Title: (Optional) Select hydraulic fluid/oil based on the application and manufacturer recommendations.
Course: Agricultural Power Systems (18402-I) > Section: Using Fuels, Lubricants, and Fluids

Selection should include types and characteristics required for the hydraulic system. Fluid characteristics include

- rust and oxidation
- thermal stability
- hydrolytic stability
- low chemical corrosiveness
- high anti-wear characteristics
- low tendency to cavitate
- fluid life, disposability (according to federal, state, and local laws and regulations)
- foaming
- total water rejection
- constant viscosity, regardless of temperature.

Selection should take into consideration

- maximum and minimum operating and ambient temperatures
- pumps used
- operating pressures and cycle
- loads encountered by all components
- control and power valve types.

Process/Skill Questions:

- Where can you find information about the type and quality of hydraulic fluid needed?
- What is the purpose of hydraulic fluid?
- Why is it important to always consult the owner’s manual or review the manufacturer recommendations regarding hydraulic fluid selection?