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|  MIL-T-45380E(AT)
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3.4.11.3 Trailer brake control system. In addition to components specified in 3.4.11.2
and 3.4.11.2.1, when specified (see 6.2), a trailer brake control system shall be furnished. The
trailer brake control system shall include:
(a)
Identification of emergency and service lines
(b)
Coincident control of trailer brakes with prime mover foot control
(c)
Independent hand control for trailer brakes
(d)
Prime mover protection valve with dash control and automatic breakaway feature
(with air brakes)
(e)
Trailer stoplight control operative with foot brake and with hand control for trailer
brakes
(f)
Two SAE J844 coiled air hoses, not less than 110 inches long, with SAE J318
gladhand couplers on both ends of the hoses. The hoses shall be packaged and
stowed in the vehicle tool compartment for shipment
(g)
Air connectors for trailer with SAE J318 gladhand couplers mounted at the rear of
the vehicle, located to prevent interference with the trailer
(h)
Dummy gladhand couplers with chains
(i)
Prime mover only parking brake valve to permit truck parking brakes to be applied
while charging the trailer air brake system (with air brakes).
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3.4.11.4 Brake control for use from a towing vehicle. When specified (see 6.2), the
vehicle shall be furnished with a system for controlling the brakes from a towing vehicle
(wrecker). The installation shall be complete with air brake couplers, a relay emergency valve
with no-bleed-back feature (except when spring applied emergency brake is furnished), and
additional air lines and fittings. The service and emergency couplers shall be mounted on the
front in a protected position providing for ready attachment of air hoses from a towing vehicle.
The service and emergency couplers shall be identified and provided with dummy gladhand
couplers with chains. The system shall not compromise conformance to any Federal Motor
Carrier Safety Regulation referenced herein or to any Federal Motor Vehicle Safety Standard.
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3.4.12 Cab. Unless otherwise specified, the chassis manufacturer shall furnish any type
of his standard or optional full width cab. When specified (see 6.2), a cab with a forward tilting
hood and fender assembly, including tilting and locking mechanism; or a vehicle with a butterfly
hood and with bolt on fenders capable of being removed or swinging forward when Unbolted;
shall be furnished. Cab doors shall be equipped with locks, operable from inside the cab through
mechanical linkage, and with at least the curbside door equipped with external, key-operated
lock. Full length drip rails shall be installed above the cab doors.
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