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|  MIL-T-46797B(AT)
3.4.11.2 Trailer brake control system. In addition to the components specified in
3.4.11.1, a trailer brake control system shall be furnished when a trailer towing package is
required (see 3.1.1.9). 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
(e)
Trailer stoplight control operable with foot brake and with hand control for trailer
brakes
*
(f)
Two SAE J844 coiled, air hoses, not less than 110 inches long when fully extended,
with SAE J318 gladhand couplers on both ends of 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 preclude interference with trailer
(h)
Dummy gladhand couplers with chains
(i)
Prime mover only, parking brake valve to permit prime mover parking brakes to be
applied while charging the trailer air brake system.
3.4.11.3 Brake controls 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, relay emergency valve
with no-bleed-back feature (except when spring applied emergency brake is furnished),
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.
3.4.12 Cab. The manufacturer may furnish any standard full-width non-tilting model cab
for the vehicle. Cab doors shall be equipped with locks, operable from inside the cab through
mechanical linkage, with at least the curbside door equipped with external, key-operated lock.
Drip rails shall be installed above the cab doors. Unless otherwise specified, the cab shall have
upholstered, full-width, adjustable seat and back or individual, adjustable, driver's seat and
individual passenger seat. When specified (see 6.2), an individual, adjustable driver's seat and an
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