Aeroshell 41 Fluid, MIL-PRF-5606J

AeroShell Fluid 41 is a superclean, mineral-based aircraft hydraulic fluid formulated for modern aviation hydraulic systems requiring a MIL-PRF-5606 type hydraulic fluid. It provides excellent low-temperature fluidity along with anti-wear, antioxidant, corrosion-inhibition, and shear-stability performance.

AeroShell Fluid 41 is widely used in aircraft hydraulic applications, including landing gear hydraulic systems, where cleanliness and reliable low-temperature performance are important. The current AeroShell specification is MIL-PRF-5606J, with additional qualifications and designations including DEF STAN 91-48, NATO H-515, and Joint Service OM-15.

AeroShell Fluid 41 is also commonly searched and specified under the earlier MIL-PRF-5606H designation. The existing BAC URL is retained to support customers searching for the MIL-PRF-5606H version and related aircraft hydraulic-fluid requirements.

Features & Benefits

• Superclean mineral hydraulic fluid manufactured to a high level of cleanliness for demanding aircraft hydraulic systems.
• Excellent low-temperature fluidity supports hydraulic system operation in cold environments.
• High viscosity index helps maintain useful viscosity across a broad operating temperature range.
• Anti-wear protection helps protect hydraulic pumps, actuators, valves, and other system components.
• Oxidation and corrosion inhibition helps protect hydraulic components and maintain fluid performance.
• Shear stability supports consistent hydraulic performance during service.
• Foam control supports reliable hydraulic operation.
• Red dyed mineral oil for easy identification as an aviation hydraulic fluid.

Applications

AeroShell Fluid 41 is intended for modern aircraft hydraulic systems requiring a mineral-based MIL-PRF-5606 type hydraulic fluid.

• Aircraft hydraulic systems
• Aircraft landing gear hydraulic systems
• Hydraulic actuators
• Aircraft hydraulic pumps
• Hydraulic valves and control systems
• Aircraft systems requiring MIL-PRF-5606 type hydraulic fluid
• Industrial hydraulic applications where this fluid specification is appropriate

AeroShell Fluid 41 is particularly recommended where the use of a superclean hydraulic fluid can contribute to improved component reliability.

Operating Temperature Range

Actual operating limits are dependent on the aircraft hydraulic system and applicable equipment manufacturer's requirements.

Specifications & Approvals

Always verify the applicable specification revision and equipment approval against the current aircraft, component, or hydraulic-system maintenance documentation before use.

Typical Product Properties

Typical values are provided for information only and are not product specifications. Actual product characteristics may vary. Refer to the current manufacturer's Technical Data Sheet for current specifications.

Material Compatibility

AeroShell Fluid 41 should be used in systems incorporating synthetic rubber components. It must not be used in systems incorporating natural rubber.

AeroShell Fluid 41 is compatible with AeroShell Fluid 31, AeroShell Fluid 61, and AeroShell Landing Gear Fluid (LGF), subject to the applicable equipment manufacturer's requirements.

Chlorinated solvents should not be used to clean hydraulic components that use AeroShell Fluid 41. Residual solvent can contaminate the hydraulic fluid and may contribute to corrosion.

Product Information

Frequently Asked Questions

What is AeroShell Fluid 41?

AeroShell Fluid 41 is a superclean mineral-based aircraft hydraulic fluid designed for modern aircraft hydraulic systems requiring a MIL-PRF-5606 type fluid. It provides low-temperature fluidity, anti-wear protection, oxidation stability, corrosion inhibition, and shear stability.

What specification does AeroShell Fluid 41 meet?

The current Shell specification listing identifies AeroShell Fluid 41 with MIL-PRF-5606J. It is also listed to DEF STAN 91-48, DCSEA 415/A, NATO H-515, Joint Service OM-15, COMAC QPL-CMS-OL-104, and Rolls-Royce OMat 1064A.

Is AeroShell Fluid 41 the same as MIL-PRF-5606H?

AeroShell Fluid 41 has historically been approved to MIL-PRF-5606H, and older manufacturer documentation identifies Fluid 41 with that revision. Shell's current product information now identifies MIL-PRF-5606J as the current U.S. specification. Always verify the required specification revision in the applicable aircraft or component documentation.

What is AeroShell Fluid 41 used for?

AeroShell Fluid 41 is used in aircraft hydraulic systems requiring a mineral hydraulic fluid, including landing gear hydraulic systems and other hydraulic pumps, actuators, valves, and control systems.

Is AeroShell Fluid 41 a mineral or synthetic hydraulic fluid?

AeroShell Fluid 41 is a mineral-based hydraulic fluid. AeroShell Fluid 31 is a different product based on synthetic hydrocarbon chemistry.

What color is AeroShell Fluid 41?

AeroShell Fluid 41 is dyed red.

Can AeroShell Fluid 41 be used with natural rubber seals?

No. AeroShell Fluid 41 should be used with synthetic rubber components and must not be used in systems incorporating natural rubber.

What is the temperature range of AeroShell Fluid 41?

Shell identifies operating ranges of approximately -65°F to 194°F for unpressurized systems and -65°F to 275°F for pressurized systems. Actual limits depend on the specific aircraft hydraulic system and equipment requirements.

Can AeroShell Fluid 41 be substituted for other MIL-PRF-5606 fluids?

Lubricant substitution should only be made when permitted by the applicable aircraft, component, or hydraulic-system manufacturer's documentation. Do not substitute hydraulic fluids based solely on a similar specification number.