Skydrol LD-4 Aircraft Hydraulic Fluid

PJi is your complete source for Skydrol hydraulic fluid. The gold standard among Type IV hydraulic fluids, Skydrol LD-4 is available in a variety of sizes, including quarts, gallons, and drums.

Made by Eastman, Skydrol LD-4 hydraulic fluid is well-known for its low density, excellent thermal stability, and deposit control. Skydrol LD-4’s unique formula – which has been servicing aircraft for more than 35 years with no change in its chemical makeup – has an anti-erosion additive and acid scavenger that helps reduce valve erosion. 

With your PJi account, you can easily order Skydrol aviation hydraulic fluid and enjoy same-day shipping for in-stock fluids. Need help finding the right hydraulic fluid for your aircraft? Our aviation specialists are happy to assist you.

Eastman LD4-1GL
Eastman LD4-1GL
Skydrol LD-4 Aviation Hydraulic Fluid, 1 Gallon
Works with: Bravo, 737-BBJ, 737-BBJ2, Challenger 300, Challenger 600, Challenger 601, Challenger 604, Challenger 605 (CL605), Challenger 850, Global Express & more...
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$183.49/ea.
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Eastman LD4-55GL
Eastman LD4-55GL
Skydrol LD-4 Aviation Hydraulic Fluid, 55 Gallons
Works with: Bravo, 737-BBJ, 737-BBJ2, Challenger 300, Challenger 600, Challenger 601, Challenger 604, Challenger 605 (CL605), Challenger 850, Global Express & more...
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$6,860.00/ea.
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Eastman LD4-5GL
Eastman LD4-5GL
Skydrol LD-4 Aviation Hydraulic Fluid, 5 Gallons
Works with: Bravo, 737-BBJ, 737-BBJ2, Challenger 300, Challenger 600, Challenger 601, Challenger 604, Challenger 605 (CL605), Challenger 850, Global Express & more...
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$1,060.00/ea.
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What are the advantages of using Skydrol LD-4 hydraulic fluid?

Widely used in commercial and military aircraft, Skydrol LD-4 is designed to provide exceptional performance under extreme conditions and is particularly well-suited for use in aircraft hydraulic systems that operate in high-pressure and high-temperature environments.

One of the primary advantages of Skydrol LD-4 is its excellent resistance to wear and corrosion, which helps prolong the life of hydraulic components. In addition, Skydrol LD-4’s fire-resistant properties offer increased safety in the event of a hydraulic system failure.

What are some common applications of Skydrol LD-4 in the aviation industry?

Skydrol LD-4 aviation hydraulic fluid is widely used throughout the industry for a variety of applications, including landing gear systems, braking systems, power-assisted flight controls, and thrust reverser systems.

The specific applications of Skydrol LD-4 may vary depending on the aircraft manufacturer’s recommendations and the requirements of the hydraulic systems in different models of aircraft.

Does Skydrol have a MIL-SPEC?

No. Fire-resistant, phosphate-ester-based hydraulic fluids like Skydrol do not have a Military Specification (MIL-SPEC).

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