Learn About the Types of Hydraulic Oils and How to Choose the Right One
7 min reading time
Learn About the Types of Hydraulic Oils and How to Choose the Right One
Knowing the different types of hydraulic oils is essential for selecting the right one for your vehicle. The correct choice ensures optimal performance, lubricates the engine to withstand various temperatures, and enhances efficiency. If you want to learn how to choose the best hydraulic oil, when to change it, and the top options available at Tolmart Store, keep reading.
Hydraulic Oil for Vehicles
Hydraulic oil is a non-compressible fluid used in vehicles to transmit power and ensure smooth operation.
It serves multiple functions, including lubricating hydraulic system components to reduce wear and friction.
Additionally, it helps cool engine parts, protecting them from damage and reducing malfunctions.
This means that hydraulic oil is a vital product for ensuring the engine operates smoothly, maintaining its performance, and extending its lifespan.
Composition of Hydraulic Oil
Hydraulic oil consists of a base, which can be either mineral or synthetic, along with various other components.
It includes esters, mineral oil, silicon, and glycol, with additional additives that enhance its properties to meet different functional needs.
Some additives help ensure smooth oil flow under cold conditions, while others act as antioxidants to reduce unwanted deposits, extending oil life and reducing maintenance costs.
Additional additives prevent foam formation from detergents, which can affect the oil’s efficiency and lubrication ability, and include anti-rust agents.
Key Considerations for Choosing the Best Hydraulic Oil for Equipment
There are various types of hydraulic oils, but some essential factors should be considered when selecting the right one:
Choose a high-quality oil that efficiently performs lubrication, forming a thin protective layer to prevent rust and wear.
Ensure the oil has an appropriate viscosity level for the working conditions. It should not be too high to cause excessive friction or too low to cause leaks.
Select an oil that withstands temperature variations and is resistant to oxidation.
Ensure the oil is free from air bubbles and foam formation.
The oil should have a high boiling point with minimal evaporation pressure.
Opt for a high-density oil capable of quickly dissipating excess heat.
The oil should have a high resistance to combustion.
Choose an eco-friendly, non-toxic type.
Ensure it has anti-rust properties.
Select an oil that can be easily cleaned and filtered.
Purchase from a reputable brand and store that offers high-quality products.
Types of Hydraulic Oils
Hydraulic oils come in several types, including:
Petroleum-Based Hydraulic Oil: This type offers excellent lubrication properties, rust resistance, and a viscosity suitable for temperature changes. It is also affordable.
Synthetic Hydraulic Oil: Made from synthetic phosphate, this type has a low viscosity, is highly flammable, and tends to absorb water, making it suitable for high-speed applications.
Water-Glycol Hydraulic Oil: Ideal for systems with fire risks and heat sources, containing high-viscosity oils and glycerin with rust-resistant properties.
HWCF Oil: This oil contains a high percentage of water, offers excellent heat resistance, and is priced higher.
Hydraulic Oil Grades
Hydraulic oils are identified by specific numbers according to ISO or SAE automotive standards. These numbers indicate viscosity, technical specifications, and temperature resistance. Common grades include:
Hydraulic Oil 68: High viscosity, suitable for high temperatures.
Hydraulic Oil 46: Medium viscosity.
Hydraulic Oil 32: Low viscosity, ideal for cold temperatures.
Difference Between Hydraulic Oil 46 and 68
The number indicates viscosity, meaning oil 68 has a higher viscosity than 46.
Higher viscosity oils can withstand higher temperatures, making them suitable for heavy loads and high-pressure applications.
Uses of Hydraulic Oil 37
Hydraulic Oil 37 is one of the essential types, known for its oxidation resistance and durability. Key applications include:
Industrial hydraulic systems for operating machines and presses.
Heavy machinery like excavators and bulldozers.
Vehicle brake and steering systems.
Hydraulic elevators for smooth movement.
Agricultural equipment like tractors and plows.
Marine equipment and turbines due to its high resistance.
Benefits of Hydraulic Oils
All hydraulic oils offer numerous advantages, including:
Extending the lifespan of hydraulic systems and protecting components from wear.
Preventing rust and corrosion caused by heat and friction.
Lubricating pumps, actuators, and valves, reducing friction and heat.
Absorbing and reducing heat generated by movement.
Sealing small gaps between moving parts.
Reducing carbon emissions and environmental impact.
Cleaning hydraulic systems by removing debris from friction.
Enhancing performance and protecting systems from overheating.
Lowering maintenance costs by minimizing breakdowns.
Signs of Low Hydraulic Oil Levels
Choosing the best hydraulic oil is essential, especially when experiencing unusual heaviness in steering or vehicle operation, indicating low oil levels.
If you refill the oil and still notice a drop in quantity, it may signal a leak, requiring maintenance.
When to Change Hydraulic Oil
The oil change interval depends on various factors, including the type of vehicle, driving conditions, operating temperature, and mileage.
Manufacturers provide specific schedules for oil changes and maintenance guidelines.
Generally, hydraulic oil is changed every 24,000 – 36,000 km (approximately once a year).
More frequent changes may be needed in harsh driving conditions, heavy loads, or extreme climates.
Best Hydraulic Oils
You can find premium hydraulic oils at Tolmart Store, including:
5-Liter Hydraulic Oil
Hydraulic Oil 32 enhances system performance and longevity.
Provides ideal lubrication for high-pressure pumps and cylinders.
Prevents rust and reduces deposits, ensuring system protection.
Functions in various temperatures for optimal performance.
Visit Tolmart Store for the best hydraulic oils at competitive prices, ensuring vehicle efficiency and reduced maintenance costs.
Frequently Asked Questions
What are the pros and cons of hydraulic oils?
Pros: High energy transmission efficiency, wear resistance, and reduced friction between moving parts.
Cons: Sensitive to contamination and moisture, and may lose properties under extreme heat or pressure.
What are the standard hydraulic oil grades?
Common grades range from ISO 32 to ISO 68, depending on the system requirements.
What is the color of hydraulic oil?
Typically transparent to light yellow, but may change over time due to contamination or prolonged use.
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