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Royco 756 Aircraft Hydraulic Fluid – MIL-PRF-5606, 1 Gallon

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Keep your hydraulic systems running at peak performance with Royco 756 - 1 Gallon Container (MIL-PRF-5606), now available in a 1-gallon container. Designed for professionals who demand the best, this mineral oil-based hydraulic fluid is the trusted choice for aerospace and industrial applications. Whether you're conducting a full system refill or stocking up for future maintenance, this 1-gallon size ensures you have an ample supply of top-quality fluid on hand.

Why Royco 756 Stands Out

Specifications

Ideal for the Pros

For pilots and mechanics who won't settle for anything less than the best, Royco 756 delivers consistent, reliable performance. Its 1-gallon size is perfect for comprehensive maintenance tasks, ensuring you have enough fluid to keep your aircraft or machinery in top condition.

Why Order Your 1-Gallon Royco 756 Now

Equip your aircraft or machinery with the best in hydraulic fluid technology. Order your 1-gallon container of Royco 756 from Pilot John International today and ensure your systems remain flight-ready and efficient. Experience the superior quality and performance that only Royco and PJi can offer, all while enjoying the convenience of a larger, more economical size.

Alternate Models
4055741Manufacturer's Part Number
41-1GLPrevious Part Number
MILH5606GLPrevious Part Number
General Information
Part #756-1GL
ManufacturerRoyco
MSDS 1View Safety Data Sheet
Shipping Information
Product Weight8 lbs.
Product Dimensions6.5 x 6.5 x 8 in.
Schedule B2710193080
ECCNEAR99

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AIRCRAFT COMPATIBILITY

Compatible Aircraft*
Agusta A109A , A109C , A109E , A109S , Mark II
Airbus Military (CASA) C-295 , CN-235/HC-144A
BAe ATP , Jetstream 31 , Jetstream 41 , RJ70 , RJ85
Bell 204 , 205 , 206B3 , 206L4 , 206LT , 212 , 214 , 214ST , 222 , 230 , 407 , 407GX , 412 , 427 , 430 , CH-139 , OH-58 , TH-67 , UH-1 , UH-1H
Boeing 234 Chinook , CH47, MH47 Chinook
Bombardier C-21 , CL-215 , CL-215T , CL-415 , Learjet 23 , Learjet 24 , Learjet 25 , Learjet 31 , Learjet 31A , Learjet 35 , Learjet 45 , Learjet 55 , Learjet 60 , Learjet 70 , Learjet 75
Cessna 310 , 320 , 337 Skymaster , 340 , 411 , 414 , 414A , 421 , Caravan 406
Dassault Falcon 10-100 , Falcon 20-200 , Falcon 2000 , Falcon 2000EX , Falcon 50 , Falcon 50EX , Falcon 900 , Falcon 900EX
Embraer EMB-110 , EMB-120
Eurocopter AS330 Puma , BK-117 , BO-105
Fairchild/Dornier Dornier DO328 , Dornier DO328 Jet , Envoy 3
Fokker 50
General Dynamics Convair 580 , Convair 600 , Convair 640
Gulfstream Aero Commander , Turbo Commander
Hawker Beechcraft Beechjet 400A , Diamond , Hawker 1000 , Hawker 4000 (Horizon) , HS-125 400 Series , HS-125 800 / 850 / 900 Series , Premier , T-1 Jayhawk , T-400 , T-6A Texan II
Lockheed Jetstar C-140
Nihon YS-11
Northrop T-38
Pilatus PC-12
Piper Aerostar , Aztec , Cherokee , Cheyenne II , Cheyenne III , Chieftan , Comanche , Navajo , Seneca
Saab 2000
Sabreliner 40 Series , 60 Series , 70 Series
Shorts 330 , 360
Sikorsky S-61 , S-65 (CH53, HH53, MH53, Sea Stallion) , S-76 (AUH-76)
*This list is for general reference only and may not be entirely accurate for all aircraft. Please confirm all equipment meets the requirements of your aircraft with the owners/maintenance manuals prior to purchasing or using with your aircraft.

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QUESTIONS & ANSWERS

Question:
What is Royco 756 aircraft hydraulic fluid used for?
Answer:

Royco 756 is a mineral-based hydraulic fluid primarily used in aviation systems that require MIL-PRF-5606H specification compliance. It is designed for use in aircraft hydraulic systems, shock struts, brake systems, and other components requiring a fire-resistant, low-viscosity fluid. It is widely used in both military and civilian aircraft operations.

Asked June 18, 2025
Question:
Can Royco 756 hydraulic fluid be used in brake and landing gear systems?
Answer:

Yes! Royco 756 is commonly used in aircraft brake systems and landing gear shock struts. Its excellent lubricity, thermal stability, and oxidation resistance make it suitable for high-load, high-stress aircraft components. It performs well across a broad temperature range, ensuring reliable operation in braking and strut systems.

Asked June 18, 2025
Question:
Is Royco 756 compatible with other hydraulic fluids?
Answer:

Royco 756 is compatible with other mineral-based hydraulic fluids that meet the MIL-PRF-5606H specification. However, it should not be mixed with phosphate ester-based fluids like Skydrol, as this can lead to system contamination or component damage. Always flush and service systems before switching fluid types.

Asked June 18, 2025
Question:
What is the shelf life of Royco 756 hydraulic fluid?
Answer:

When stored properly in its original, unopened container, Royco 756 has a shelf life of up to 4 years (48 months). To maintain its quality and performance, the fluid should be kept in a cool, dry place away from direct sunlight and extreme temperatures. Always follow manufacturer storage guidelines and check the production or expiration date before use to ensure compliance with aviation maintenance standards.

Asked June 18, 2025
Question:
What safety precautions should be taken when handling Royco 756?
Answer:

While Royco 756 hydraulic fluid is relatively low in toxicity, it is important to use standard personal protective equipment (PPE) such as gloves and safety glasses. Avoid prolonged skin contact and always consult the Safety Data Sheet (SDS) for detailed handling, storage, and disposal guidelines.

Asked June 18, 2025
Question:
Can Royco 756 be used in helicopters as well as fixed-wing aircraft?
Answer:

Yes! Royco 756 is suitable for both helicopters and fixed-wing aircraft. Its performance characteristics and wide operating temperature range make it versatile enough for rotorcraft hydraulic systems, especially where MIL-PRF-5606 compliance is required.

Asked June 18, 2025
Question:
What types of seals and elastomers are compatible with Royco 756?
Answer:

Royco 756 is compatible with common aviation seals, including nitrile (Buna-N), fluorosilicone, and Viton materials. It’s essential to confirm compatibility with OEM specifications before use, especially if seals have previously been exposed to synthetic fluids.

Asked June 18, 2025