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Brake controls for use from a towing vehicle |
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|  MIL-T-11663K
* 3.4.11.2 Air dryer. A replaceable cartridge desiccant type air dryer shall be installed in the air
brake system. The dryer shall have the capability of removing not less than 95 percent of the
moisture in the air being dried. The dryer shall have a pre-cooler and a filter to screen out oil and
solid contaminants. The dryer shall have an automatic self-cleaning cycle and a thermostatically
controlled heater to prevent icing of the purge valve.
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, a relay emergency valve with no-bleed-back
feature (except when a 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.
* 3.4.12 Cab. Unless otherwise specified, the chassis manufacturer may 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 mechanisms, shall be furnished. When specified
(see 6.2), a tilt type cab with a tilting and locking mechanism shall be furnished. Tilt cab features
shall be in accordance with the Employee Safety and Health Standards of Federal Motor Carrier
Safety Regulation 399, including the first step height, which shall be not more than 24 inches.
The cab doors shall be equipped with locks, operable from inside the cab through mechanical
linkage, with at least the curbside door equipped with an external, key-operated lock. Drip rails
shall be installed above the cab doors. Unless otherwise specified, the cab shall have an
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
individual passenger seat shall be provided. The color of the upholstery and the interior finish
shall be compatible with the exterior color (see 3.1.1.1). White upholstery shall not be furnished
interior lighting shall be provided. Two pairs of seat belts shall be installed. Safety grips or grab
handles shall be provided on each side of the cab to assist personnel in entering and leaving the
cab. For tilt type cabs, provisions to facilitate cleaning the windshield shall be provided by means
of a bumper step, or bumper step cutouts, and a grab handle located under the windshield.
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