How much air does it take to unlock trailer brakes?

You can just release them with a bolt like wreckers do.

 

Depends on how good the trailer holds air.
If it slow leaks it will take a lot more then 10.

 

Cage the Chambers, And keep em caged till they rust apart and break...Until then you'll be able to move the trailer at any time without worrying about brakes

 

Yes it would work, should need somewhere upwards of 70-90psi to release brakes. My company made something similar to use with the front end loaders quick coupler. Basically a flat plate with a hole for the kingpin to drop into and a 10 gallon tank with glad hand and a on/off valve plus a quick connect to fill it with air. The bottom of the flat plate has kind of a square box welded to for support and for when not in use

 

I bet you would be able to get by with a 10 gallon tank like others have said if the trailer's air system isn't too leaky. I regularly have to move our pintle hitch 3 axle about 20 feet in my yard to access stuff sometimes, I just run a long line to my shop air with a gladhand with a quick coupler on it. If I've gotta move it further than that a truck is always available, but sometimes it's just handy to air it up and move it with the skid steer.

A guy could probably even plumb a valve between the gladhand and quick coupler and just air the trailer up, shut the valve off disconnect your air supply and go. I haven't personally tried that yet though.

 

Actually, just thought of this after I posted that. If the trailer's air ride, it would probably take considerably more because I would imagine that you'd be using up air to air up the bags after you get your brakes released.

Trailer I move with my skid steer is Reyco IIRC.

 

Should be easy to do a test. I can't remember how it goes but the relay valve on the trailer will supply the brakes before the air bags.

 

In our shop we have glad hands with shut off valves and the male quick connect fitting. They just air up the trailer, shut the valve and disconnect the air hose.

 

If you've got an air dump valve on the trailer, just keep it dumped. When I park my trailers for a while, I always dump the air anyway especially if they are loaded.