MIL-PRF-83282D
4.2 Qualification inspection. The qualification inspection performed by the qualification
laboratory (see 6.4) shall consist of a review for approval of the submitted manufacturer's test
report and item composition report and subjecting the qualification test sample to examination and
testing to determine conformance to all of the requirements specified in section 3. The
qualification test sample consists of two 1 gallon containers of the finished fluid, two quarts of the
base stock without additives, two quarts of the blending fluids used, eight ounces of the anti-wear
additive, one ounce of the oxidation inhibitor and one ounce each of any additional additives used
in the finished fluid. In the event that the additives are supplied as concentrated solutions, an
equivalent quantity of the solution is to be furnished. A separate qualification inspection is
required for each base stock used. The samples are to be clearly identified (see 6.4.2).
4.2.1 Requalification. Requalification shall be required when any reformulation or change is
made in source of manufacture, purity, or composition of the hydraulic fluid base stock or
additives. A minor change in a qualified product's formulation may be made without
requalification testing upon approval by the qualification activity (see 6.4).
4.3 Conformance inspection. The conformance inspection shall consist of tests to verify
conformance to the following requirements: barium content, color of finished fluid, evaporation,
fire point, flash point, foaming characteristics, low temperature stability, lubricity, neutralization
number, pour point, solid particle contamination, specific gravity at 15.6°C/15.6°C, viscosity
(finished fluid), water content (see tables II and V). Unless otherwise specified by the procuring
activity, sampling of the hydraulic fluid shall be in accordance with 4.3.3 and 4.3.4. Inspection
shall be in accordance with FED-STD-791, Method 9601.
4.3.1 Bulk lot (batch). A bulk lot (batch) is an indefinite quantity of a homogeneous mixture
of material offered for acceptance in a single isolated container; or manufactured in a single plant
run (not exceeding 24 hours) through the same processing equipment, with no change in
ingredient material.
4.3.2 Packaged lot. A packaged lot is an indefinite number of unit containers of identical
size and type, offered for acceptance, and filled with a homogeneous mixture of material from one
isolated container; or filled with a homogeneous mixture of material manufactured in a single
plant run (not exceeding 24 hours) through the same processing equipment, with no change in
ingredient material.
4.3.3 Sampling for tests. Sampling for tests shall be conducted in accordance with
ASTM-D4057 or ASTM-D4177. Failure of any conformance test shall result in rejection of the
lot. In addition, a random sample of base oil shall be selected for each lot of the finished fluid and
subjected to all the applicable conformance tests for base oil.
4.3.4 Sampling for solid particle contamination. Samples of filled and sealed containers shall
be taken at periodic intervals to be representative of each day's production, in accordance with
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