Dropping neck on mechanical DD

Yes, THAT lever. That retracts the dowels. Like @johndeere4020 and others have said, drop the trailer, take pressure off the dowels, then step on the lever to retract the pins, then you back back under the trailer lifting the neck.

 

See this lever, you need to roll this back. It pulls the dowels in. Sometimes they are very stiff. Stand on that lever or get something for leverage to move it. You will not get the neck off if these are not retracted

 

So you have the neck kingpin locked back into the fifthwheel and the 4x4 is between the top of your frame and the neck, right?

 

Unhook them. The lock cylinder gets it's air from the red air line on your tractor

 

Air your bags up and pull away if your neck pin is unlocked.