What factors should you consider when choosing your hydraulic oil?

Choosing the right Hydraulic Oil is a crucial step to keeping your equipment running smoothly. This fluid helps absorb heat, transmit power, and reduce wear on components. When it comes to choosing the right oil, you’ll want to consider the temperature, compatibility with other fluids in your system, the age of your equipment, and viscosity.

These important factors will help ensure you make an informed decision about which hydraulic oil is best for your needs.


Temperature is one of the most important factors in choosing your hydraulic oil.

Viscosity changes with temperature, and this can have a huge impact on how it performs in your system. For example, if you choose a cold-worked fluid to be used in an application where it’s going to be operating at temperatures above 100°F (38°C), it may become too thin for normal operation. This will cause premature wear on certain parts and even equipment failure if it gets too bad!


Hydraulic Oil

Fluid compatibility

Fluid compatibility is an important factor when considering your hydraulic oil. If the fluid isn’t compatible with the Hydraulic Power Units, it can cause damage to the equipment and even lead to safety concerns. The following factors need to be considered when choosing a hydraulic fluid:

  • Hydraulic fluid should be compatible with the hydraulic system. For example, if you’re using a cast iron or bronze pump, choose an oil that’s compatible with these materials (e.g., ISO VG 32).
  • Hydraulic fluid should be compatible with the components in your system as well (e.g., ISO VG 32). If any of these components are made of polypropylene or polyethylene plastic which is more sensitive than cast iron or bronze pumps, then you may need a special type of oil (such as mineral-based oils).
  • Make sure that all seals have been replaced if any repairs have been done on your equipment recently—damaged seals can cause leaks which can eventually damage critical components like pumps or cylinders! You’ll want to make sure that there aren’t any cracks before proceeding either since this could cause leakage too.”

Age of the equipment

The age of your equipment will also play a role in determining what type of hydraulic oil you need. Older equipment tends to have seals that wear out over time, causing them to leak. If the seals cannot be repaired, it may be necessary for you to use a higher viscosity oil that can withstand higher temperatures without breaking down as quickly. If your hydraulic system was designed before biodegradable hydraulic oils were available, it’s likely that this is the type you currently use—and if so, then switching to an environmentally friendly option could help extend its life while also reducing pollution created by petroleum-based products.


The viscosity of your hydraulic oil is a measure of its thickness. The more viscous or thick the oil is, the more difficult it will be for it to flow through your system. This can cause problems like overheating or slow startup times for any machine that uses hydraulic fluid as part of its functions. With this in mind, it’s important to consider how you want your system to perform and how much pressure you want from your pump when choosing an oil with a specific viscosity rating.

The viscosity rating is also affected by temperature—the higher the temperature gets, the thinner (more liquid) your oil becomes and vice versa; colder temperatures make oils thicker (more viscous). In addition, age and additives can affect viscosity as well—a new bottle of hydraulic oil will typically have a lower viscosity rating than one that has been sitting on a shelf for several months before use because additives like rust prevent corrosion on metal surfaces which results in less friction, therefore, decreasing overall resistance between moving parts within pumps thus increasing efficiency over time!


While there are a lot of factors to consider, you don’t need to worry too much about finding the perfect oil. It’s more important to find one that is best suited for your equipment and uses. Don’t be afraid to ask for help if you’re not sure what kind of oil you need or if it will work with your equipment.

Written by Orange Blog

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