibility Characteristics of Universal Gear Lubricants
ICS Number Code 75.100 (Lubricants, industrial oils and related products)