Installing a shut-off valve to the air brakes for trailer???

You'll wish you never thought about it the first time you hit your brakes on wet roads. Brakes are on a trailer for a reason.

 

Make your trailer brakes inoperable in slick condtions, you're just asking for trouble. Get in a wreck and the DOT finds the brakes tampered with, just remember, "Do you want fries with that?"

I've driven non ABS trailers on snow and ice for years and never had a problem.

 

I know what you mean S.H.C. sometime you have to think outside the box. when I had a air leak in my sys, I put a line valve right behind the dr side air tank & would shut off air from that point back, until I found the leak. at least when I started the next day, I would have 90-100 lbs of air instead of being on 10 lbs. every one told me, don't do that, just find & fix the leak. I did but until then, my method worked. it helped me. I did not post prob here, but never the less. if you try it & it works for you, I do not know what will happen if you do this, but you probably feel you have to do something. as far as keeping a good distance between you an any vehicle in front of you( safe stopping distance, you & I both know, that is b.s. SOMETIMES, as soon as you create a safe gap, A vehicle will fill the gap!

oh; & btw I would only shut my air off when parked overnight at home & reopen when starting next morning. I did not leave air shut off while driving.

 

i worked for roadway for 10 years mainly pa to new england, thousands of times with a loaded pup on the front and an empty or very light one on the back never turned the brakes off on the kite even in heavy snow......

learn how to drive and adjust your driving to conditions

 

Then just modify your truck. They make an air valve for drop axles that is adjustable. We had them on our dump trucks so we could turn the dial and back the pressure off the axle as the paving machine pulled us and we emptied out. Otherwise we'd tear the new pavement up. Put one of those in with the service line run through it and you could back the pressure off but still have brakes. I wouldn't cut them off entirely.

 

it is not good.
as I understand company trailers got no abs. Right?

So you need something to limit service brake pressure.