MIL-S-62549(AT)
In addition, the connection between circuit 2 and 6, on the 7 pin connector, shall have a readily accessible external switch to allow for breaking of this circuit when the 7 pin connector is attached to the towing tractor in lieu of the 12 pin MS connector. Circuits b and j on tactical
truck tractors are combination stop and turn signal indicator circuits. The normal 12 V turn signal lights will function both as turn signals and stop lights and the normal 12 V stop lights will not be in operation when the semitrailer is connected to a towing vehicle with a 24 V power supply. Because of this condition., the number 4 stop light circuit is not connected to the 24 V, 12 contact receptacle.
3.4.17 Transportability. The semitrailer shall be capable of being transported by rail, air and marine modes worldwide. The applicable transportability criterion is set forth in MIL-STD-1366. Preparation of the semitrailer to be transported by any mode shall be accomplished in 15 minutes (min) (total) or less by no more than two individuals using only tools on board. Storage on the vehicle shall be provided for all parts removed from the semitrailer.
3.4.17.1 Slinging provision. The semitrailer shall be equipped with lift points to permit slinging a fully loaded semitrailer in accordance with class 1 or 3, type II of MIL-STD-209.
3.4.17.2 Rail impact. The fully loaded semitrailer shall withstand rail impact testing in accordance with MIL-STD-810, method 516, procedure VIII without any damage or degradation in performance.
3.4.17.3 Air transport. The semitrailer shall be air transportable by the C130 aircraft in accordance with the criterion set forth in MIL-A-8421.
3.4.17.4 Vehicle tiedown. The semitrailer shall be equipped with a minimum of eight tiedowns on each side, and each tiedown shall be capable of withstanding a load of not less than
45,000 lb without failure or permanent deformation when the load is applied at an angle up to 45° from the longitudinal axis. Tiedown hardware to permit transportation of the vehicle in accordance with Type II, Class 2 of MIL-STD-209 shall be provided. Instruction shall be included for component removal when required for transport. The tiedown procedure shall
permit tiedown of the vehicles to the floor (or deck) of the transport medium in such a manner as to prevent shifting or movement in any direction.
3.4.17.5 Lashing rings. Minimum 16 each, D-rings recessed around the perimeter of the semitrailer; two on gooseneck, two on the deck top at the rear of the load bed, and the remaining equally spaced on each side of the frame including suspension area. Each D-ring shall be of manufacturers heavy duty type. The tiedown provisions will permit securement of equipment in accordance with MIL-STD-209, for Type II equipment and Class 5 cargo tiedown provisions.
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