ASTM D4998

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 the 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

ASTM Standards
D216 Method of Test for Distillation of Natural Gasoline
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
Deutsches Institut fur Normung (DIN)
DINStandard51354, Mechanical Testing of Gear Oils in the FZG Gear Test Machine

Index Terms

anti-wear characteristics; fluid; FZG; gear systems; hydraulic fluid; lubricants; petroleum and petroleum products; transmission fluid and gear oil; wear and wear life of lubricants; ICS Number Code 75.120 (Hydraulic fluids)

Citing ASTM Standards

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