When hydraulic oil prices rise and lead times become longer, one question becomes increasingly important: does the oil really need to be changed?
In many hydraulic systems, oil changes are still carried out at fixed intervals. However, modern hydraulics increasingly relies on facts rather than calendar-based decisions. Through oil analysis, effective filtration, and continuous condition monitoring, it is possible to assess both the health of the oil and the condition of the hydraulic system in real time.
Instead of changing oil “just to be safe,” maintenance activities can be planned based on actual needs. The result is lower costs, higher operational reliability, and reduced environmental impact.
The Oil Reveals the Health of the System
Hydraulic oil acts as the bloodstream of the system. Everything that happens within the system leaves traces in the oil.
Through regular oil analysis, it is possible to detect:
- Wear from pumps, valves, and cylinders
- Dirt and particle ingress
- Water contamination
- Oxidation and oil aging
- Additive depletion
- Changes in viscosity
For example, elevated iron levels may indicate increased wear in a pump. Elevated silicon levels can suggest that dust or dirt is entering the system. Water content can reveal problems with coolers, tank ventilation, or condensation.
In this way, oil analysis becomes a tool for monitoring not only the oil itself but the overall health of the hydraulic system.
ITH Analys AB Helps Companies Make the Right Decisions
Through oil analysis, companies can obtain a fact-based foundation for determining when action is truly needed.
ITH Analys AB specializes in oil analysis and cleanliness within hydraulic systems and offers testing of particle contamination, water content, wear particles, additive condition, and oxidation levels. Through advanced methods such as elemental analysis (SOAP) and RULER testing, both oil condition and component health can be assessed with high precision.
With the right analysis program, many organizations can significantly extend oil life while reducing the risk of equipment failures.
HYDAC Fluid Care – From Oil Sampling to Continuous Monitoring
For those looking to take the next step, HYDAC offers a comprehensive solution through its Fluid Care Program.
The program combines oil analysis, filtration, condition monitoring, and maintenance strategies to ensure reliability in hydraulic and lubrication systems. HYDAC actively monitors oil quality, contamination levels, and system condition to maximize the service life of both the oil and the equipment.
Using sensors that measure particle contamination, water content, and other critical parameters, changes can be detected long before they result in downtime. HYDAC’s condition monitoring solutions also make it possible to track trends over time and identify developments that would otherwise be difficult to detect.
Bosch Rexroth Uses Condition-Based Maintenance
Bosch Rexroth also actively works with condition monitoring and predictive maintenance through its service agreements and condition monitoring solutions.
By monitoring contamination levels, water content, and other critical parameters, maintenance can be planned according to actual operating conditions rather than fixed intervals. Bosch Rexroth describes how its systems help users avoid unnecessarily frequent oil changes while reducing the risk of unplanned downtime.
In many applications, continuous monitoring of hydraulic oil cleanliness is also used to quickly detect harmful particles before they cause component damage or production disruptions.
Filtration – The Most Profitable Investment
Even the highest-quality hydraulic oil will eventually be affected by contamination.
Effective filtration is therefore one of the most important measures for extending oil life. By continuously removing particles, water, and degradation products, both the oil and the components can be protected.
HYDAC particularly emphasizes the relationship between oil cleanliness, component life, and system availability. The cleaner the oil, the longer the service life of both the oil and the hydraulic system components.
The Future of Maintenance Is Built on Knowledge
The technology for monitoring hydraulic oil has developed rapidly in recent years. However, sensors, analytical equipment, and filters are only tools.
To interpret the results, understand the relationships, and make the right decisions, knowledge is essential.
This is why training is becoming an increasingly important part of modern maintenance. One example is the course The Value of Oil Sampling, delivered by ITH – Institute of Applied Hydraulics. The course provides participants with the knowledge needed to interpret oil analyses, identify important parameters, and use the results to reduce costs, prevent failures, and extend the life of both oil and components. For many years, ITH has combined training, analysis, and consulting services to improve knowledge of hydraulic systems.
At a time when both resources and availability are becoming increasingly important, knowledge may be the most profitable investment of all. The best hydraulic oil is often the oil that is still healthy enough to remain in service.
