hypothetical question. W&D set up , drop trailer and get a tug having no rear under run bar on the unit…who will carry the can ?
the under run bar on the prime mover just drops down once trailer is off.just held up by 2 retactalbe pins 
if you don’t drop it you are incharge so you carry the can 
As wildfire said, it’s a moveable under-run bar so that you can couple up the drag unit, when you drop the drag unit, just have a look, you’ll see this sort of system
As you can see, pull the 2 levers that pop the pins out, move the bar down, push the 2 levers back in and you’re done
There are different styles, but all basically work the same.
nobby003:
hypothetical question. W&D set up , drop trailer and get a tug having no rear under run bar on the unit…who will carry the can ?
Your boss.
Worst case scenario you and the boss, you for using and the boss for permitting.
If the drag isn’t uncoupled very often then a can or two of WD40 and a belly buster breakfast might be handy for lowering the bar after dropping the trailer.
cheers people
wildfire:
the under run bar on the prime mover just drops down once trailer is off.just held up by 2 retactalbe pins
if you don’t drop it you are incharge so you carry the can
This ^^^
The wag n drags I’ve driven have all had under-run bars that can be dropped into position, so assuming that you’ve been trained on the wag n drag it’s your responsibility to drop them into place.
What sort of body work on the wag and drag, a tipper or skip for instance wouldn’t require one.
Harry Monk:
nobby003:
hypothetical question. W&D set up , drop trailer and get a tug having no rear under run bar on the unit…who will carry the can ?Your boss.
Agreed