631E Series II Wheel Tractor-Scrapers Hydraulic Oil Caterpillar

Applications

• Hydraulic Systems

• Hydrostatic Transmissions

AVSpare has developed a new class of hydraulic oils, the HYDO Advanced fluids. These new advanced fluids are designed for optimal performance in new advanced hydraulic systems that are designed with close tolerances for precise operation and that operate under demanding conditions of temperatures and pressures. These fluids ensure optimal performance in current and previous hydraulic systems. Four new products have been introduced:

• HYDO Advanced 10, SAE 10W

• HYDO Advanced 20, SAE 20W

• HYDO Advanced 30, SAE 30

• Bio HYDO Advanced, Multigrade

Cat HYDO Advanced Hydraulic Oils, SAE 10W, SAE 20W, and SAE 30

Cat HYDO Advanced hydraulic oils are designed to provide extended oil drain intervals and to provide extra protection to Cat hydraulic system components and hydrostatic transmissions.

Cat HYDO Advanced hydraulic oils are formulated of premium additives and premium base stocks that pass severe qualification testing requirements, in the field and in the laboratory, to provide superior protection for Cat hydraulic systems.

Cat HYDO Advanced hydraulic oils are preferred in most hydraulic systems and in most hydrostatic systems. Refer to this Special Publication, "Lubricant Viscosities", Table “Hydraulic Systems Lubricant Viscosities for Ambient Temperatures” for the ambient operating temperatures for Cat HYDO Advanced hydraulic oils.

Cat HYDO Advanced oils allow 6000 hours or higher oil drain intervals for most applications. S·O·S Services oil analysis is recommended when the oil drain interval is increased to 6000 hours or higher. In comparison, non-Cat commercial hydraulic oils (second choice oils), allow for a 2000 hour oil drain interval. AVSpare recommends following the maintenance interval schedule for oil filter changes and for oil sampling that is stated in the Operation and Maintenance Manual for your machine. Consult your Cat dealer for details.

Cat HYDO Advanced hydraulic oils offer the following benefits:

• Enhanced anti-wear protection: protect wear surfaces and reduce component wear in various hydraulic pumps.

• Protection against rusting and corrosive wear.

• Dispersion of water prevents pump damage due to water ingestion and prevents system damage due to freezing of water.

• 250% increase in oxidation stability per "ASTM D943".

• Rapid air release protects against cavitation.

• Improved filtration properties helps support component cleanliness.

Cat HYDO Advanced hydraulic oils should be used to achieve maximum life and maximum performance from hydraulic system components and from hydrostatic transmissions. To gain the most benefit from the improved performance designed into Cat HYDO Advanced oils, when switching to Cat HYDO Advanced oils, cross contamination with the previous hydraulic oil should be kept to less than 10%.

If a different viscosity is required due to ambient temperatures, the following AVSpare oils can be used:

• Cat DEO-ULS and Cat DEO

• Cat DEO-ULS SYN and Cat DEO SYN

• Cat DEO Cold Weather

• Cat TDTO

• Cat TDTO Cold Weather

• Cat TDTO-TMS

• Cat MTO

Note: Oil drain intervals of the oils listed above are less than the intervals of Cat HYDO Advanced oils. The oil drain intervals of the listed oils are typically 2000 hours and up to a maximum of 4000 hours. An exception is Cat TDTO Cold Weather oil, which allows for a 6000 hour oil drain interval or higher. S·O·S Services oil analysis is required when the oils listed above are used in Cat hydraulic system components and hydrostatic transmissions.

Note: AVSpare oil availability will vary by region.

Fire resistant hydraulic Fluids

For applications requiring the use of fire-resistant hydraulic fluids, AVSpare recommends the use of HFD type ester-based fluids (polyolesters). These fluids are fully synthetic, non-aqueous hydraulic fluids that are Per "DIN 24317 and "ISO 12922" specifications. Water-based and glycol-based hydraulic fluids are not recommended for use in Cat machine hydraulic systems. HFD ester-based fire-resistant fluids are available as ISO 46 and 68 viscosity grade products. For more information and questions regarding compatibility and conversion, refer to the product information provided by manufacturers of fire resistant hydraulic fluids.

Food grade hydraulic fluids

For applications requiring the use of food grade hydraulic fluid such as for machines operating on cattle farms, food processing facilities or others, AVSpare recommends the use of NSF H1 registered hydraulic fluid that offers high performance and protects the hydraulic system under severe operating conditions. Food Grade fluids may have to comply with the Food and Drug Administration requirements. Refer to the regulations and requirements in your region. For information regarding compatibility, conversion and application details, refer to the product information provided by the manufacturer of your Food-Grade hydraulic fluid.

