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|  MIL-T-62357A
4.3.2 Leakage test. Each completely assembled tank body, including all piping, shall be
tested for leaks at its design pressure in accordance with DOT Regulation 178.345. The tank of
the first production vehicle shall be tested for leaks both before and after the road test.
* 4.3.3 Road test. The first production vehicle shall be road tested, with and without payload,
by the contractor to assure the vehicle will operate in accordance with contractual requirements.
Unless otherwise specified (see 6.2), the road test shall be for a distance of 100 miles. Half the
mileage shall be accomplished with the trailer fully loaded and half shall be with the trailer empty.
Approximately half the mileage shall be on paved streets or highways at speeds up to
55 mph and half shall be on gravel or dirt roads at speeds up to those deemed safe. At least five
sudden stops shall be made from a speed of not less than 20 mph. Tracking ability shall be
observed to verify conformance to 3.3.1; turning ability shall be observed to verify conformance
to 3.3.2. After the test the trailer shall be examined for evidence of misalinement, binding or other
malfunction. The test course shall be arranged so as to return the vehicle to the manufacturer's
plant at the completion of the test for reinspection and chassis servicing. All costs of the test,
including all costs for the towing vehicle, exclusive of personal expenses incurred by participating
Government representatives, shall be borne by the contractor.
* 4.3.4 Test failure. The vehicle shall successfully complete the entire test. Failure of the
vehicle to successfully complete the test shall be cause for nonacceptance of any of the contract
quantity, pending correction of deficiencies and evidence of corrective action which shall prevent
the recurrence of similar deficiencies in the contract quantity. Failure of the vehicle to
successfully complete the tests shall not constitute an excusable delay in meeting scheduled
deliveries. The equipment shall be closely monitored throughout the test for interference with
towing operations, and for instability as evidenced by poor tracking or uncontrollable sideslipping,
skidding, swerving, or tilting. The equipment also shall be closely monitored for loosening of
parts, interference between parts, leakage of fluids or lubricants, overheating of components, and
for damage, permanent distortion, or excessive wear of parts and components. The equipment
shall be disassembled to the extent necessary for inspection for unusual wear or damage to
components. Substitution of a new trailer or replacement of a major component may require
complete retest at the discretion of the Government representatives. Rejection of the test trailer
shall be for damage or deficiencies, including but not limited to the following:
(a)
Damage caused by collision
(b)
Failure of any major component
(c)
Vibration due to misalinement of wheels or frame
(d)
Vibration due to the type of construction or mounting
(e)
Evidence of abnormal tire wear due to misalinement or unbalance
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