How is the spring-loaded brake on the trailer operated ?
In front of the trailer emergency valve there is a double release valve . The second, mostly red button is used to actuate and release the spring-loaded brake
On the frame there is a button, usually colored red, which, when pressed, inflates or deflates the trailer's spring-loaded cylinders
If the spring brake of the towing vehicle is activated before the trailer is uncoupled, the spring brake of the trailer brakes automatically
The spring-loaded brake only works , when the compressed air supply has escaped during a long period of inactivity