A Guide to Hydraulic Oils

Whether you’re working with industrial equipment, agricultural machines, or vehicle systems, understanding hydraulic oil’s properties and applications is crucial for maintaining efficiency and prolonging the lifespan of your machinery.

What is hydraulic oil?

Hydraulic oil is formulated fluid used in hydraulic systems to transmit power. Unlike standard lubricants, hydraulic oil is engineered to perform under pressure while providing corrosion protection, wear resistance, and temperature stability. These characteristics make hydraulic oil indispensable for smooth and efficient operation in various applications.

Hydraulic oils are made from refined mineral oils, though synthetic and biodegradable options are also available to meet specific environmental or performance needs.

Common additives include;

• Anti-wear agents reduce friction and extend the lifespan of system components
• Antioxidants prevent the oil from breaking down under high temperatures
• Anti-foam agents ensure smooth operation by reducing air bubbles
• Viscosity improvers maintain performance across varying temperatures

Common grades include ISO VG 32, 46, and 68 and can be used in both heavy-duty industrial equipment or smaller tools like jacks.

The choice of grade depends on the specific application and operating environment. For example, ISO VG 32 is typically used in colder conditions, while ISO VG 68 is preferred for heavy-duty applications requiring thicker oil.

Is hydraulic oil combustible?

Hydraulic oil is not classified as flammable under normal conditions but is considered combustible

This distinction is crucial for understanding safety implications as combustibility means that, while hydraulic oil doesn’t ignite easily at room temperature, it can catch fire under the right conditions.

Can you use hydraulic oil in a jack?

Hydraulic oil is the recommended fluid for hydraulic jacks as these systems rely on precise pressure and flow characteristics to lift heavy loads efficiently.

Using hydraulic oil ensures the Jack operates smoothly providing adequate lubrication while transferring power to the lifting mechanism. Hydraulic jacks typically require a medium-viscosity oil such as ISO VG32 or VG46.

Oils with anti-wear and anti-corrosion additives protect the jack’s internal components from wear and rust. Using substitutions with other fluids such as motor oil or transmission fluids can compromise Jack’s performance and longevity.

Choosing the Right Hydraulic Oil for Your Needs

Hydraulic oil is the backbone of many mechanical systems. From industrial machinery to hydraulic jacks, selecting the right oil grade and formulation is essential for optimal performance and safety.

If you would like to learn more about hydraulic oil and which would be suitable for your requirements please contact Fluid Power Services today.