What is the reason that the trailer valve leaks from below?
The cause of the trouble is that the brake distribution valve of the trailer brake valve or trailer is faulty, but the former is very unlikely. Method of distinguishing fault parts is: a certain pressure in the trailer inside the tank after the first gas path switch off, then press the brake pedal and keep the position of the brake pedal does not move, listening to the trailer brake valve whether the leak sound does not stop.If you can hear the constant leakage of air (very few cases), then the trailer brake valve failure. If the air leak is not heard, the trailer brake distribution valve may be defective. This can be verified by the following method: the air pipe from the trailer to the car is pulled out from the rear of the automobile, and the air pipe connected with the trailer air road shall be kept leaking
Pipe damage. The interface seal is not in place.Like trailer valve leakage will have two reasons. 1 is the trailer itself is valve leakage. Trailer valve does not work all this means "leak" to replace the trailer valve 2 is due to leakage caused by the trailer behind the bridge synchronous valve. There's a reason for the leak. When you put on the brakes or pulling the handbrake trailer valve will leak, and that itself has nothing to do with the Trailer Trailer valve is three synchronous valve caused by inverse gas. Replace the synchronization valve on the OK pull. Just personal opinion. For reference only
Under normal circumstances. When the brake pedal is pulled down or the air pipe of the trailer is pulled out, there should be only one gas (compressed air in the trailer, brake valve, air chamber) out of the trailer, brake valve, vent or trailer air pipe
