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
Air storage reservoir(s), each tank equipped with drain, and with safety and check
valves between the compressor and the last reservoir tank
Foot control, suspended or treadle type
Air control valves
Air pressure gage, visible to the driver
Low air pressure warning, visible and audible
Service brake stop lamp switch
Automatic moisture ejector
Automatic slack adjusters.
* 18.104.22.168.1 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 precooler 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.
22.214.171.124 Trailer brake control system. When specified (see 6.2), in addition to the
components specified in 126.96.36.199 and 188.8.131.52.1, a trailer brake control system shall be furnished.
The trailer brake control system shall include:
Identification of emergency and service lines
Coincident control of trailer brakes with prime mover foot control
Independent hand control for trailer brakes
Prime mover protection valve with dash control and automatic breakaway feature
Trailer stoplight control operable with foot brake and with hand control for trailer
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
Air connectors for trailers with SAE J318 gladhand couplers mounted at the rear of
the vehicle, located to prevent interference with trailer
Dummy gladhand couplers with chains
Prime mover only parking brake valve to permit prime mover parking brakes to be
applied while charging the trailer air brake system.