How to disable a brake chamber

@Skate-Board , How did this finish up?

I'm curious to know what the problem was..

 

Whoa. That shouldn't be happening. With your red button pushed in, (which supplies air to the trailer) stick a block in front and behind a wheel, release your tractor brakes, then pull your glad hand off the service side (blue, passenger side). There should not be any air applied down that line. Sounds to me like there might be? If not, then I will shut up and leave this one to the experts

 

I was thinking of a way to back off your slack adjuster with pressure applied by the brake chamber. May be you can use a winch strap or a chain binder to relieve enough pressure to remove the pin and back off slack adjuster.
Reading your last post it appears you have a problem that I am not qualified to help with. Please let us know what the problem was when you get it fixed. Thanks and Good luck.

 

Not familiar with a trailer but have a 359 Pete. When I got it the brakes took a while to release. The problem was the relay valve. I can stick a rod thru the clevis and apply brakes. If no dust covers can check for broken return springs etc.

 

I had a can go bad on my truck. Mechanic in our shop told me to pull the airline off and put a dime on the fitting and then put the hose back on. Then you cage the can to release the parking brake. Don't see why it would not work on the service side of the can also.

 

I have always carried a cage bolt and a few brake lining rivets in my tool box. Take the air line off at the brake can, put a rivet in the fitting & re-attach, it's disabled & invisible.

I agree that your problem could well be a relay/quick release valve.

 

This is the same problem I'm having with my freightliner dump truck ..all new drums s cam and bushing new brakes new brake valve on the firewall and 2 new chambers 4 new slackadjuster still drags the back right side wheels. ..this junction box it's that the 1 on the frame at the rear withall the lines going to it..

 

So, how did the OP make out?