Developed, tested and approved by Caterpillar, Cat Hydraulic Oil (HYDO) ensures optimum life and performance when used as recommended in Cat hydraulic and hydrostatic systems.

Cat HYDO is formulated with a balanced additive system, including detergents, dispersants, rust inhibitors, anti-wear agents and defoamers. It offers maximum protection against mechanical wear, rusting and corrosive wear in Cat hydraulic and hydrostatic transmission systems.

Cat HYDO contains:

Anti-wear Agents — Zinc dithiophosphate at 900 ppm(min.) to lubricate while reducing friction, wear and scuffing.
Emulsifiers — Disperse small amounts of water throughout the oil so water will not damage hydraulic system components.
Defoamers and Air Release Agents — Prevent the formation of bubbles by reducing oil surface tension to quickly release air content to the atmosphere.
Anti-oxidants — Prevent the formation of sludge and corrosive acids at high system temperatures and pressures.
Detergents/Dispersants — Keep components free of deposits, breaking up contaminants and holding them in suspension.