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|  MIL-T-45379D(AT)
4.6.2.10 Noise hazard. To determine conformance to 3.3.10.1 and 3.3.10.2, the average of
three noise level readings at each octave band shall be determined at each operator's head
position under normal operating procedures. The sound level meter, microphone-related
equipment and techniques employed shall be in accordance with definition per MIL-STD-1474.
Verify that the noise hazard signs are clearly visible to personnel in all crew stations.
4.6.2.11 Hull.
4.6.2.11.1 Cooling system. Conformance to 3.3.11.1 shall be determined during acceptance
inspection by observing the engine and transmission oil temperature indicators on the driver's
panel at all stages of vehicle operation. With the vehicle operating at ambient temperature,
observe the engine and oil temperature indicators on the driver's panel. Verify that the
temperature indicators remain in the green area during all stages of vehicle operations as
specified in 3.3.11.1.
4.6.2.12 Fuel system.
4.6.2.12.1 Fuel tanks and line cleanliness. Provisions shall be made to assure the internal
cleanliness of the fuel tanks and lines prior to initial fueling of vehicle. No leakage of fuel tanks
and/or lines is acceptable.
4.6.2.12.2 Heater fuel feed. With either of the fuel system pumps and the heater pump
operating, the fuel system shall produce a minimum of 7 psi at outlet of the heater pump line.
4.6.2.12.3 Fuel shutoff valve. To determine conformance to 3.3.12.3, with the engine
operating at 2000 to 2200 rpm, the fuel shutoff handle shall be actuated to the OFF position; the
engine shall stop operating within the time specified. The test shall be repeated placing the fuel
shutoff switch in the OFF position; the engine shall stop operating within the time specified.
4.6.2.12.4 Fuel system (slope). To determine conformance to 3.3.12.4, the vehicle shall be
driven up and down 60 percent grades without loss of fuel supply to the engine. Perform this
inspection in conjunction with 4.6.4.3.4 and 4.6.4.3.5.
4.6.2.12.5 Fuel tank (rapid fill). To determine conformance to rapid fill requirements of
3.3.12.5, the tank shall be filled at a rate of not less than 50 gallons per minute, and observed for
leaks before and after a road test on smooth, level, hard-surfaced road.
4.6.2.13 Hatches.
4.6.2.13.1 Driver's hatch. To determine conformance to 3.3.13.1, a force gage shall be
attached to the driver's hatch when it is in the closed position and the hatch shall be pulled to the
open position and back to the closed position. The force shall be as specified. With the hatch in
a closed position, the force required to lock the driver's hatch cover shall be measured with a
force gage attached to the end of the locking lever and shall be as specified.
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