53' dry van wheels will move without air?

Man i would assume that would basically be impossible to clear out. I would assume the red feed line is what has a clog if any of them do. I wouldn't have any idea how to clean it. I mean it obviously already has plenty of air pressure on it everyday. Maybe I will just shoot some WD40 in the gladhand and then unhook the red line from my spring brake control valve and see if that blasts anything out?

 

I am open to any other ideas of what to pour in there that could possibly help. I have some airbrake antifreeze around somewhere as well. On a side note my old truck before this one I did have to replace the tanks due to rust issues.....so there could be a piece of rust or something in that line somewhere. Good thing there is only 53ft of it....

 

Sorry for so many posts I'm just thinking out loud here. I wonder if I try to back feed the line from the back with my air compressor if that could potentially help dislodge anything. I will try that tomorrow morning and see what I figure out. Please post any other ideas or suggestions you have cause I am definitely getting a little off the path here.

 

I will check this too. The only other thing I found that I thought might not be factory is there is a T fitting coming off the main red feed line to supply air for my tandem locks. Not sure if that is factory or someone just decided to do that. I think the air bags get air from there as well so I assume it came from factory like that?

 

Well guys...I pulled apart every fitting one by one and blasted the whole system step by step with cleaner....still get the same result. It blasts off air setting the brakes partially but then takes 10-15 mins to slowly drain the rest for a full set of the brakes. No kinks and no clogs that I can find. Not really sure what to do about it. When I go back to that particular warehouse I will just tell them hey the brakes are fine but it takes 10-15 mins for them to set 100%. Also the reason they never noticed before at this place was because they took longer than 10 mins to grab my trailer. Last time they grabbed it as soon as I dropped it.

 

One and I already replaced it. Exact same results. Blasts off air. Sets the spring brakes about 75%-80%. Then slowly drains the rest back through the system before setting 100% 10-15 mins later. Zero air leaks on the trailer. None of the canisters are very old. Are those quick release valves adjustable in anyway? It literally just doesn't let enough air out.

 

I have made a separate thread based around the sealco 110500 which is the spring brake control valve. It seems to be the issue in this situation so I am going to see if anyone can help when it is targeted to just that piece. It honestly seems like it just doesn't release the proper amount of air for whatever reason.