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|  MIL-T-62319C
3.4.10.6 Tire chain clearance. Tire chain clearance in accordance with SAE J683 shall be
provided. Allowance for spring deflection shall be included.
* 3.4.11 Brakes. Brakes shall conform to Federal Motor Carrier Safety Regulations 393.40
through 393.43 and 393.45 through 393.52. Brake linings shall be of nonasbestos material.
3.4.11.1 Air brakes. A four-wheel brake system consisting of full-air-application brakes
shall be provided. The braking system, complete with all necessary components, shall include:
(a) Air compressor, unloader-head type, engine driven and engine lubricated, air or water
cooled, and having a capacity of not less than 7-1/4 cubic feet per minute (cfm)
(b) Air storage reservoir(s), each tank equipped with drain, and with safety and check valves
between compressor and last reservoir tank
(c) Foot control, suspended or treadle type
(d) Air control valves
(e) Air pressure gage, visible to the driver
(f) Low air pressure warning, visible and audible
(g) Service brake stop lamp switch
(h) Automatic moisture ejector
*
(i) Automatic slack adjusters on cam type brakes or internal self-adjusting brakes on wedge
and disc type brakes.
* 3.4.11.2.1 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 Trailer brake control system. In addition to the components specified in 3.4.11.2, 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
(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
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