MIL-HDBK-134A
15 October 1965
4.1.9.14 Inter-vehicular brake connections. Suitable provisions should be made for transmitting
air pressure, or other medium for service brake operation, from prime mover to towed vehicle, where
applicable. Receptacles should be provided on pintle-equipped trucks and truck tractors, and hose or other
suitable means for connection to such receptacles should be provided on track tractors.
4.l.9.14.1 Air-over-hydraulic. Trucks equipped with air-over-hydraulic or air brakes should
include suitable provisions for connecting to the brake system of another truck, at front and rear, for
controlling brakes of a truck being towed by another truck during emergency operation.
4.1.9.l4.2 Brake hose. Brake hose (or cable) should be of adequate length so as to not restrict
maneuverability of the prime mover or towed vehicle when coupled together under any applicable
conditions. Suitable provision should be made to prevent kinking entanglement dragging abrasion or
pinching of the brake lines.
4.1.9.14.3 Receptacles. Receptacles for connecting brake lines should be located not more
21inches from the axis of the pintle, nor more than 15 inches from the axis of the semitrailer.
4.1.9.15 Stowage. Suitable compartments, brackets, or other provision should be included to
accommodate storage of tools and other required vehicular equipment.
4.l.9.16 Winch. When specified, front-mounted winch should have a capacity approximately
equal to curb weight of vehicle, and cable of length not less than 150 feet. Winch should be designed with
suitable safety features.
4.1.9.17 Lower fifth wheel. Lower fifth wheel should be Army standard type, providing both
lateral and longitudinal oscillation. Truck tractors and dollies for towing semitrailers less than 20-ton
capacity should have fifth wheel to fit 2-inch kingpin. Truck tractors for towing semitrailers of 20-ton
capacity and larger should have heavy-duty fifth-wheel to fit 3 1/2 inch kingpin.
4.1.10 Maintenance.
4.1.10.91 Simplicity. Simplicity of design is necessary to assure ease of servicing, adjustment,
repair and parts replacement under field conditions in the minimum practicable time, requiring the lowest
possible degree of skills and variety and complexity of tools and equipment.
4.1.10.2 Accessibility. Components should be so located and installed as to permit ready removal
and replacement without requiring removal of other components or control parts, which otherwise need not
be removed. Special emphasis should be placed on accessibility for Organizational and Field Maintenance
of those components and parts which am subject to wear, adjustment or replacement. Grease and oil seals
and fittings, and fastening devices such as bolts, nuts and screws, should be readily accessible.
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