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|  MIL-T-62531(AT)
APPENDIX A
Verification Rationale
Vehicles shall be capable of maintaining sustained speeds on relatively level paved roads.
Rapid deployment of material is essential. Peacetime use of expressways mandate high
sustained speeds.
Verification Guidance
Insert the data for distance to be tested and the speed to be attained. Verify that vehicles are
properly loaded with the rated payloads as specified, and that the vehicles have been adjusted for
optimum performance.
Verification Lessons Learned
3.7.2.2 Low speed. The vehicle with its rated payload and towed load shall be capable of
operating at a sustained low speed of ______ km/h without causing any damage to the vehicle.
Rationale
When the vehicle is in the speed range wherein the engine is operating at maximum torque,
the lubrication and cooling systems are functioning under extreme performance conditions. The
oil pumps and liquid cooling pumps are operating at relatively low revolutions per minute (rpm)
and therefore bearings and other moving parts i.e., pistons are receiving minimal lubrication and
cooling. Failures of components during this mode of operation are usually higher than at normal
to high speed operation.
Guidance
Insert the figure for the low speed operation. Proper oil and coolant levels must be
maintained to lessen the element of component failure.
Lessons Learned
4.7.2.2 Low speed verification. With the engine operating in the speed range which delivers
maximum torque, the vehicle with its rated payload and towed load shall operate at a sustained
low speed of not more than ______ km/h without damage to the vehicle, for not less than
______ km and/or ______ minutes.
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