Shell Tellus - Hydraulic Oils
To meet the challenges of a wide range of hydraulic equipment and applications, Shell has designed a portfolio of fluids that enables you to choose a product to best match your needs.
About hydraulic systems
Hydraulic systems transmit power by pumping a fluid to move pistons or actuators and hydraulic motors. These systems are simple, efficient and flexible, and provide instant reversibility and precise speed control.
Hydraulic equipment needs to be responsive to ensure efficiency, productivity and product quality. It also needs to go on working reliably, as failures can be complex to resolve and extremely costly when they lead to downtime, lost production, component costs and missed shipments.
Signs of hydraulic problems include noise, elevated temperatures and slow or erratic operation.
It is important that the hydraulic fluid used matches the performance requirements of the hydraulic system’s operating type and conditions and end‑use application.
Hydraulic system
- Valves: control operating pressure and flow direction and volume. Oxidation resistance helps to prevent the formation of valve-blocking deposits, varnish and sludge.
- Pump: vane and gear pumps are common; piston pumps are for high-pressure and mobile equipment. Oxidation resistance helps to prevent acid formation and thus yellow metal corrosion.
- Actuator/piston: provides a force in both directions. Oxidation resistance helps to prevent the formation of performance-robbing varnish and sludge.
- Hydraulic fluid: transfers energy, lubricates components and transports contaminants to the filter.
- Filter: removes particulates. Oxidation resistance helps to prevent the formation of filter-blocking varnish and sludge.
- Reservoir: holds hydraulic fluid to provide time for air, water and particulates to separate.
Why does oxidation resistance matter?
Hydraulic fluids with good oxidation resistance last longer and help to prevent the potentially damaging effects of oil thickening and acid formation. They can help you to reduce the total cost of owning hydraulic equipment by
- extending fluid‑drain intervals
- reducing maintenance requirements
- maintaining operating efficiency and product quality.
Shell Tellus hydraulic fluids are designed to have excellent oxidation resistance. For example, the Bosch Rexroth A2F10 piston pump test (UCMAS P 045)1 evaluates the potential operational life for mobile equipment by measuring the oxidation stability of hydraulic fluids for use in construction applications. Shell’s fluids are assessed against this tough test and demonstrate strong performance.
Disclaimers:
1 Compared with industrial standards and conventional gear oil in the market, based on Shell internal laboratory results of standard wear and corrosion tests.