MIL-PRF-46170 Hydraulic Fluid, Rust Inhibited, Fire Resistant, Synthetic Hydrocarbon Base, Nato Code No. H-544This specification covers the requirements for one type of synthetic hydrocarbon base hydraulic fluid \(see 6.1\) for use in the -40 degrees C to 200 degrees C temperature range in recoil mechanisms and ground vehicle and equipment hydraulic systems. This hydraulic fluid will not be used for aircraft systems, aircraft ground support equipment, or the preservation of aircraft components.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12

MIL-PRF-46170E

4. VERIFICATION

4.1 Classification of inspection.

a. Qualification inspection (see 4.2)

b. Conformance inspection (see 4.3)

4.2 Qualification inspection.

4.2.1 Qualification inspection sample. Qualification samples shall consist of a one (1)

gallon container of hydraulic fluid. The qualifying activity may request samples of the basestock

and additives used in the formulation. The qualifying activity will request data as listed in

TARDEC s Guide for Qualification of Hydraulic Fluids, Greases, Solid Film Lubricants,

Solvent, Preservatives, & Stabilizer Additives.

4.2.2 Qualification tests. Qualification sample(s) shall be subjected to all tests specified

in Section 3 and Tables I and II.

4.2.3 Retention of qualification. The government reserves the right to re-examine the

qualified product whenever deemed necessary to determine that the product continues to meet

any or all of the specification requirements. Requalification is required every 5 years. Changes

in formulation or materials shall require requalification.

4.3 Conformance inspection. When manufactured for the fulfillment of military

contracts, the hydraulic fluid shall use the same base stocks and additives, at the appropriate

concentrations, as when qualified. Satisfactory performance shall be demonstrated when oils are

tested in accordance with 4.3 and the finished oil properties fall within the permissible

tolerances. Conformance tests shall consist of tests for all of the requirements specified in

Section 3 except the following:

Bulk modulus

High temperature-high pressure spray ignition

Linear flame propagation

Corrosiveness and oxidation stability

Compatibility

Storage stability

4.4 Sampling.

4.4.1 Sampling for examination of filled containers. Random samples of filled

containers shall be taken from each packaged lot.

4.4.2 Sampling for tests (except particle size). Samples of hydraulic fluid for all tests

except particle size shall be taken IAW ASTM D4057 or D4177.