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It's Not Just About Viscosity Grade
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OEMs typically recommend an ISO viscosity grade for hydraulic systems, while other characteristics are often ignored. Hydraulic fluids vary in many key properties, including their thermal and oxidative stability, friction reduction capability, detergency, antifoam characteristics, demulsibility, hydrolytic stability, and ability to maintain viscosity across the temperature range.
When any of these properties in a hydraulic fluid are not up to the challenges the equipment and environment pose, they can compound challenges in other areas. Further, some applications or environments have specific requirements, such as fire resistance, food grade, and environmental and dielectric strength. |
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Selecting the Right Oil is Key to Performance
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With both system performance and equipment reliability affected by the lubricant, selecting the right fluid is of utmost importance. Working with a knowledgeable consultant who can help you select and maintain your hydraulic fluid can be the difference between trouble-free operation or continuous problems. LE provides a range of hydraulic fluids for various applications and environments, all of which are engineered to provide the best protection for your equipment.
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Hydraulic Oil Selection Considerations
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Viscosity - The oil selected must have the right viscosity and be able to maintain its viscosity throughout its working life.
- Maintaining viscosity is influenced by the oil’s ability to withstand oxidation, resist foam, separate from water, and withstand effects from temperature fluctuations.
Oxidation - Oxidation rates increase as the temperature goes up and as the percentage of contaminants in the system increases.
- The right oxidation inhibitors can help extend oil life and prevent costly change-outs.
Rust & Corrosion
- With the right additive package, hydraulic oil will provide long-term protection from rust and corrosion.
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Foam - When present in hydraulic fluid, foam is normally a symptom of another problem; however, it can also cause several issues, including oxidation, viscosity changes, cavitation and micro-dieseling, elevated temperatures, reduced film strength, increased oil compressibility, and varnish.
- Controlling foam is essential to hydraulic performance; select a fluid that will not foam in service.
Water - Other than fire-resistant fluids, hydraulic oils should shed water quickly so it can be removed.
- If not, emulsification will lead to equipment failure and performance loss.
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LE Hydraulic Oils: Providing Solutions for Every Challenge |
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Equipower Hydraulic Oil Anti-wear hydraulic oil designed to assure longer life for bearings and rubbing surfaces, Equipower™ Hydraulic Oil (4932-4934) contains select base oils for oxidation resistance and an additive package that offers anti-wear properties, rust protection and thermal stability.
Recommended for hydraulic systems operating in highly contaminated environments or where high lubricant consumption is a concern.
Typical Applications - Mobile and stationary hydraulic systems that call for anti-wear hydraulic fluid
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Equipower Ultra HVI Hydraulic Oil Long-lasting, nonfoaming, high viscosity index oil designed to extend the life of hydraulic systems, Equipower™ Ultra HVI Hydraulic Oil (6522, 6532, 6546) offers superior protection against water contamination, rust, corrosion and oxidation.
Contains Monolec®, LE’s exclusive wear-reducing additive. Outperforms other commercial hydraulic oils in thermal, oxidative and hydrolytic stability. Recommended for hydraulic applications with operating temperatures that fluctuate widely on a daily basis.
Typical Applications - Construction equipment
- Well service equipment
- Utility service boom trucks
- Forklifts
- In-plant stationary applications
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Equipower Ultra Hydraulic Oil Long-lasting, nonfoaming oil designed to extend the life of hydraulic systems, Equipower™ Ultra Hydraulic Oil (6132, 6146, 6168) offers superior protection against water contamination, rust, corrosion and oxidation.
Contains Monolec®, LE’s exclusive wear-reducing additive. Outperforms other commercial hydraulic oils in thermal, oxidative and hydrolytic stability.
Typical Applications - In-plant stationary applications
- Forklifts
- Construction equipment
- Well service equipment
- Utility service boom trucks
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Additional Hydraulic Solutions
from Lubrication Engineers
Fire-Resistant
Environmentally Friendly
Food Grade
Other
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Importance of Using the Right Viscosity Fluid Hydraulic pumps convert mechanical energy from electric motors or internal combustion engines into fluid flow; however, some energy is always lost during this process. Mechanical losses occur due to fluid friction at higher viscosities, while volumetric losses due to internal fluid leakage occur at lower viscosities.
Each hydraulic pump has an optimum operating viscosity range that will provide maximum pump efficiency by keeping mechanical and volumetric losses to a minimum.
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All LE hydraulic oils are available for quote or purchase online or
through your local LE lubrication consultant. Contact us today to get started. |
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