United Hydro Vesta Hydraulic Oil HT- 4 is the Transmission & Drive Train oil (TDTO). It was specially designed for hydraulic and hydrostatic systems. The oils have passed the requirements for the Caterpillar TO-4 oil specification may not only include the frictional requirements but also gear wear requirements.

United Hydro Vesta Hydraulic Oil HT- 4 oils offer maximum protection against mechanical wear, rusting and corrosive wear in all hydraulic and hydrostatic transmission systems. The additives used provide excellent friction control, less brake noise and reduced gear wear. Hence the products can prolong the life of brakes, transmissions as well as hydraulic systems.