Hey there! As a supplier of Ashless Hydraulic Oil HM68#, I often get asked if this oil can be used in hydraulic systems with radial-piston pumps. It's a great question, and I'm here to break it down for you.
First off, let's talk a bit about radial-piston pumps. These pumps are known for their high pressure capabilities and are commonly used in heavy-duty industrial applications. They operate by using pistons arranged in a radial pattern around a central shaft. When the shaft rotates, the pistons move in and out, creating a pumping action. These pumps are pretty sensitive when it comes to the hydraulic fluid they use because the pistons need to move smoothly and the internal components need protection from wear and tear.
Now, let's dive into Ashless Hydraulic Oil HM68#. This oil is part of the Ash-free Anti-wear Hydraulic Oil series. It's designed to provide excellent anti-wear protection, which is super important for any hydraulic system. The "ashless" part means that it doesn't contain any metal-based additives that can leave behind ash deposits. This is a big plus because ash deposits can clog up small passages in the hydraulic system and cause all sorts of problems, like reduced efficiency and even component failure.
The "HM68" in the name indicates the viscosity grade of the oil. Viscosity is basically how thick or thin the oil is. A grade of 68 is on the thicker side, which is suitable for operating conditions where higher pressures and loads are present. This viscosity helps to maintain a proper lubricating film between the moving parts in the pump, reducing friction and wear.
So, can Ashless Hydraulic Oil HM68# be used in hydraulic systems with radial-piston pumps? The answer is, in most cases, yes. Here's why:
Compatibility with Pump Materials
Radial-piston pumps are made up of various materials, including metals like steel and bronze, as well as seals made of rubber or elastomers. Ashless Hydraulic Oil HM68# is formulated to be compatible with these common materials. It won't cause corrosion of the metal parts or swell or shrink the seals. This compatibility ensures that the pump operates smoothly without any leaks or damage to the components.
Anti-Wear Performance
As I mentioned earlier, anti-wear protection is crucial for radial-piston pumps. These pumps have tight clearances between the pistons and the cylinders, and any excessive wear can lead to a loss of efficiency and increased maintenance costs. The anti-wear additives in Ashless Hydraulic Oil HM68# form a protective film on the metal surfaces, reducing friction and preventing direct metal-to-metal contact. This helps to extend the life of the pump and keep it running at peak performance.
Oxidation and Thermal Stability
Hydraulic systems with radial-piston pumps can generate a lot of heat, especially when operating under high loads. Ashless Hydraulic Oil HM68# has excellent oxidation and thermal stability. This means that it can withstand high temperatures without breaking down or forming harmful oxidation products. Oxidation can cause the oil to thicken and form sludge, which can clog filters and reduce the flow of the hydraulic fluid. By maintaining its stability, Ashless Hydraulic Oil HM68# ensures consistent performance of the hydraulic system.
Cleanliness
The absence of ash in the oil is a major advantage when it comes to keeping the hydraulic system clean. Radial-piston pumps are very sensitive to contamination, and even small particles can cause problems. Ashless Hydraulic Oil HM68# is formulated to be clean and free of deposits, which helps to keep the pump and the rest of the hydraulic system clean and functioning properly.


However, there are a few things to consider before using Ashless Hydraulic Oil HM68# in a hydraulic system with a radial-piston pump:
Manufacturer Recommendations
Always check the pump manufacturer's recommendations first. Some pump manufacturers may specify a particular type of hydraulic fluid or have certain requirements regarding viscosity, additives, and other properties. It's important to follow these recommendations to ensure that the pump is properly lubricated and protected.
Operating Conditions
The operating conditions of the hydraulic system also play a role. If the system operates in extremely cold or hot temperatures, you may need to adjust the viscosity of the oil accordingly. For very cold temperatures, a thinner oil like Ashless Hydraulic Oil HM32# might be more suitable. On the other hand, if the system operates under very high temperatures or pressures, the HM68# grade might be the best choice.
Contamination Levels
Make sure that the hydraulic system is kept clean and free of contaminants. Even though Ashless Hydraulic Oil HM68# is designed to resist contamination, dirt, water, and other foreign particles can still find their way into the system. Regularly check and change the oil filters, and take precautions to prevent contaminants from entering the system during maintenance.
In conclusion, Ashless Hydraulic Oil HM68# can be a great choice for hydraulic systems with radial-piston pumps in many situations. Its anti-wear properties, compatibility with pump materials, oxidation and thermal stability, and cleanliness make it suitable for heavy-duty applications. Just make sure to consider the manufacturer's recommendations, operating conditions, and contamination levels.
If you're interested in using Ashless Hydraulic Oil HM68# in your hydraulic system with a radial - piston pump, feel free to reach out. We can have a chat about your specific needs and see if this oil is the right fit for you. Whether you need more information, want to place an order, or just have some questions, don't hesitate to get in touch.
References
- Hydraulic System Handbook: A comprehensive guide on hydraulic systems and their components.
- Lubrication Technology Journal: Articles on the latest developments in lubricating oils and their applications.





