MIL-DTL-62461E(AT)
4.4.3 Operating requirements verifications. Complete and pass each of the tests as
specified in 4.4.3.1 through 4.4.3.3.
4.4.3.1 Output speed. The transmission shall be tested on a test stand and operated under
the input speed and gear ranges as specified in table I. The minimum output speeds shall be as
specified therein.
4.4.3.2 Oil pressure and flow. The transmission shall be tested on a test stand with
provisions for providing the no-load speed, gear shifting, observation of flows and pressures, and
oil supply at the temperature indicated in table II. The transmission shall attain the oil pressures
and flows as indicated in table II and shall show no evidence of leakage in excess of a seep
(see 6.5). When first article inspection is required (see 6.2), the transmission shall be capable of
operating with converter output temperatures of up to 250°F (121°C) on a continuous basis, and
up to 280°F (138°C) on an intermittent basis during a period of not more than 15 minutes.
Normal acceptance testing shall be accomplished with the converter-output temperature in the
range of 180-220°F (82-104°C).
4.4.3.3 Seals test. Visually verify that the seals have restricted the entrance of all foreign
material into bearings exposed to contamination, and have prevented lubricant leakage and water
contamination of lubricants during transmission operation.
4.4.4 Support and ownership requirements verifications. Complete and pass each of the
tests as specified in 4.4.4.1 through 4.4.4.3.
4.4.4.1 Durability test. The transmission shall be tested in a way that is commensurate
with the mission profiles of the M9 series tanks as specified in MIL-V-62468. The transmission
shall demonstrate a 50% probability of completing the first 600 hours of operation without
replacement, rebuilding or overhaul, when calculated with the grading scale as specified therein.
4.4.4.2 Finish test. Visually verify that the transmission is cleaned, treated, primed and
painted in accordance with acceptable commercial standards, and that all parts exposed to
chemical contaminants are painted with coatings conforming to MIL-PRF-22750, MIL-C-46168,
and MIL-C-53039, as applicable.
4.4.4.3 Identification marking. Visually verify that the transmission and each major
component is permanently and legibly marked with an identification plate that includes the
following information:
a.
National stock number (NSN).
b.
Manufacturer's serial number.
c.
Manufacturer's name and CAGE code.
d.
U.S.
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