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<blockquote data-quote="olroadbeech" data-source="post: 3622266" data-attributes="member: 52145"><p>anytime before you leave whether with one trailer , 2 trailers , or 3 you do the exact same thing.</p><p></p><p>before leaving</p><p></p><p>supply air to trailers , pull hand valve , and try to go. you shouldn't be able to go. if you pin is not locked you'll find out so don't be gung ho about it. </p><p></p><p>then release hand valve and move forward slowly and push in brake pedal. you should stop. if you hear air then that blue glad hand is either not connected, not connected properly or the rubbers in the glad hands are not sealing and may need replacing. always carry extra's.</p><p></p><p>you can't pass the DOT test if you don't perform these tests. </p><p></p><p>some drivers , when they are breaking up a set , for some reason only close one valve on the back of the trailer. you'll find this out on a proper pre-trip on your walkaround. if you happen to miss it , you'll find out before you leave , pulling down your hand valve and wondering why you hear air blowing out that open valve and watching your air gauge go down.</p></blockquote><p></p>
[QUOTE="olroadbeech, post: 3622266, member: 52145"] anytime before you leave whether with one trailer , 2 trailers , or 3 you do the exact same thing. before leaving supply air to trailers , pull hand valve , and try to go. you shouldn't be able to go. if you pin is not locked you'll find out so don't be gung ho about it. then release hand valve and move forward slowly and push in brake pedal. you should stop. if you hear air then that blue glad hand is either not connected, not connected properly or the rubbers in the glad hands are not sealing and may need replacing. always carry extra's. you can't pass the DOT test if you don't perform these tests. some drivers , when they are breaking up a set , for some reason only close one valve on the back of the trailer. you'll find this out on a proper pre-trip on your walkaround. if you happen to miss it , you'll find out before you leave , pulling down your hand valve and wondering why you hear air blowing out that open valve and watching your air gauge go down. [/QUOTE]
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