What a video.I recommend to everybady to watch this clear sample video to understand how to inspect or procedure for testing protection valves. Thanks Jaideep.
There is no yellow line on truck 3 lines green line is used for trailer lamps and indicator all that Red line is supply air to trailer… Blue is service line which help to use trailer service brake👍👍
Blue line is actually the service line. When both yellow and red knobs are released (pushed in), and you press on the “service” brake pedal, air will run through the blue line so the trailer brakes.
You should of released both yellow and red buttons. How are you gonna check the air leaks to trl if you didn’t release the trl’s air supply (red) button😵💫👎
Hello Mr. nazi this test is without trailer to check the tractor protection valve to check leakage from service line this is not a test to check Supply valve. Thanks….👍
@@jaideep16a84 yes but , the propose of protection valve is if there is any major leak through the trl lines than dhut down service air to trl right? So if you are not releasing red button to trl mean is; there will be no air circulation on the system to be keak or not🤔how are you gonna check leak than!?
