KKK-B-1579B
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4.3.1 Radio frequency suppression verification. The vehicle manufacturer shall indicate
on the questionnaire (vehicle commercial engineering data) if the vehicle will be suppressed to
limit electromagnetic radiation in accordance with SAE J551.
4.3.2 Vehicle weight. The first production vehicle shall be weighed to determine curb
weight and the distribution of curb weight on the front and rear axles. The imposed loading of
front and rear axles will be computed using the curb weight and the payload, uniformly
distributed over the vehicle load area, to provide the specified GVW. Calculated imposed loads
on front and rear axles will be utilized to ascertain that the suspension, axles, and tires furnished
are of adequate capacity to meet contractual requirements.
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4.3.3 Road test. The first production vehicle will be examined and road tested less
payload by the contractor to assure that the vehicle will operate in accordance with the contract
requirements.
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4.3.3.1 Road test details. Unless otherwise specified (see 6.2), the first production
vehicle of each type provided under the contract shall be road tested, less payload, on highways
and roads for a distance of not less than 100 miles.
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4.3.4 Heater certification. The contractor shall furnish certification that the heater
conforms to the Btu requirements of 3.5.10.1.
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4.3.5 Wood treatment certification. Manufacturer's records, acceptable to the
Government, shall be furnished to verify that all wood requiring treatment in accordance with
MIL-STD-1223 has been treated.
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4.3.6 Air conditioning. For buses with air conditioning, to verify conformance to the air
conditioning performance requirements specified in 3.5.13, the manufacturer shall test the
vehicle under actual or simulated conditions at least as stringent as specified herein. Simulated
conditions shall be acceptable to the Government. Inside temperature may be calculated either
with the specified number of seated passengers, or the use of simulated heat, for sensible cooling.
Solar radiation may be employed or simulated by calculating solar load effective in Btu, based
on the square foot surface and the angle of, incidence that will be exposed to the sun at the same
time.
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4.3.7 Production sample. Upon acceptance of the first production vehicle, it shall remain
at the manufacturing facility as a production sample, and be the last vehicle shipped on the
contract. The contractor shall maintain the vehicle in a serviceable condition for the duration of
the contract.
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