NPFC - MIL-PRF-87257
HYDRAULIC FLUID, FIRE RESISTANT; LOW TEMPERATURE, SYNTHETIC HYDROCARBON BASE, AIRCRAFT AND MISSILE
|Publication Date:||8 December 1997|
This specification covers the general requirements for a synthetic hydrocarbon base hydraulic fluid for use in the −54°C to +135°C temperature range in aircraft and missile hydraulic systems. This hydraulic fluid is identified by NATO Code No. H-538 (see 6.5).
The hydraulic fluid covered by this specification is intended for use from −54°C to +135°C in automatic pilots, shock absorbers, brakes, flap-control mechanisms, missile hydraulic servo-... View More
The hydraulic fluid covered by this specification is intended for use from −54°C to +135°C in automatic pilots, shock absorbers, brakes, flap-control mechanisms, missile hydraulic servo- controlled systems, and other hydraulic systems using synthetic sealing material.
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).
This fluid is completely compatible with MIL-H-5606, MIL-H-6083, MIL-PRF-83282 and MIL-PRF-46170 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.
Chlorinated solvents should not be used for cleaning hydraulic components. Residual solvent contaminates the hydraulic fluid and may lead to corrosion.
The recommended solvents are P-D-680, type II (Stoddard solvent) or other petroleum distillate type solvents.
"Oil red 235" is manufactured by Passaic Color and Chemical Company.View Less