Caterpillar - Cat Biodegradable Hydraulic Oil (HEES)
Unique formula for maximum performance and protection
Cat BIO HYDO (HEES) is formulated from a fully saturated Hydraulic Environmental Ester Synthetic (HEES) base stock and selected additives. It has excellent high-pressure characteristics and high-temperature oxidation stability, so it helps prevent gumming and deposits even at high operating temperatures.
Cat BIO HYDO (HEES) also:
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provides superior wear protection.
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offers excellent cold flow characteristics (pour point of -58°C).
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allows operation over a broad temperature range (high viscosity index).
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does not affect conventional sealing materials (complies with VDMA 24'569).
Fluid analysis for early detection
We recommend protecting your machine investment by using scheduled fluid analysis.
Our S-O-S SM analysis program is the ultimate detection and diagnostic tool for your equipment, helping you head off potential problems before they can lead to major failures and costly unscheduled downtime.
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Performance Specifications
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Cat BIO HYDO (HEES) exceeds Caterpillar BF-1 requirements for biodegradable hydraulic fluids. |
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Vickers Vane Pump (35VQ25)
Ring Wear 75 mg MAX Vane Wear 15mgMAX |
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FZG Rati ng (ASTM D5182) 11 MIN |
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Four-ball Wear Test
(ASTMD4172) 0.40 mm MAX Scar length (40 kg, 93°C, 600 rpm, 30min) |
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Friction Caterpillar BF-1,
Characteristics Section 7,SEQ1274 Section 7, SEQ1274 |
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Fluid Cleanliness (ISO 4406) 15/13 MAX 5/1 |
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Foaming Characteristics (ASTM D892)
Without Added Water Sequence I 25/0 MAX Sequence II 50/0 MAX Sequence III 25/0 MAX
With 0.1% Water Sequence I 25/0 MAX Sequence II 50/0 MAX Sequence III 25/0 MAX |
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Elastomer and Seal Caterpillar BF-1, Compatibility Section 2 Caterpillar BF-1, Section 2 | |
Environmental Compliance
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Cat BIO HYDO (HEES) is fully decomposed by soil or water microorganisms with little or no deposits. |
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Biodegradability |
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EPA 560/6-82-003 Minimum 60% biodegraded to C02 in 28 days |
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OECD301B Minimum 60% biodegraded to C02 in 28 days |
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Biodegradation > 83% (CEC-L-33-A-93) |
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Toxicity |
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Water hazard classification WGK 0 maximum |
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Fish (Rainbow Trout) acute toxicity (OECD 203) LC 50 > 1000 ppm at 48 hours | |
Proper use for health and safety
Spills and leaks
and leaks and leaksDepending on contamination and degradation levels, small amounts of spilled or leaked Cat BIO HYDO (HEES) will not adversely affect ground water or the environment. If a small amount is spilled on the ground, the uncontaminated product will readily biodegrade in the presence of naturally occurring soil organisms and the air.
However, you should always handle spills of Cat BIO HYDO (HEES) according to currently acceptable methods for conventional mineral oil spills. Check with local environmental agencies for laws and regulations.
Handling and use
According to toxicology information, Cat BIO HYDO (HEES) has little or no adverse effects if handled and used properly. No special precautions are suggested beyond attending to good personal hygiene and avoiding prolonged, repeated skin contact. For more information, refer to the "Material Safety Data Sheet," SEFV1602.
Recommended use
Application
Cat BIO HYDO (HEES) is recommended for Cat hydraulic systems that require readily biodegradable and low-toxicity fluids, as well as:
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Cat hydraulic systems operating over a broad ambient temperature range (-32°C to 43°C) and at tank temperatures up to 100°C.
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For maximum performance and environmental compliance do not mix Cat BIO HYDO (HEES) with other oils.
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The maximum recommended water content for hydraulic systems that are filled with Caterpillar BIO HYDO (HEES) is 0.10%. If the water levels exceed 0.10%, the water should be removed or the oil should be replaced.
Information sources
We can help you determine the right oil for your Cat machines, or you can refer to your "Operation and Maintenance Manual" or service publication SEBU6250 ("Caterpillar Machine Lubricant Recommendations").
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Typical Characteristics* |
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SAE Viscosity Grade |
10W |
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ISO Viscosity Grade |
46 |
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Specific Gravity (g/cm3) @ 15°C |
0.921 |
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Flash Point °C(ASTMD92) |
220 |
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Pour Point °C(ASTMD97) |
-58 |
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Viscosity, cSt@40°C(ASTM445) cSt@100°C(ASTM445) |
48.7 8.7 |
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Viscosity Index (ASTM D2270) |
160 |
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Zinc, ppm |
<5 |
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TAN mg KOH/g (ASTM 2896) |
1.3 |
* The values shown are typical values and should not be used as quality control parameters to either accept or reject product. Specifications are subject to change without notice.
Machines with this symbol are factory filled with biodegradable hydraulic oil. This symbol is located on the hydraulic tank.
Note: Cat BIO HYDO (HEES) should not be used in compartments requiring Cat tdTO or TO-4 commercial oils. For use in other machines, follow OEM recommendations.
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