Royco 756 Aircraft Hydraulic Fluid - MIL-PRF-5606

Royco Aircraft Hydraulic Fluids

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Royco 756 is a red-dyed, mineral oil-based hydraulic fluid developed for the severe-duty demands of aerospace and industrial service. Royco 756 contains additives that provide excellent low-temperature fluidity as well as exceptional antiwear, oxidation - corrosion inhibition, and shear stability. In addition, metal deactivators and foam inhibitors are provided in this high viscosity index fluid to enhance performance in many general-purpose hydraulic applications.

New Available

Part Number
Royco 756-1GL
MIL-PRF-5606 - 1 Gallon
Royco 756-1QT
MIL-PRF-5606 - 1 Quart
Royco 756-55GL
MIL-PRF-5606 - 55 Gallon Drum
Royco 756-5GL
MIL-PRF-5606 - 5 GL
Royco 756-Case-24QT
MIL-PRF-5606 - 1 Case - 24 Quarts
Royco 756-Case-6GL
MIL-PRF-5606 - 1 Case - 6 Gallons
  • Wide operating temperature range
  • Low temperature fluidity
  • Exceptional anti-wear performance
  • "Super Clean" fluid to improve equipment life (Royco 756)
  • Excellent oxidation and corrosion inhibition

    • Approvals
      ROYCO 756 meets all requirements and is qualified under MIL-SPEC: Mil-PRF-5606H that supersedes Mil-H-5606, Mil-O-5606, AN-O-336, AN-VV-O-336, and AAF-3580. ROYCO 756A meets Mil-H-5606A.


      Royco 756 is designed for use in aircraft, missiles, autopilots, shock absorbers, cherry pickers, boom trucks, robotics, and auto wreckers requiring all-weather performance. Royco 756 is particularly recommended for use in systems where a "super clean" fluid can contribute to improved component life and reliability. Royco 756 can be used in unpressurized systems operating at temperature ranges from -54 to 90 degree C (-65 to 195 degree F) and in pressurized systems from -54 to 135°C (-65 to 275 degree F) at pressures up to 3000 psi. Royco 756A may be used in systems not requiring a “super clean” id and where the convenience of a resealable container can provide cost savings.