When the air loss in the control (service) line occurs, what is the first reaction?

When there is a loss of air in the control (service) line, the first reaction is that the tractor protection system will activate. This system is designed to prevent air loss from affecting the trailer's braking ability by isolating the trailer when a critical malfunction occurs in the braking system.

The tractor protection system functions as a safety mechanism; it ensures that the driver can maintain control and safely maneuver the vehicle in response to a loss of air pressure. By activating, it secures the trailer brakes and prevents them from releasing, which might otherwise lead to a dangerous situation where the trailer could become unmanageable or detached.

This activation allows the driver to address the problem safely without immediately stopping the vehicle abruptly, which could create additional hazards, especially in traffic. Thus, understanding how the tractor protection system operates is crucial for safe vehicle operation in scenarios involving air loss.