High-Performance Mineral Hydraulic Fluid for General Aircraft Systems

Product Overview

Royco 756 is a premium quality mineral hydraulic fluid developed for aircraft systems requiring compliance with MIL-PRF-5606. It is widely used in general aviation, military aircraft, and ground support hydraulic applications.

Engineered for dependable system response under varying environmental conditions, Royco 756 delivers consistent hydraulic performance, long service life, and effective system protection in high-pressure aviation environments.

Key Performance Benefits

• Excellent low-temperature fluidity
• High viscosity index for temperature stability
• Strong anti-wear performance
• Oxidation and corrosion resistance
• Clean system operation with minimal deposit formation

Royco 756 is suitable for use in landing gear systems, flight control hydraulics, braking systems, actuators, servo systems, and utility hydraulic equipment.

It is trusted by MRO facilities, defense operators, and fleet owners worldwide for reliable hydraulic performance.

Product Specifications

• Product Name: Royco 756
• Specification: MIL-PRF-5606
• Fluid Type: Mineral Hydraulic Fluid
• Application: General Aircraft Hydraulics
• Color: Red
• Base Oil: Mineral
• Military Approval: Yes
• Operating Pressure: High-pressure aircraft systems
• Performance Level: Very High

Technical Information

• Meets MIL-PRF-5606 requirements
• Excellent thermal and oxidation stability
• High shear stability
• Superior anti-wear protection
• Good seal compatibility
• Low foaming characteristics
• Suitable for extreme cold weather operations

Important: Royco 756 must not be mixed with phosphate ester–based hydraulic fluids such as Skydrol. Always follow aircraft maintenance manual (AMM) and OEM instructions.

Possible Alternative Product Numbers

The following products may be considered alternatives, subject to OEM approval:

• AeroShell Fluid 41
• MIL-H-5606
• Hydraulic Fluid 5606
• 5606 Aviation Hydraulic Oil
• NATO H-515 (where applicable)

Substitution must comply with aircraft maintenance documentation and system compatibility requirements.

Packaging & Commercial Details

• Available Packaging:
  • 1 US Quart Cans
  • 1 US Gallon Cans
  • 5 Gallon Pails
  • 55 Gallon Drums
  • Bulk supply options
• Commercial Support:
  • Certificate of Conformance (CoC)
  • Safety Data Sheet (SDS)
  • Full batch traceability
  • Export-ready documentation
  • Airline and MRO volume supply programs

Suitable For

• General aviation operators
• Defense aviation fleets
• Aircraft maintenance organizations (MRO)
• Aviation distributors

Frequently Asked Questions (FAQ)

Q1. What is Royco 756 used for?
It is used in aircraft hydraulic systems requiring MIL-PRF-5606 mineral-based hydraulic fluid.

Q2. Is Royco 756 compatible with Skydrol fluids?
No. It must not be mixed with phosphate ester hydraulic fluids.

Q3. What color is Royco 756?
It is dyed red for identification purposes.

Q4. Can it be used in military aircraft?
Yes. It meets MIL-PRF-5606 military specification requirements.

Q5. Does it perform well in cold temperatures?
Yes. It provides excellent low-temperature fluidity suitable for aviation environments.