Caterpillar Hydraulic Oil (HYDO)
Caterpillar Hydraulic Oil is formulated with a balanced additive system. The system includes the following agents: detergents, rust inhibitors, antiwear agents and defoamers. Caterpillar Hydraulic Oil offers protection against mechanical wear, against rusting, and against corrosive wear in hydraulic systems and in hydrostatic transmission systems. Caterpillar Hydraulic Oil should be used to achieve maximum life and maximum performance from hydraulic system components and from hydrostatic transmissions. Caterpillar Hydraulic Oil is recommended in most hydraulic systems and in most hydrostatic systems.
- Caterpillar Hydraulic Oil
If a different viscosity is required due to ambient temperatures, the following Caterpillar oils can be used:
- Caterpillar Multigrade Diesel Engine Oil (DEO)
- Caterpillar Single Grade Diesel Engine Oil (DEO)
- Caterpillar Transmission/Drive Train Oil (TDTO)
- Caterpillar Multipurpose Tractor Oil (MTO)
Commercial Oils
If Caterpillar oils cannot be used, the following commercial classifications can be used in hydraulic systems and in hydrostatic transmission systems:
- CG-4 engine oils that have a minimum zinc additive of 0.09 percent (900 ppm)
- CF-4 engine oils that have a minimum zinc additive of 0.09 percent (900 ppm)
- CF engine oils that have a minimum zinc additive of 0.09 percent (900 ppm)
Caterpillar Biodegradable Hydraulic Oil (HEES)
Caterpillar has a biodegradable hydraulic oil that is available for use in machine hydraulic systems. This fluid is recommended for the hydraulic systems when environmental compliance is required or desired.
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| Illustration 1 | g00103844 |
Machines with this symbol are filled with biodegradable hydraulic oil. This symbol is located on the hydraulic tank.
This fluid is formulated from a saturated HEES (Hydraulic Environmental Ester Synthetic) synthetic base stock and selected additives. Use this oil only in hydraulic systems. Do not use the oil in compartments with brakes and clutches. Do not use BIO HYDO (HEES) oil in machine hydraulic systems with jacket water cooling such as large track-type tractors or off-highway trucks. BIO HYDO (HEES) is recommended for operation at tank temperatures of −32 to 100°C (−25 to 212°F). While the oil is in the specified range of temperatures, the oil has a viscosity that is similar to SAE 10W or to ISO VG 46.
Caterpillar BIO HYDO (HEES) may become darker in color throughout the service life of the oil. Analysis is required to determine the quality of the oil.
The maximum recommended water content for hydraulic systems that are filled with Caterpillar BIO HYDO (HEES) is 0.10 percent. If the water levels exceed 0.10 percent, the water should be removed or the oil should be replaced.
Consult your CLAAS dealer for additional information on this product and on the potential use.
Commercial Biodegradable Hydraulic Oil
If Caterpillar BIO HYDO (HEES) is not used, commercial oils which meet the Caterpillar BF-1 specifications should be used.