53' dry van wheels will move without air?

Here is a picture of the valve on my trailer, my trailer is a 2018 so it may be different from yours.

 

Here’s mine. It started leaking around the top hat looking thing. Whole suspension would lose air while sitting. Wouldn’t air up without beating on it. Once replaced, it stays put in the dock.

 

I just went through this, on two trailers. One was the valve and the other was all the slack adjusters were seized and there was almost no contact of the shoes to drums (just had an annual 3mos ago!).

Once home, definitely revisit your slack adjusters and manually adjust them, when you’ve got time to look around at everything. If you can still push the trailer, then, you have air trapped in the system. If you have a bunch of air blow back up through your tractor valve on the firewall, when you set only the trailer brakes, it’s definitely the trailer valve.

 

Yep. That’s it. Good deal!!!

 

Only thing I can think of is debris blocking a line. Tanks rust from the inside and the scaling can become dislodged and block lines. Beyond that, I’m not sure.