How to disable a brake chamber

I just had new drums, brakes, springs and bushings put on my trailer. One of my brakes is not releasing and dragging. If I step on the brake it sticks. It looks like the rod that is attached to the S cam and slack adjuster needs new bushings.

I need to disable that brake chamber and don't know how. I tried backing off the slack adjuster but since the brakes and drums are new there is no room to back it off.

I spent an hour outside trying to take the clevis off the rod. I got the cotter pin out but I can't budge the pin?

Since I'm empty that dragging brake is real bad! Any ideas?

 

T-Bolt? Cage bolt? Not sure what that is? Is that the rod they stick down the chamber? Is there a nut on it? Never done this before. I'm at the Loves in Bennett, CO and they don't have a clue.

 

Ok. So tightening that rod will release the brake and keep it off? Keep in mind there is like 1/4" of play on the slack adjuster.

 

Thanks! Looks simple enough. Although. I got the bright idea to take the covers off my air horns and paint them. One screw broke off in the hole. That ended up being a whole day affair trying to drill out the screw. I was going to use an EZ Out so I drilled a small hole into the screw. The drill broke off. This is how many of my simple tasks turn into a major ordeal.