The blue line is the air line for the trailer's service brake. Connect these lines to the corresponding couplers and socket on the trailer before moving the trailer. We recommend starting with the blue line since it is the farthest away.Jan 10, 2017
What does the blue air line do?
As you can see in the picture above, the blue color hose, called service line, is used to carry air to the brakes. It is controlled by the foot brake on the trailer. The red one, called supply line or emergency line, is used to supply a steady stream of air to the air tanks.
What are the blue and red air lines for?
The red line is the air line for the trailer's emergency brake. The green line is the electrical line. The blue line is the air line for the trailer's service brake.Jan 10, 2017
What color is the emergency air line on a tractor trailer?
color red
What is the red and blue air line on a tractor trailer?
The red line is the air line for the trailer's emergency brake. The green line is the electrical line. The blue line is the air line for the trailer's service brake. Connect these lines to the corresponding couplers and socket on the trailer before moving the trailer.Jan 10, 2017
What are the air lines on a truck?
Air line hoses are flexible tubes used to convey pressurised air. They are commonly used for carrying a supply of compressed air to operate pneumatic powered systems, such as a road vehicle air brake system for large vehicles and a railway air brake system for railway carriages / locomotives.
What are the blue and red glad hands?
Gladhands are designed to allow the driver to disconnect without a mechanic or tools. ... Gladhands are color coded. In North America, service lines are blue and emergency brake lines are red and are standardized by SAE International's standard SAE J318.
What is the red line on a tractor trailer?
air line
What color are air brake lines?
Air and Electrical Lines The red line is the air line for the trailer's emergency brake. The green line is the electrical line. The blue line is the air line for the trailer's service brake.Jan 10, 2017