SPECIFICATIONS

U.S. Approved MIL-PRF-5606H* (both U.S. and European production)

British Approved DEF STAN 91-48 GradeSuperclean* (European productiononly)Meets DEF STAN 91-48 Grade Normal (European production only)Equivalent to DEF STAN 91-48 Grades Superclean* & Normal (U.S. production only)

French Approved DCSEA 415/A

Russian Analogue to AMG-10

NATO Code H-515* (equivalent H-520)

Joint Service Designation OM-15* (equivalent OM-18)

*Superclean grades

The British specification DEF STAN 91-48 covers two grades (normal andsuperclean) of mineral hydraulic fluid which differ only in their cleanlinesslimits. AeroShell Fluid 41 is manufactured to meet the supercleanrequirements and thus it also meets the requirements of the normal grade.

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AEROSHELL FLUID 41

AeroShell Fluid 41 is a mineral hydraulic oil manufactured to a very highlevel of cleanliness, and possesses improved fluid properties. AeroShellFluid 41 contains additives which provide excellent low temperature fluidityas well as exceptional anti-wear, oxidation - corrosion inhibition and shearstability. In addition metal de-activators and foam inhibitors are included inthis high viscosity index fluid to enhance performance in hydraulicapplications. AeroShell Fluid 41 is capable of wide temperature rangeoperation.

AeroShell Fluid 41 is dyed red.

APPLICATIONS

AeroShell Fluid 41 is intended as a hydraulic fluid in all modern aircraftapplications requiring a mineral hydraulic fluid. AeroShell Fluid 41 isparticularly recommended where use of a "superclean" fluid can contributeto improvements in component reliability, and can be used in aircraftsystems operating unpressurised between 54C to 90C and pressurisedbetween 54C to 135C.

AeroShell Fluid 41 should be used in systems with synthetic rubbercomponents and must not be used in systems incorporating natural rubber.Refer to the General Notes at the front of this section for furtherinformation.

AeroShell Fluid 41 is compatible with AeroShell Fluids 4, 31, 51, 61 and71 and SSF/LGF.

Chlorinated solvents should not be used for cleaning hydraulic componentswhich use AeroShell Fluid 41. The residual solvent contaminates thehydraulic fluid and may lead to corrosion.

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PROPERTIES MIL-PRF-5606H TYPICAL

U.S. EuropeanProduction Production

Oil type Mineral Mineral Mineral

Kinematic viscosity mm2/s

@ 100C 4.90 min 6.13 5.30@ 40C 13.2 min 15.68 14.1@ 40C 600 max 384 491@ 54C 2500 max 1450 2300

Viscosity index 214 Over 200

Flashpoint, PenskyMartin closed cup C 82 min 104 105

Autoignitiontemperature C 230 230

Pourpoint C 60 max