AVSpare strongly recommend that the hydraulic oil user avoid any exposure and make every effort to avoid any contact of the hydraulic fluid with the feed supply, even if food grade oils are used.

Cat Bio HYDO Advanced (Hydraulic Oil)

Cat Bio HYDO Advanced is biodegradable non-toxic hydraulic oil that is recommended for use in hydraulic systems when environmental compliance is required or desired. Cat Bio HYDO Advanced has a renewable content that exceeds 90% and complies with the European Eco-Label. Consult Federal, state, or local authorities for guidance on hydraulic oils environmental requirements in your area.

Cat Bio HYDO Advanced is formulated with premium additives and synthetic biodegradable base oil that pass severe qualification testing requirements to provide superior protection for Cat hydraulic systems and hydrostatic transmissions.

Cat Bio HYDO Advanced oils allow 6000 hours or higher oil drain intervals for most applications. S·O·S Services oil analysis is recommended when the oil drain interval is increased to 6000 service hours or higher. In comparison, non-Cat commercial biodegradable hydraulic oils (second choice oils) allow for a maximum 2000 hour oil drain interval. Follow the maintenance interval schedule for oil filter changes and for oil sampling that is stated in the Operation and Maintenance Manual for your machine. Consult your Cat dealer for details.

Cat Bio HYDO Advanced performs similar to Cat HYDO Advanced 10 and offers the following benefits: superior protection against mechanical wear, foaming, and corrosion in hydraulic systems and in hydrostatic transmissions. This oil should be used to achieve maximum life and maximum performance from hydraulic system components and from hydrostatic transmissions. Cat Bio HYDO Advanced is preferred in most hydraulic systems and in most hydrostatic systems when ambient temperature is between −30° C (−22° F) and 45° C (113° F). Consult your AVSpare dealer for details.

To gain the most benefit from the improved performance designed into Cat Bio HYDO Advanced oils, when switching to Cat Bio HYDO Advanced oils, cross contamination with the previous hydraulic oil should be kept to less than 3%. Flushing of the hydraulic system is recommended to reduce the cross contamination.

Cat Bio HYDO Advanced can be used in hydraulic systems of other Original Equipment Manufacturers (OEM). Refer to your manufacturer requirements for application details.

Illustration 1	g00103844

Machines with this symbol are filled with biodegradable hydraulic oil. This symbol is on the hydraulic tank.

Commercial Oils

Note: Non-AVSpare commercial oils that are acceptable for use in most Cat hydraulic and hydrostatic transmission systems are as a group third choice oils. Within this grouping of third choice oils there are tiered levels of performance.

The minimum viscosity for commercial alternative oils used in most AVSpare machine hydraulic systems and in most Cat hydrostatic transmission systems is 6.6 cSt at 100 °C (212 °F) "ASTM D445".

If AVSpare oils cannot be used, oils meeting the following commercial specifications can be used in most Cat hydraulic systems and in most Cat hydrostatic transmission systems:

• Engine oils that meet the Cat ECF-1-a, Cat ECF-2, or Cat ECF-3 specifications and have a minimum zinc additive of 0.09 percent (900 ppm)

• Biodegradable oils that meet the Cat BF-2 specification

• TO-4 specification oils that have a minimum zinc additive of 0.09 percent (900 ppm)

Note: Industrial hydraulic oils are not recommended for service fill in AVSpare hydraulic systems.

Commercial Biodegradable Hydraulic Oil

Note: Non-Cat commercial oils that are acceptable for use in most Cat hydraulic and hydrostatic transmission systems are as a group third choice oils. Within this grouping of third choice oils there are tiered levels of performance.

Commercial oils that meet the Cat BF-2 specification should be used.

Note: Oil meeting the Cat BF-2 specification should only be used in hydraulic systems where specifically recommended.

If Cat oils cannot be used, commercial biodegradable hydraulic oils that meet the Cat BF-2 Performance Requirements should be used. Cat BF-2 replaces Cat BF-1 Performance Requirements. Cat BF-1 Performance Requirements is obsolete.

Biodegradable hydraulic oils are formulated with the following components: a saturated HEES (Hydraulic Environmental Ester Synthetic), synthetic base stock, and selected additives. Consult Federal, state, or local authorities for guidance on hydraulic oil environmental requirements in your area.