MIL-S-62294 Semitrailer, Stake: Two Level Decks, With Hydraulic Loading Ramp, 20 Ton, Modified CommercialThis specification covers a commercial, 20 ton stake semitrailer with upper gooseneck and lower main decks and a tandem axle. The semitrailer is fitted with a kickup gooseneck deck, lower main deck, hydraulic rear loading ramp, hydraulic winch, and an auxiliary engine. The semitrailer is intended for transporting cargo, fork lift trucks, and fork lift trucks with cargo. Each vehicle produced under this specification is a commercial item which is warranted by the manufacturer as specified in acquisition documents.

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MIL-S-62294B(AT)

* 3.11.4 Carrier for snare tire assembly. When specified (see 6.2), a carrier for a spare wheel or rim and tire assembly shall be installed in a readily accessible location on the vehicle. Threaded fasteners, when used to secure the spare tire in the carrier, shall be constructed of or plated with corrosion-resistant material. The carrier design shall enable safe removal or mounting of a spare wheel assembly using only the tools specified in 3.20. The carrier shall enable the safe removal and installation of the spare tire assembly from and to the vehicle and carrier without personnel positioning themselves or any part of their body under the spare tire assembly.

3.12 Service brakes. The brakes shall be of the full-air, internal expanding type and shall conform to Federal Motor Carrier Safety Regulations 393.40, 393.42, 393.43 and 393.45 through

393.47. The braking system shall include standard breakaway features, relay emergency valve,

air reservoirs, automatic slack adjusters, piping, hose connections, gladhands, spring loaded dust covers or dummy gladhands equipped with security chains, and all other components required

for a complete air brake system. The gladhands shall conform to SAE J318. The location of the gladhands shall comply with SAE J702. The braking system shall be installed in a manner

which provides road clearance for travel over uneven terrain and protection against damage caused by objects striking the components. No part of the braking system shall extend below the

bottom of the wheel rims. The air reservoirs shall be of sufficient capacity to supply air for the air brakes and the complete control system of the semitrailer, with an adequate reserve capacity.

* 3.12.1 Parking brakes. The semitrailer shall be equipped with spring or air diaphragm mechanical lock type parking brakes. The parking brakes shall hold the semitrailer, with rated payload, on a 10 percent grade despite the depletion of the compressed air supply. With no additional application, the parking brakes shall hold the semitrailer, with rated payload, on a

10 percent incline with the semitrailer headed first up and then down the incline. The parking

brake shall be automatically applied upon disconnection of the emergency air line and under emergency conditions. The parking brakes shall conform to Federal Motor Carrier Safety Regulation 393.41.

* 3.13 Upper fifth wheel. The upper fifth wheel plate shall completely cover a 36 inch diameter lower fifth wheel when the lower fifth wheel is coupled to the kingpin of the upper fifth wheel and turned at all angles with the semitrailer. The upper fifth wheel shall conform to Federal Motor Carrier Safety Regulation 393.70(b).

* 3.13.1 Upper fifth wheel plate. The upper fifth wheel plate shall be not less than 0.375 inch thick. It shall be reinforced on the upper surface through the use of commercial steel angles, channels, and ribs and shall include an access hole to permit servicing the brake connections and coupling sockets.