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Table II. Maximum acceptable level for continuous noise |
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|  MIL-T-45379D(AT)
TABLE II. Maximum acceptable level for continuous noise.
Octave band center
Maximum acceptable noise level
Frequency (Hz)
(db ref. 0.0002 microbar)
121
63
111
125
103
250
102
500
100
1000
100
2000
100
4000
100
8000
3.3.10.2 Operator's protection. Noise hazard caution signs shall be posted in all crew
stations. The signs shall be clearly visible to all personnel (see 4.6.2.10).
3.3.11 Hull.
3.3.11.1 Cooling system. With the vehicle operating in an ambient temperature of 115F,
the engine oil temperature shall not exceed 250F at the heat exchanger outlet, and the
transmission oil temperature shall not exceed 300F at the heat exchanger inlet (see 4.6.2.11.1
and 4.7.1).
3.3.12 Fuel system.
3.3.12.1 Fuel tanks, and lines cleanliness. Provisions shall be made to assure the internal
cleanliness of the fuel tanks and lines prior to initial fueling of vehicle. The fuel tanks shall be
free from leakage (see 4.6.2.12.1).
3.3.12.2 Heater fuel feed. With either of the fuel system pumps and the heater pump
operating, the vehicle fuel system shall produce a pressure not less than 7 pounds per square inch
(psi) at the outlet of the heater pump line (see 4.6.2.12.2).
3.3.12.3 Fuel shutoff valve. The engine shall stop firing and rotating within 30 seconds after
the manual fuel shut-off valve is actuated to the OFF position (see 4.6.2.12.3)
3.3.12.4 Fuel system (slope). During engine operation, the fuel system shall maintain fuel
supply to the engine when ascending and descending 60 percent grades in forward and reverse
gear, and when the vehicle is being operated on 30 percent side slopes, with either side of the
vehicle up slope (see 4.6.2.12.4).
3.3.12.5 Fuel tank (rapid fill). The fuel tanks shall be capable of receiving 50 gallons of fuel
per minute (see 4.6.2.12.5).
6
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