Aircraft Hydraulic Fluids
Aircraft hydraulic fluids transmit power and motion in the hydraulic systems that operate various aircraft components, including landing gear, flaps, brakes, and steering systems.
Hydraulic fluid also serves as a lubricant and a coolant for aircraft hydraulic system components, helping to prevent wear and overheating.
PJi offers an expansive selection of aircraft hydraulic fluid to keep your aircraft flight ready. Our aviation specialists will help you find the best hydraulic fluids for your aircraft.
Aviation Hydraulic Fluid – Skydrol, 5606, MIL-SPEC
Whether you’re looking for Skydrol hydraulic fluid, 5606 hydraulic fluid, or MIL-SPEC hydraulic fluid, PJi has got you covered!
What are the three most common types of aircraft hydraulic fluid?
There are three main types of hydraulic fluids used in aircraft:
- Mineral oil-based fluids (5606, 83282)
- Synthetic hydrocarbon-based fluids (87257, AeroShell Fluid 31)
- Phosphate ester-based fluids (Skydrol, Hyjet)
The type of hydraulic fluid used depends on the specific requirements of the aircraft’s hydraulic system, including temperature range, operating pressure, and compatibility with other materials.
Mineral oil-based fluids are used in most general aviation and commercial aircraft. Synthetic fluids are used in some military and high-performance aircraft because they offer better performance at high temperatures and pressures. Phosphate ester-based fluids are used in some military and commercial aircraft due to their fire-resistant properties.
