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If there is enough air in the system and the cab air control is engaged it should level.

Yup thats it. Its in the parts tm. In the manufacturers diagram they dont have that extra line.

One on the right has the check valve

Some have the check at one bag some dont.

Allows for quick air release when deactivating the airbags. Probably a bad check valve now that I think about it.

So for some reason the system has 2 air feed lines one to the cab level valve and one to one of the airbags and its supposed to have a check valve at this line where it meets the airbag feed, per the parts tm. I am thinking its either for over-pressure or its a drain down line. I spoke with the...

The system has 2 air feeds it's branched off. One to the valve and and a feed to one air spring.

The airbags over inflate. Only place air leaks is the leveler once it's maxed out.

I'm still working on one. Figured out the leveling valve is actually made by Barksdale. Costs a lot less than the Powerpacker branded version. I have one truck no matter what I do or swap the airbags inflate to the max and the darn level valve leaks. It's not the level valve swapped that twice...

Could be hooked up wrong. Playing with one right now. Could be bad valve.

When sitting the bags come up to height and then adjust when driving. Maybe a line could be swapped somewhere.

Haven't seen this issue before. Do the cab air springs lift or stay down?