New biodegradable universal tractor transmission oil based on rapeseed oil

J. Vižintin

Tribology: scientific final report, VTT Manufacturing Technology (2001) 90–95.


The main objective of transmission oil in tractor is to prevent scuffing and pitting failure and also normal rubbing wear which occurs at low speed and high load conditions associated with their oxidation stability. Oils must also provide the correct frictional balance to allow squawk-free wet brake performance and smooth transmission clutch engagement. At the same time, they must provide enough clutch capacity for efficient power transfer and enough brake capacity to stop the tractor in a reasonable time and distance. The EP/AW system used must not be so active as to cause corrosion in the tractor's hydraulic system where pumps containing alloys of copper can be presented.

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