Know What This Does?

Behind Rear axle on trailer is a tiny air bag, been told it's maybe a parking brake chamber or some kinda shock absorber when trailer is being loaded. Anyways it's leaking, everytime I apply the service brake I lose air pressure pretty quick. Just wanted to learn what the hell it's purpose is. Don't have this trailer anymore dropped it at company yard and got me a shiny 2016 trailer.

 

So in unmechanical moron terms it's an air bag to cushion the pushin during loading unloading?

 

Thanks for the info, Dropped that trailer at my company yard in Atlanta so they can replace the bag. TA didn't have it "of course" when I got it checked out by them. 1st I thought it was one of my brake chambers cause everytime I hit the brakes the air would drop quick.