MIL-PRF-38266D
4.5.4 Leakage test. The tank and pump unit with oil in the supply and overflow tanks shall be
turned upside down before and after the unit has been built up to the operating pressure. There
shall be no evidence of leakage.
4.5.5 Calibrated indicator tests.
4.5.5.1 Overflow tank test. The overflow tank shall be filled with measured quantities of 1, 3, 5,
and 7 quarts. The indicator shall show the amount added to the 1, 3, 5, and 7 quart levels to
within ±0.125 pints.
4.5.5.2 Supply tank test. The supply tank shall be filled to the 3-gallon level as shown on the
indicator. The tank and pump unit shall then discharge oil from the end of the fill nozzle into
graduated containers. The indicator shall show the amount of oil pumped from the supply tank at
the 2, 3, 5, 7, 9, and 11 quart intervals to within ±0.125 pint.
4.5.6. Mobility tests. The unit (see 6.3.2) shall be towed by a vehicle having a pintle height of 10
to 30 inches at an average speed of 5 mph (maximum speed of 7.50 mph) for a distance of 5
miles over a course including right-angle obstructions 0.75 inch to 1.0 inches in height by 1.0 inch
to 2.0 inches in width alternately spaced at 5 and 6-foot intervals at 60º angles to the direction of
travel. At the completion of this test, the unit shall be inspected and there shall be no evidence of
structural damage or loosening of any part of the unit. The unit, with the supply tank full of oil,
shall then be dropped from a height of 1 foot onto a concrete floor until each of the resting points
has impacted three times. The unit shall be inspected after each impact and there shall be no
evidence of structural damage or loosening of any part. At the completion of these tests, the unit
shall be able to dispense 3 gallons of oil in accordance with 3.11 at the 1 gpm at 50 cycles per
minute rate.
4.5.7 Environmental tests.
4.5.7.1 High temperature test. The unit shall be exposed to not less than 160ºF for not less than
48 hours. After that exposure, the temperature shall be reduced to not less than 125ºF. After the
oil temperature in the supply tank has stabilized, the unit shall be removed from the environmental
chamber and immediately the unit shall be able to dispense 3 gallons of oil at the 1 gpm at 50
cycles/minute rate.
4.5.7.2 Low temperature test. The unit shall be exposed to not more than 80ºF for not less than
48 hours. After that exposure, the temperature shall be raised to 40ºF. After the oil temperature
in the supply tank has stabilized, the unit shall be removed from the environmental chamber and
immediately the unit shall be able to develop not less than 300 psi deadhead oil pressure with not
more than 50 pounds exerted on the pump handle then immediately the unit shall be able to
deliver not less than 50 gpm with not more than 50 cycles/minute of the pump handle and with
not more than 50 pounds exerted on the pump handle.
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