MIL-PRF-87257B
6.
NOTES
6.1 Intended use
The hydraulic fluid covered by this specification is intended for use from -54°C to +200°C in
automatic pilots, shock absorbers, brakes, flap-control mechanisms, missile hydraulic servo-
controlled systems, and other hydraulic systems using synthetic sealing material.
6.1.1 Storage conditions
Prior to use in the intended equipment, the product may be stored under conditions of covered
or uncovered storage in geographic areas ranging in temperatures from -57°C to +49°C (-70°F
to +120°F).
6.1.2 Interchangeability
This fluid is completely compatible with MIL-PRF-5606, MIL-PRF-6083, MIL-PRF-46170, and
MIL-PRF-83282 hydraulic fluids. It may be interchangeable with these fluids for some
applications. The selection of the fluids to be used depends on the requirements of the
operational system.
6.1.3
Cleaning agents
6.1.3.1 Chlorinated solvents
Chlorinated solvents should not be used for cleaning hydraulic components. Residual solvent
contaminates the hydraulic fluid and may lead to corrosion.
6.1.3.2 Recommended solvents
The recommended solvents are MIL-PRF-680, Type II, A-A-59601, Type II, or other petroleum
distillate type solvents.
6.1.4 Oil red dye source
"Oil red 235" is manufactured by Passaic Color and Chemical Company. For more information
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