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|  MIL-T-62145E
(f)
Low-air-pressure warning, visible and audible
(g)
Automatic moisture ejector
(h)
Service brake stop lamp switch
*
(i)
Automatic slack adjusters on cam type brakes or internal self-adjusting brakes on
wedge and disc type brakes.
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 capacity of removing a minimum of 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 Trailer brake control system. When specified (see 6.2), a trailer brake control
system shall be furnished in addition to the components specified in 3.4.11.1. Components and
accessories shall be mounted on the vehicle chassis. 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)
Air connectors for trailer with SAE J318 gladhand couplers mounted at the rear of
the vehicle, loaded to prevent interference with trailer
(g)
Two SAE J844 coiled air hoses, each not less than 110 inches long when fully
extended, 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
(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.
3.4.11.4 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.
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