ASTM D4998 - 13

    Standard Test Method for Evaluating Wear Characteristics of Tractor Hydraulic Fluids

    Active Standard ASTM D4998 | Developed by Subcommittee: D02.B0.03

    Book of Standards Volume: 05.02


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    Significance and Use

    5.1 Many modern tractor designs use the hydraulic fluid to lubricate the transmission and final drive gears. This test method is used to assess the suitability of the tractor hydraulic fluids as lubricants for transmission and final drive gears of tractors.

    1. Scope

    1.1 This test method is used to screen lubricants for gear wear. It is primarily applicable to tractor hydraulic fluids but may be suitable for other applications.

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.3 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. Specific warning information is given in Sections 7 and 9.


    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)

    D323 Test Method for Vapor Pressure of Petroleum Products (Reid Method)

    D329 Specification for Acetone

    D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants


    ICS Code

    ICS Number Code 75.120 (Hydraulic fluids)

    UNSPSC Code

    UNSPSC Code 15121504(Hydraulic oil)


    DOI: 10.1520/D4998

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