Trailer Air Lines Every combination vehicle has two air lines. These lines are the service line and the emergency line. They run between each vehicle, such as tractor to trailer, trailer to dolly, and dolly to second trailer.
SERVICE AIR LINES.— The service line carries air that is controlled by the foot brake or the trailer hand brake. Depending on how hard the foot brake is engaged, the pressure in the service line will similarly change. The service line is connected to relay valve(s) on the trailer to apply more or less pressure to the trailer brakes. As pressure increases in the service line, the relay valve opens and sends air pressure from the trailer air tanks to the trailer brake chambers, thus applying the trailer brakes.
EMERGENCY AIR LINES.— The emergency line has two purposes. First, it supplies air to the trailer air tanks. Second, the emergency line controls the emergency brakes on the combination vehicle. Loss of air pressure in the emergency line causes the trailer emergency brakes to activate. The pressure loss could be caused by a trailer breaking loose and tearing apart the emergency air hose. The loss could also be the result of a hose, metal tubing, or other parts breaking and causing an air leak. When the emergency line loses pressure, it also causes the tractor protection valve to close, causing the air supply knob to pop out.
Emergency lines such as hoses couplers, and other parts, have a red covering. The red covering allows you to separate the emergency lines from the service lines which have a yellow covering.
Dodatkowo na obrazku masz jakie laczniki stosujemy w UK inne niz w Europie niewiem czy lepsze napewno inne
Na zdjeciu jest system rolniczy odwrotny przyczepa ma przewody a traktor gniazda w ciezarowce oczywiscie masz odwrotnie ciagnik ma przewody a naczepa gniazda
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