what is this call?

If one axle is sitting on air ride and the other is sitting on the locks your weights will not be distributed evenly on the tandems and the ports here will notice and throw the trailer out of service, (30k on one axle, 4k on the other, ect.). Have to go throw a bottle jack under the front axle many times to get weight off the sureloks and get them to kick back out.

 

I never noticed them before either. So, to recap, when getting loaded/unloaded at a dock, should we keep the red trailer knob IN or OUT?

 

You aren't gonna have a choice a lot of places. They ask you to pull your red airline and they put a glad hand lock on it for their safety, so you can't pull out before they are done. I don't love this but it is one of the few dock rules I do understand.

I'd much rather do this than the docks that want you to completely unhook and pull forward a few feet.

 

Out ... learned it the hard way. Had to replace an airbag.

 

I usually just put my tandems all the way back and set the spring brakes. I guess this will add some support to the air bags. I never noticed those supports either.

 

had this happen a few weeks ago. the guy didnt set brakes on the fork lift and it rolled off the dock and hit my trailer

 

YOU can set your tractor brakes and still let air flow trow the trailer line.

 

i guess. the fork lift rolled right off the dock and dropped on the ground

 

Y?

 

why what