MIL-S-62127 Semitrailer, Compressed Gas Cylinder: Helium, CommercialThis specification covers a commercial semitrailer for storing, transporting, and charging compressed helium gas. The tandem axle semitrailer mounts 38 cylinders having a combined water capacity of not less than 340 cubic feet and a design working pressure of at least 2400 pounds per square inch gage psig. Semitrailer procured under this specification are commercial items which shall be warranted as specified in the procurement documents.

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MIL-S-62127A(AT)

3.6.9.1 Rear wheel splash and stone throw protection. Rubber mud flaps to the rear of the rear wheels, in accordance with SAE J682, shall be provided.

* 3.6.9.2 Lubrication. Lubrication means shall be provided for all parts of the equipment normally requiring lubrication. Where the use of high lubrication pressure will damage grease seals or other parts, fittings with pressure release shall be used.

3.7 Electrical equipment.

* 3.7.1 Lighting. The lighting system shall be of 12-volt potential and shall conform to Federal Motor Carrier Safety Regulations 393.14, 393.20, 393.22, 393.23, 393.25, and 393.26. All lights and reflectors shall be protected from operational hazards by mounting in recessed or otherwise guarded locations. Lights and reflectors shall not be mounted on vertical surfaces of the rub rails (unless recessed and fully protected) or semitrailer bumper. The front of the semitrailer shall be equipped with a receptacle conforming to SAE J560 with the conductors connected and color coded as specified therein. The receptacle shall be located in accordance with SAE J702. Clearance lights shall be constructed for easy removal and replacement of lamps and lenses without the use of hand tools. Turn signal lamps shall conform to SAE J588.

* 3.7.2 Independent 24-volt dc system. When specified (see 6.2), a 24-volt dc lighting system independent of the 12-volt dc lighting system shall be provided for use with a towing vehicle equipped with a nominal 24-volt dc system. Separate wiring and bulbs shall be provided for the 24-volt dc system. The system shall conform to 3.7.1. The 24-volt dc system shall conform to the Federal Motor Carrier Safety Regulations referenced herein, except the 24-volt dc stop and turn lamps shall be combined.

* 3.7.2.1 Interconnected 24-volt dc system. When specified (see 6.2), capability of operating the 12-volt-dc system (see 3.7.1) from a towing vehicle equipped with a nominal

24-volt dc electrical system shall be provided.

* 3.7.2.2 Receptacle, 24-volt dc. When either an independent or interconnected 24-volt dc system is specified, the front of the semitrailer shall also be equipped with a 12-contact

receptacle and cover conforming to MS75021, part number MS75021-1. The receptacle shall be located in accordance with SAE J702. The 24-volt dc, 12-contact receptacle shall be connected

to the lights as follows: