So to report in. The problem was the diaphragm in the curbside Brake Canister was leaking, actually not perforated but the diaphragm flange that gets pinched in between the canister halves went bad and lost its seal. This is the Canister that they use to lift the TAG AXLE. It is a Type 30 short stroke. There are two, a short stroke which is a 2.5-inch stroke, and a long stroke which is a 3-inch stroke. Actually on this chassis at least it would not matter either would work as you can adjust the lift height by changing the links on the lift chain. So thanks for the help which got me to the correct part to replace. And actually, this was the main problem with the other issue I had in the "another air system problem" thread. I think I had a couple of issues there. I'll do some more testing tomorrow but it appears to be working 100% now.
