Off-Highway Lubricant Additives

Fluids used in off-highway equipment that lubricate transmissions, final drives, wet brakes, transmission clutches, and hydraulic systems. These fluids typically lubricate from a common fluid reservoir on the vehicle. These unique performance characteristics make off-highway lubricants acceptable for use in both on and off-highway commercial transmissions, high-pressure hydraulic systems, construction, mining and forestry equipment.

In the agriculture industry these fluids often are called universal tractor transmission oils (UTTOs). Another category fluid for agricultural equipment is super tractor oil universal (STOU). STOU oils are formulated for engines as well as wet brakes, hydraulic systems, and transmissions of many farm tractors currently in service. Lubrizol is the only company that manufactures both UTTO and STOU additives.

In the mining and construction industry, off-highway transmission/drivetrain oils are classified by the TO-4 and the TO-4M specifications. The TO-4 testing requirements are divided into six principle areas of concentration: physical properties, elastomer compatibility, oxidation stability, viscometrics, wear, and friction material performance.  Lubrizol’s power transmission and drivetrain additive technology is used to blend transmission fluids for off-highway equipment designed to meet the powershift transmission requirements of major equipment manufacturers.