A Review of Farm Tractor Transmission Fluids

New “multifunctional” farm tractor transmission, hydraulic, and wet brake fluids are being introduced to the tractor industry. The background of tractor lubrication and hydraulic component development that created a need for these fluids is discussed.

Fluid friction characteristics tailored to wet brake, power takeoff (PTO), and transmission clutch performance along with improved antiwear and extreme pressure (EP) protection for gears are taking on more importance with the continued increase in tractor horsepower. At the same time, a long-sought goal of simplifying the number of lubricants required by the tractor industry is being realized through the use of these new fluids.