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NCN

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    NCN posted a topic in Air Systems and Brakes

    I have a 2001 RD688 Tandem dump 15' body, I think I'm the third owner. My problem is that the trolley brake leaver that should become live for the trailer after the trailer air is activated is live all the time. When the trailer valve is activated I have no trailer air at the rear port. High pressure brake air is present at the rear but no trailer brake air. Looking for answers if anyone can help

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