Front and rear intervehicular connections.

Page Title: Front and rear intervehicular connections.
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MIL-C-52128C

stationary with respect to the crusher during all transport operations. The adaptor shall be

equipped with positive manually operated locks and fasteners and with operational instructions

that shall permit two men to install and remove the adaptor with common tools in not more than

1 hour. Retaining brackets shall be provided on the crusher for stowing the auxiliary fifth wheel

adaptor when not in use.

3.14.1.2 Rear towing components. Towing components shall be furnished on the rear of the

semitrailer as specified and in accordance with SAE J849 for doubles trailer application, except

as specified herein.

3.14.1.3 Front and rear intervehicular connections. The semitrailer shall be furnished with

airbrake couplings specified in 3.14.5 and electrical receptacles specified in 3.14.6 for

connecting (1) the truck-tractor to the semitrailer, (2) the dolly to the semitrailer and (3) other

trailers to the semitrailer. The front connections shall comply with SAE J702 and the rear

connections with SAE J849. Service brake couplings shall be on the curb side, color coded blue,

and emergency brake couplings shall be on the road side, color coded red. Clearance about the

couplings and receptacles shall allow operating personnel to connect the truck-tractor, or dolly

hoses and harness to the semitrailer, and from the semitrailer to towed trailers without

interference with other components. Each airbrake coupling shall be protected with a

spring-type, metal, dust cover. The front electrical receptacle shall have leads terminating within

a waterproof, electrical, semitrailer-type commercial nosebox or junction boxes.

3.14.2 Rear suspension. The rear of the semitrailer shall be mounted on single wide base

wheel and tire, multiple-axle suspension system. The suspension manufacturer's rated capacity

of the suspension assembly shall be not less than the loading imposed on the suspension,

measured at the ground, with all components of the crusher assembled for rock crushing

operation. The suspension shall be of the equalizing type, shall be equipped with elastomer

bushings or blocks that eliminate the need for lubrication, shall have elastomer bumpers at the

limit of articulation, and shall provide freedom from brake hop. Each axle shall be rated by the

axle manufacturer at a commercial highway usage, capacity rating of not less than 25,000 pounds

and shall be loaded for this application not to exceed that specified in 3.14 when measured at the

ground. Bearing cones, bearings, and bearing cups shall be furnished by the same bearing

manufacturer. The suspension shall be in correct alinement with the frame and with the axles so

that the diagonal measurements from the true center of the kingpin to the outer center of each

spindle on the axle do not differ in excess of 1/8 inch for every 20 feet or fraction thereof in

diagonal distance. Each subsequent axle shall be parallel to the front axle of multiple axle

suspensions such that the axle wheelbases on each side do not differ in excess of 1/8 inch. Axle

alinement measurements specified herein shall be made in accordance with SAE J875 or by other

methods of equal accuracy. Multiple axle wheelbases shall be not less than 50 inches center-to-

center. Suspension mounts shall be installed on the frame and the axles in accordance with the

suspension and axle manufacturer's recommendations.

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