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Message: <blockquote data-quote="Dracula" data-source="post: 2519202" data-attributes="member: 42691"><p>BTW, we were always trained, after hooking up trailers, to move forward a few feet, then drop the hand valve. Nobody ever explained why that was to me. Maybe they did to you. But since the purpose of the hand valve is to lock up the trailer brakes, someone finally told me that it was to make sure your trailer brakes were operational. You can always tell when trailer brakes are getting long in the tooth. When you drop the hand valve, and the trailer doesn't jerk to a stop, it very slowly comes to a stop. That's when I red tag a trailer.</p></blockquote><p></p>