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ASTM D4998-95(2003)e1

ASTM D4998-95(2003)e1

Standard Test Method for Evaluating Wear Characteristics of Tractor Hydraulic Fluids

2012-02-13 /Historical
Superseeded by:
Significance and Use:

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.


1.1 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.

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
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