FED-STD-791 Lubricants, Liquid Fuels, And Related Products, Testing Method OfThis test method standard is composed of standard test methods for sampling, inspecting and testing lubricants, liquid fuels and related products. It is issued pursuant to the Federal Property and Administration Services Act of 1949, as amended and its application to the purchase of commodities referred to herein is mandatory on all Federal agencies.

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'�NOTE:This draft dated 15 April 2006' by DasH - Page 60 of 460

FED-STD-791D

j. Degree (slight, moderate, or excessive) of sludging, jelling, sedimentation, or grittiness

of the fluid after testing (see 6.2.2).

k. Observed improper functioning of the wheel cylinder pistons.

9. PRECISION

9.1 Duplicate test runs should show the same general trend for a given hydraulic brake

fluid, particularly in the matter of leakage during and after test, excessive increase in the stroking

pressure, and improper functioning of the wheel cylinder pistons.

9.2 The test shall be repeated using new parts if mechanical difficulties, which cannot be

attributed to the fluid proper, are encountered during the test.

Method Prepared By:

Army - ME - 1986